* [PATCH] Staging: kpc2000: kpc_dma: resolve checkpath errors and warnings
@ 2019-05-10 19:38 Vandana BN
2019-05-10 20:34 ` [Linux-kernel-mentees] " Lukas Bulwahn
` (4 more replies)
0 siblings, 5 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-10 19:38 UTC (permalink / raw)
To: gregkh, devel, linux-kernel; +Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resolves coding style errors and warnings reported by chechpatch
ERROR: "(foo*)" should be "(foo *)"
ERROR: trailing whitespace
ERROR: space required before the open brace '{'
ERROR: "foo * bar" should be "foo *bar"
ERROR: space prohibited after that '!' (ctx:BxW)
ERROR: space prohibited after that open parenthesis '('
ERROR: switch and case should be at the same indent
ERROR: trailing statements should be on next line
ERROR: Macros with complex values should be enclosed in parentheses
ERROR: "foo __init bar" should be "foo __init bar"
ERROR: "foo __exit bar" should be "foo __exit bar"
WARNING: Missing a blank line after declarations
WARNING: Prefer using '"%s...", __func__' to using function's name, in a string
WARNING: braces {} are not necessary for any arm of this statement
WARNING: unnecessary cast may hide bugs
WARNING: braces {} are not necessary for single statement
WARNING: struct file_operations should normally be const
WARNING: labels should not be indented
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/dma.c | 137 +++++------
drivers/staging/kpc2000/kpc_dma/fileops.c | 220 +++++++++---------
.../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 121 +++++-----
.../staging/kpc2000/kpc_dma/kpc_dma_driver.h | 32 +--
4 files changed, 265 insertions(+), 245 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index 6959bac11388..e7967f3089c2 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -14,11 +14,11 @@
static
irqreturn_t ndd_irq_handler(int irq, void *dev_id)
{
- struct kpc_dma_device *ldev = (struct kpc_dma_device*)dev_id;
-
+ struct kpc_dma_device *ldev = (struct kpc_dma_device *)dev_id;
+
if ((GetEngineControl(ldev) & ENG_CTL_IRQ_ACTIVE) || (ldev->desc_completed->MyDMAAddr != GetEngineCompletePtr(ldev)))
schedule_work(&ldev->irq_work);
-
+
return IRQ_HANDLED;
}
@@ -28,42 +28,42 @@ void ndd_irq_worker(struct work_struct *ws)
struct kpc_dma_descriptor *cur;
struct kpc_dma_device *eng = container_of(ws, struct kpc_dma_device, irq_work);
lock_engine(eng);
-
+
if (GetEngineCompletePtr(eng) == 0)
goto out;
-
+
if (eng->desc_completed->MyDMAAddr == GetEngineCompletePtr(eng))
goto out;
-
+
cur = eng->desc_completed;
do {
cur = cur->Next;
dev_dbg(&eng->pldev->dev, "Handling completed descriptor %p (acd = %p)\n", cur, cur->acd);
BUG_ON(cur == eng->desc_next); // Ordering failure.
-
- if (cur->DescControlFlags & DMA_DESC_CTL_SOP){
+
+ if (cur->DescControlFlags & DMA_DESC_CTL_SOP) {
eng->accumulated_bytes = 0;
eng->accumulated_flags = 0;
}
-
+
eng->accumulated_bytes += cur->DescByteCount;
if (cur->DescStatusFlags & DMA_DESC_STS_ERROR)
eng->accumulated_flags |= ACD_FLAG_ENG_ACCUM_ERROR;
-
+
if (cur->DescStatusFlags & DMA_DESC_STS_SHORT)
eng->accumulated_flags |= ACD_FLAG_ENG_ACCUM_SHORT;
-
- if (cur->DescControlFlags & DMA_DESC_CTL_EOP){
+
+ if (cur->DescControlFlags & DMA_DESC_CTL_EOP) {
if (cur->acd)
transfer_complete_cb(cur->acd, eng->accumulated_bytes, eng->accumulated_flags | ACD_FLAG_DONE);
}
-
+
eng->desc_completed = cur;
} while (cur->MyDMAAddr != GetEngineCompletePtr(eng));
-
+
out:
SetClearEngineControl(eng, ENG_CTL_IRQ_ACTIVE, 0);
-
+
unlock_engine(eng);
}
@@ -73,171 +73,172 @@ void start_dma_engine(struct kpc_dma_device *eng)
{
eng->desc_next = eng->desc_pool_first;
eng->desc_completed = eng->desc_pool_last;
-
+
// Setup the engine pointer registers
SetEngineNextPtr(eng, eng->desc_pool_first);
SetEngineSWPtr(eng, eng->desc_pool_first);
ClearEngineCompletePtr(eng);
-
+
WriteEngineControl(eng, ENG_CTL_DMA_ENABLE | ENG_CTL_IRQ_ENABLE);
}
int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
{
u32 caps;
- struct kpc_dma_descriptor * cur;
- struct kpc_dma_descriptor * next;
+ struct kpc_dma_descriptor *cur;
+ struct kpc_dma_descriptor *next;
dma_addr_t next_handle;
dma_addr_t head_handle;
unsigned int i;
int rv;
+
dev_dbg(&eng->pldev->dev, "Setting up DMA engine [%p]\n", eng);
-
+
caps = GetEngineCapabilities(eng);
-
- if (WARN(!(caps & ENG_CAP_PRESENT), "setup_dma_engine() called for DMA Engine at %p which isn't present in hardware!\n", eng))
+
+ if (WARN(!(caps & ENG_CAP_PRESENT), "%s() called for DMA Engine at %p which isn't present in hardware!\n", __func__, eng))
return -ENXIO;
-
- if (caps & ENG_CAP_DIRECTION){
+
+ if (caps & ENG_CAP_DIRECTION)
eng->dir = DMA_FROM_DEVICE;
- } else {
+ else
eng->dir = DMA_TO_DEVICE;
- }
-
+
eng->desc_pool_cnt = desc_cnt;
eng->desc_pool = dma_pool_create("KPC DMA Descriptors", &eng->pldev->dev, sizeof(struct kpc_dma_descriptor), DMA_DESC_ALIGNMENT, 4096);
-
+
eng->desc_pool_first = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &head_handle);
- if (!eng->desc_pool_first){
- dev_err(&eng->pldev->dev, "setup_dma_engine: couldn't allocate desc_pool_first!\n");
+ if (!eng->desc_pool_first) {
+ dev_err(&eng->pldev->dev, "%s: couldn't allocate desc_pool_first!\n", __func__);
dma_pool_destroy(eng->desc_pool);
return -ENOMEM;
}
-
+
eng->desc_pool_first->MyDMAAddr = head_handle;
clear_desc(eng->desc_pool_first);
-
+
cur = eng->desc_pool_first;
- for (i = 1 ; i < eng->desc_pool_cnt ; i++){
+ for (i = 1 ; i < eng->desc_pool_cnt ; i++) {
next = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &next_handle);
- if (next == NULL)
+ if (!next)
goto done_alloc;
-
+
clear_desc(next);
next->MyDMAAddr = next_handle;
-
+
cur->DescNextDescPtr = next_handle;
cur->Next = next;
cur = next;
}
-
+
done_alloc:
// Link the last descriptor back to the first, so it's a circular linked list
cur->Next = eng->desc_pool_first;
cur->DescNextDescPtr = eng->desc_pool_first->MyDMAAddr;
-
+
eng->desc_pool_last = cur;
eng->desc_completed = eng->desc_pool_last;
-
+
// Setup work queue
INIT_WORK(&eng->irq_work, ndd_irq_worker);
-
+
// Grab IRQ line
rv = request_irq(eng->irq, ndd_irq_handler, IRQF_SHARED, KP_DRIVER_NAME_DMA_CONTROLLER, eng);
- if (rv){
- dev_err(&eng->pldev->dev, "setup_dma_engine: failed to request_irq: %d\n", rv);
+ if (rv) {
+ dev_err(&eng->pldev->dev, "%s: failed to request_irq: %d\n", __func__, rv);
return rv;
}
-
+
// Turn on the engine!
start_dma_engine(eng);
unlock_engine(eng);
-
+
return 0;
}
void stop_dma_engine(struct kpc_dma_device *eng)
{
unsigned long timeout;
+
dev_dbg(&eng->pldev->dev, "Destroying DMA engine [%p]\n", eng);
-
// Disable the descriptor engine
WriteEngineControl(eng, 0);
-
+
// Wait for descriptor engine to finish current operaion
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & ENG_CTL_DMA_RUNNING){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & ENG_CTL_DMA_RUNNING) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "DMA_RUNNING still asserted!\n");
break;
}
}
-
+
// Request a reset
WriteEngineControl(eng, ENG_CTL_DMA_RESET_REQUEST);
-
+
// Wait for reset request to be processed
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & (ENG_CTL_DMA_RUNNING | ENG_CTL_DMA_RESET_REQUEST)){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & (ENG_CTL_DMA_RUNNING | ENG_CTL_DMA_RESET_REQUEST)) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "ENG_CTL_DMA_RESET_REQUEST still asserted!\n");
break;
}
}
-
+
// Request a reset
WriteEngineControl(eng, ENG_CTL_DMA_RESET);
-
+
// And wait for reset to complete
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & ENG_CTL_DMA_RESET){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & ENG_CTL_DMA_RESET) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "DMA_RESET still asserted!\n");
break;
}
}
-
+
// Clear any persistent bits just to make sure there is no residue from the reset
SetClearEngineControl(eng, (ENG_CTL_IRQ_ACTIVE | ENG_CTL_DESC_COMPLETE | ENG_CTL_DESC_ALIGN_ERR | ENG_CTL_DESC_FETCH_ERR | ENG_CTL_SW_ABORT_ERR | ENG_CTL_DESC_CHAIN_END | ENG_CTL_DMA_WAITING_PERSIST), 0);
-
+
// Reset performance counters
-
+
// Completely disable the engine
WriteEngineControl(eng, 0);
}
void destroy_dma_engine(struct kpc_dma_device *eng)
{
- struct kpc_dma_descriptor * cur;
+ struct kpc_dma_descriptor *cur;
dma_addr_t cur_handle;
unsigned int i;
-
+
stop_dma_engine(eng);
-
+
cur = eng->desc_pool_first;
cur_handle = eng->desc_pool_first->MyDMAAddr;
-
- for (i = 0 ; i < eng->desc_pool_cnt ; i++){
+
+ for (i = 0 ; i < eng->desc_pool_cnt ; i++) {
struct kpc_dma_descriptor *next = cur->Next;
dma_addr_t next_handle = cur->DescNextDescPtr;
+
dma_pool_free(eng->desc_pool, cur, cur_handle);
cur_handle = next_handle;
cur = next;
}
-
+
dma_pool_destroy(eng->desc_pool);
-
+
free_irq(eng->irq, eng);
}
-
/********** Helper Functions **********/
int count_descriptors_available(struct kpc_dma_device *eng)
{
u32 count = 0;
struct kpc_dma_descriptor *cur = eng->desc_next;
- while (cur != eng->desc_completed){
+
+ while (cur != eng->desc_completed) {
BUG_ON(cur == NULL);
count++;
cur = cur->Next;
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 5741d2b49a7d..db38f9c8e12a 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -21,6 +21,7 @@ unsigned int count_pages(unsigned long iov_base, size_t iov_len)
{
unsigned long first = (iov_base & PAGE_MASK) >> PAGE_SHIFT;
unsigned long last = ((iov_base+iov_len-1) & PAGE_MASK) >> PAGE_SHIFT;
+
return last - first + 1;
}
@@ -28,7 +29,9 @@ static inline
unsigned int count_parts_for_sge(struct scatterlist *sg)
{
unsigned int sg_length = sg_dma_len(sg);
+
sg_length += (0x80000-1);
+
return (sg_length / 0x80000);
}
@@ -50,20 +53,20 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
u64 card_addr;
u64 dma_addr;
u64 user_ctl;
-
+
BUG_ON(priv == NULL);
ldev = priv->ldev;
BUG_ON(ldev == NULL);
-
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void*)iov_base, iov_len, ldev);
-
- acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
- if (!acd){
+
+ dev_dbg(&priv->ldev->pldev->dev, "%s(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", __func__, priv, kcb, (void *)iov_base, iov_len, ldev);
+
+ acd = kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
+ if (!acd) {
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the aio data\n");
return -ENOMEM;
}
memset(acd, 0x66, sizeof(struct aio_cb_data));
-
+
acd->priv = priv;
acd->ldev = priv->ldev;
acd->cpl = &done;
@@ -71,55 +74,55 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
acd->kcb = kcb;
acd->len = iov_len;
acd->page_count = count_pages(iov_base, iov_len);
-
+
// Allocate an array of page pointers
acd->user_pages = kzalloc(sizeof(struct page *) * acd->page_count, GFP_KERNEL);
- if (!acd->user_pages){
+ if (!acd->user_pages) {
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the page pointers\n");
rv = -ENOMEM;
goto err_alloc_userpages;
}
-
+
// Lock the user buffer pages in memory, and hold on to the page pointers (for the sglist)
down_read(¤t->mm->mmap_sem); /* get memory map semaphore */
rv = get_user_pages(iov_base, acd->page_count, FOLL_TOUCH | FOLL_WRITE | FOLL_GET, acd->user_pages, NULL);
up_read(¤t->mm->mmap_sem); /* release the semaphore */
- if (rv != acd->page_count){
+ if (rv != acd->page_count) {
dev_err(&priv->ldev->pldev->dev, "Couldn't get_user_pages (%ld)\n", rv);
goto err_get_user_pages;
}
-
+
// Allocate and setup the sg_table (scatterlist entries)
rv = sg_alloc_table_from_pages(&acd->sgt, acd->user_pages, acd->page_count, iov_base & (PAGE_SIZE-1), iov_len, GFP_KERNEL);
- if (rv){
+ if (rv) {
dev_err(&priv->ldev->pldev->dev, "Couldn't alloc sg_table (%ld)\n", rv);
goto err_alloc_sg_table;
}
-
+
// Setup the DMA mapping for all the sg entries
acd->mapped_entry_count = dma_map_sg(&ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, ldev->dir);
- if (acd->mapped_entry_count <= 0){
+ if (acd->mapped_entry_count <= 0) {
dev_err(&priv->ldev->pldev->dev, "Couldn't dma_map_sg (%d)\n", acd->mapped_entry_count);
goto err_dma_map_sg;
}
// Calculate how many descriptors are actually needed for this transfer.
- for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i){
+ for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i) {
desc_needed += count_parts_for_sge(sg);
}
-
+
lock_engine(ldev);
-
+
// Figoure out how many descriptors are available and return an error if there aren't enough
num_descrs_avail = count_descriptors_available(ldev);
dev_dbg(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
- if (desc_needed >= ldev->desc_pool_cnt){
+ if (desc_needed >= ldev->desc_pool_cnt) {
dev_warn(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d TOO MANY to ever complete!\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
rv = -EAGAIN;
unlock_engine(ldev);
goto err_descr_too_many;
}
- if (desc_needed > num_descrs_avail){
+ if (desc_needed > num_descrs_avail) {
dev_warn(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d Too many to complete right now.\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
rv = -EMSGSIZE;
unlock_engine(ldev);
@@ -129,69 +132,69 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
// Loop through all the sg table entries and fill out a descriptor for each one.
desc = ldev->desc_next;
card_addr = acd->priv->card_addr;
- for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i){
+ for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i) {
pcnt = count_parts_for_sge(sg);
- for (p = 0 ; p < pcnt ; p++){
+ for (p = 0 ; p < pcnt ; p++) {
// Fill out the descriptor
BUG_ON(desc == NULL);
clear_desc(desc);
- if (p != pcnt-1){
+ if (p != pcnt-1) {
desc->DescByteCount = 0x80000;
} else {
desc->DescByteCount = sg_dma_len(sg) - (p * 0x80000);
}
desc->DescBufferByteCount = desc->DescByteCount;
-
+
desc->DescControlFlags |= DMA_DESC_CTL_IRQONERR;
if (i == 0 && p == 0)
desc->DescControlFlags |= DMA_DESC_CTL_SOP;
if (i == acd->mapped_entry_count-1 && p == pcnt-1)
desc->DescControlFlags |= DMA_DESC_CTL_EOP | DMA_DESC_CTL_IRQONDONE;
-
+
desc->DescCardAddrLS = (card_addr & 0xFFFFFFFF);
desc->DescCardAddrMS = (card_addr >> 32) & 0xF;
card_addr += desc->DescByteCount;
-
+
dma_addr = sg_dma_address(sg) + (p * 0x80000);
desc->DescSystemAddrLS = (dma_addr & 0x00000000FFFFFFFF) >> 0;
desc->DescSystemAddrMS = (dma_addr & 0xFFFFFFFF00000000) >> 32;
-
+
user_ctl = acd->priv->user_ctl;
- if (i == acd->mapped_entry_count-1 && p == pcnt-1){
+ if (i == acd->mapped_entry_count-1 && p == pcnt-1) {
user_ctl = acd->priv->user_ctl_last;
}
desc->DescUserControlLS = (user_ctl & 0x00000000FFFFFFFF) >> 0;
desc->DescUserControlMS = (user_ctl & 0xFFFFFFFF00000000) >> 32;
-
+
if (i == acd->mapped_entry_count-1 && p == pcnt-1)
desc->acd = acd;
-
+
dev_dbg(&priv->ldev->pldev->dev, " Filled descriptor %p (acd = %p)\n", desc, desc->acd);
-
+
ldev->desc_next = desc->Next;
desc = desc->Next;
}
}
-
+
// Send the filled descriptors off to the hardware to process!
SetEngineSWPtr(ldev, ldev->desc_next);
-
+
unlock_engine(ldev);
-
+
// If this is a synchronous kiocb, we need to put the calling process to sleep until the transfer is complete
- if (kcb == NULL || is_sync_kiocb(kcb)){
+ if (kcb == NULL || is_sync_kiocb(kcb)) {
rv = wait_for_completion_interruptible(&done);
// If the user aborted (rv == -ERESTARTSYS), we're no longer responsible for cleaning up the acd
- if (rv == -ERESTARTSYS){
+ if (rv == -ERESTARTSYS)
acd->cpl = NULL;
- }
- if (rv == 0){
+
+ if (rv == 0) {
rv = acd->len;
kfree(acd);
}
return rv;
}
-
+
return -EIOCBQUEUED;
err_descr_too_many:
@@ -200,49 +203,48 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
sg_free_table(&acd->sgt);
err_dma_map_sg:
err_alloc_sg_table:
- for (i = 0 ; i < acd->page_count ; i++){
+ for (i = 0 ; i < acd->page_count ; i++) {
put_page(acd->user_pages[i]);
}
err_get_user_pages:
kfree(acd->user_pages);
err_alloc_userpages:
kfree(acd);
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer returning with error %ld\n", rv);
+ dev_dbg(&priv->ldev->pldev->dev, "%s returning with error %ld\n", __func__, rv);
return rv;
}
void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
{
unsigned int i;
-
+
BUG_ON(acd == NULL);
BUG_ON(acd->user_pages == NULL);
BUG_ON(acd->sgt.sgl == NULL);
BUG_ON(acd->ldev == NULL);
BUG_ON(acd->ldev->pldev == NULL);
-
- dev_dbg(&acd->ldev->pldev->dev, "transfer_complete_cb(acd = [%p])\n", acd);
-
- for (i = 0 ; i < acd->page_count ; i++){
- if (!PageReserved(acd->user_pages[i])){
+
+ dev_dbg(&acd->ldev->pldev->dev, "%s(acd = [%p])\n", __func__, acd);
+
+ for (i = 0 ; i < acd->page_count ; i++) {
+ if (!PageReserved(acd->user_pages[i]))
set_page_dirty(acd->user_pages[i]);
- }
}
-
+
dma_unmap_sg(&acd->ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, acd->ldev->dir);
-
- for (i = 0 ; i < acd->page_count ; i++){
+
+ for (i = 0 ; i < acd->page_count ; i++) {
put_page(acd->user_pages[i]);
}
-
+
sg_free_table(&acd->sgt);
-
+
kfree(acd->user_pages);
-
+
acd->flags = flags;
-
- if (acd->kcb == NULL || is_sync_kiocb(acd->kcb)){
- if (acd->cpl){
+
+ if (acd->kcb == NULL || is_sync_kiocb(acd->kcb)) {
+ if (acd->cpl) {
complete(acd->cpl);
} else {
// There's no completion, so we're responsible for cleaning up the acd
@@ -262,22 +264,23 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
{
struct dev_private_data *priv;
struct kpc_dma_device *ldev = kpc_dma_lookup_device(iminor(inode));
+
if (ldev == NULL)
return -ENODEV;
-
- if (! atomic_dec_and_test(&ldev->open_count)){
+
+ if (!atomic_dec_and_test(&ldev->open_count)) {
atomic_inc(&ldev->open_count);
return -EBUSY; /* already open */
}
-
+
priv = kzalloc(sizeof(struct dev_private_data), GFP_KERNEL);
if (!priv)
return -ENOMEM;
-
+
priv->ldev = ldev;
filp->private_data = priv;
-
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_open(inode = [%p], filp = [%p]) priv = [%p] ldev = [%p]\n", inode, filp, priv, priv->ldev);
+
+ dev_dbg(&priv->ldev->pldev->dev, "%s(inode = [%p], filp = [%p]) priv = [%p] ldev = [%p]\n", __func__, inode, filp, priv, priv->ldev);
return 0;
}
@@ -287,30 +290,30 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
struct kpc_dma_descriptor *cur;
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
struct kpc_dma_device *eng = priv->ldev;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_close(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", inode, filp, priv, priv->ldev);
-
+
+ dev_dbg(&priv->ldev->pldev->dev, "%s(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", __func__, inode, filp, priv, priv->ldev);
+
lock_engine(eng);
-
+
stop_dma_engine(eng);
-
+
cur = eng->desc_completed->Next;
- while (cur != eng->desc_next){
+ while (cur != eng->desc_next) {
dev_dbg(&eng->pldev->dev, "Aborting descriptor %p (acd = %p)\n", cur, cur->acd);
- if (cur->DescControlFlags & DMA_DESC_CTL_EOP){
+ if (cur->DescControlFlags & DMA_DESC_CTL_EOP) {
if (cur->acd)
transfer_complete_cb(cur->acd, 0, ACD_FLAG_ABORT);
}
-
+
clear_desc(cur);
eng->desc_completed = cur;
-
cur = cur->Next;
}
-
+
start_dma_engine(eng);
-
+
unlock_engine(eng);
-
+
atomic_inc(&priv->ldev->open_count); /* release the device */
kfree(priv);
return 0;
@@ -321,7 +324,8 @@ static
int kpc_dma_aio_cancel(struct kiocb *kcb)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_cancel(kcb = [%p]) priv = [%p], ldev = [%p]\n", kcb, priv, priv->ldev);
+
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p]) priv = [%p], ldev = [%p]\n", __func__, kcb, priv, priv->ldev);
return 0;
}
@@ -329,16 +333,17 @@ static
ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned long iov_count, loff_t pos)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_read(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
-
+
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", __func__, kcb, iov, iov_count, pos, priv, priv->ldev);
+
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
-
- if (iov_count != 1){
- dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_read() called with iov_count > 1!\n");
+
+ if (iov_count != 1) {
+ dev_err(&priv->ldev->pldev->dev, "%s() called with iov_count > 1!\n", __func__);
return -EFAULT;
}
-
+
if (!is_sync_kiocb(kcb))
kiocb_set_cancel_fn(kcb, kpc_dma_aio_cancel);
return kpc_dma_transfer(priv, kcb, (unsigned long)iov->iov_base, iov->iov_len);
@@ -348,16 +353,17 @@ static
ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned long iov_count, loff_t pos)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_write(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
-
+
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", __func__, kcb, iov, iov_count, pos, priv, priv->ldev);
+
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
-
- if (iov_count != 1){
- dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_write() called with iov_count > 1!\n");
+
+ if (iov_count != 1) {
+ dev_err(&priv->ldev->pldev->dev, "%s() called with iov_count > 1!\n", __func__);
return -EFAULT;
}
-
+
if (!is_sync_kiocb(kcb))
kiocb_set_cancel_fn(kcb, kpc_dma_aio_cancel);
return kpc_dma_transfer(priv, kcb, (unsigned long)iov->iov_base, iov->iov_len);
@@ -365,14 +371,15 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
#endif
static
-ssize_t kpc_dma_read( struct file *filp, char __user *user_buf, size_t count, loff_t *ppos)
+ssize_t kpc_dma_read(struct file *filp, char __user *user_buf, size_t count, loff_t *ppos)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
-
+
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", __func__, filp, user_buf, count, ppos, priv, priv->ldev);
+
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
-
+
return kpc_dma_transfer(priv, (struct kiocb *)NULL, (unsigned long)user_buf, count);
}
@@ -380,11 +387,12 @@ static
ssize_t kpc_dma_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *ppos)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_write(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
-
+
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", __func__, filp, user_buf, count, ppos, priv, priv->ldev);
+
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
-
+
return kpc_dma_transfer(priv, (struct kiocb *)NULL, (unsigned long)user_buf, count);
}
@@ -392,20 +400,24 @@ static
long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioctl_param)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
-
- switch (ioctl_num){
- case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
- case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
- case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
- case KND_IOCTL_GET_USER_STS: return priv->user_sts;
+
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", __func__, filp, ioctl_num, ioctl_param, priv, priv->ldev);
+
+ switch (ioctl_num) {
+ case KND_IOCTL_SET_CARD_ADDR:
+ priv->card_addr = ioctl_param; return priv->card_addr;
+ case KND_IOCTL_SET_USER_CTL:
+ priv->user_ctl = ioctl_param; return priv->user_ctl;
+ case KND_IOCTL_SET_USER_CTL_LAST:
+ priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
+ case KND_IOCTL_GET_USER_STS:
+ return priv->user_sts;
}
-
+
return -ENOTTY;
}
-
-struct file_operations kpc_dma_fops = {
+const struct file_operations kpc_dma_fops = {
.owner = THIS_MODULE,
.open = kpc_dma_open,
.release = kpc_dma_close,
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index aeae58d9bc18..bbbd617b0e71 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -14,36 +14,35 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("Matt.Sickler@daktronics.com");
#define KPC_DMA_CHAR_MAJOR UNNAMED_MAJOR
-#define KPC_DMA_NUM_MINORS 1 << MINORBITS
+#define KPC_DMA_NUM_MINORS (1 << MINORBITS)
static DEFINE_MUTEX(kpc_dma_mtx);
static int assigned_major_num;
static LIST_HEAD(kpc_dma_list);
-
/********** kpc_dma_list list management **********/
-struct kpc_dma_device * kpc_dma_lookup_device(int minor)
+struct kpc_dma_device *kpc_dma_lookup_device(int minor)
{
struct kpc_dma_device *c;
+
mutex_lock(&kpc_dma_mtx);
list_for_each_entry(c, &kpc_dma_list, list) {
- if (c->pldev->id == minor) {
+ if (c->pldev->id == minor)
goto out;
- }
}
c = NULL; // not-found case
- out:
+out:
mutex_unlock(&kpc_dma_mtx);
return c;
}
-void kpc_dma_add_device(struct kpc_dma_device * ldev)
+void kpc_dma_add_device(struct kpc_dma_device *ldev)
{
mutex_lock(&kpc_dma_mtx);
list_add(&ldev->list, &kpc_dma_list);
mutex_unlock(&kpc_dma_mtx);
}
-void kpc_dma_del_device(struct kpc_dma_device * ldev)
+void kpc_dma_del_device(struct kpc_dma_device *ldev)
{
mutex_lock(&kpc_dma_mtx);
list_del(&ldev->list);
@@ -55,11 +54,14 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
{
struct kpc_dma_device *ldev;
struct platform_device *pldev = to_platform_device(dev);
- if (!pldev) return 0;
+
+ if (!pldev)
+ return 0;
ldev = platform_get_drvdata(pldev);
- if (!ldev) return 0;
-
- return scnprintf(buf, PAGE_SIZE,
+ if (!ldev)
+ return 0;
+
+ return scnprintf(buf, PAGE_SIZE,
"EngineControlStatus = 0x%08x\n"
"RegNextDescPtr = 0x%08x\n"
"RegSWDescPtr = 0x%08x\n"
@@ -80,14 +82,13 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
}
DEVICE_ATTR(engine_regs, 0444, show_engine_regs, NULL);
-static const struct attribute * ndd_attr_list[] = {
+static const struct attribute *ndd_attr_list[] = {
&dev_attr_engine_regs.attr,
NULL,
};
struct class *kpc_dma_class;
-
/********** Platform Driver Functions **********/
static
int kpc_dma_probe(struct platform_device *pldev)
@@ -95,73 +96,73 @@ int kpc_dma_probe(struct platform_device *pldev)
struct resource *r = NULL;
int rv = 0;
dev_t dev;
-
+
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
- if (!ldev){
- dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
+ if (!ldev) {
+ dev_err(&pldev->dev, "%s: unable to kzalloc space for kpc_dma_device\n", __func__);
rv = -ENOMEM;
goto err_rv;
}
-
- dev_dbg(&pldev->dev, "kpc_dma_probe(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
-
+
+ dev_dbg(&pldev->dev, "%s(pldev = [%p]) ldev = [%p]\n", __func__, pldev, ldev);
+
INIT_LIST_HEAD(&ldev->list);
-
+
ldev->pldev = pldev;
platform_set_drvdata(pldev, ldev);
atomic_set(&ldev->open_count, 1);
-
+
mutex_init(&ldev->sem);
lock_engine(ldev);
-
+
// Get Engine regs resource
r = platform_get_resource(pldev, IORESOURCE_MEM, 0);
- if (!r){
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the engine regs resource!\n");
+ if (!r) {
+ dev_err(&ldev->pldev->dev, "%s: didn't get the engine regs resource!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
ldev->eng_regs = ioremap_nocache(r->start, resource_size(r));
- if (!ldev->eng_regs){
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to ioremap engine regs!\n");
+ if (!ldev->eng_regs) {
+ dev_err(&ldev->pldev->dev, "%s: failed to ioremap engine regs!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
-
+
r = platform_get_resource(pldev, IORESOURCE_IRQ, 0);
- if (!r){
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the IRQ resource!\n");
+ if (!r) {
+ dev_err(&ldev->pldev->dev, "%s: didn't get the IRQ resource!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
ldev->irq = r->start;
-
+
// Setup miscdev struct
dev = MKDEV(assigned_major_num, pldev->id);
ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
- if (IS_ERR(ldev->kpc_dma_dev)){
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: device_create failed: %d\n", rv);
+ if (IS_ERR(ldev->kpc_dma_dev)) {
+ dev_err(&ldev->pldev->dev, "%s: device_create failed: %d\n", __func__, rv);
goto err_kfree;
}
-
+
// Setup the DMA engine
rv = setup_dma_engine(ldev, 30);
- if (rv){
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to setup_dma_engine: %d\n", rv);
+ if (rv) {
+ dev_err(&ldev->pldev->dev, "%s: failed to setup_dma_engine: %d\n", __func__, rv);
goto err_misc_dereg;
}
-
+
// Setup the sysfs files
rv = sysfs_create_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
- if (rv){
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: Failed to add sysfs files: %d\n", rv);
+ if (rv) {
+ dev_err(&ldev->pldev->dev, "%s: Failed to add sysfs files: %d\n", __func__, rv);
goto err_destroy_eng;
}
-
+
kpc_dma_add_device(ldev);
-
+
return 0;
-
+
err_destroy_eng:
destroy_dma_engine(ldev);
err_misc_dereg:
@@ -176,22 +177,22 @@ static
int kpc_dma_remove(struct platform_device *pldev)
{
struct kpc_dma_device *ldev = platform_get_drvdata(pldev);
+
if (!ldev)
return -ENXIO;
-
- dev_dbg(&ldev->pldev->dev, "kpc_dma_remove(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
-
+
+ dev_dbg(&ldev->pldev->dev, "%s(pldev = [%p]) ldev = [%p]\n", __func__, pldev, ldev);
+
lock_engine(ldev);
sysfs_remove_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
destroy_dma_engine(ldev);
kpc_dma_del_device(ldev);
device_destroy(kpc_dma_class, MKDEV(assigned_major_num, ldev->pldev->id));
kfree(ldev);
-
+
return 0;
}
-
/********** Driver Functions **********/
struct platform_driver kpc_dma_plat_driver_i = {
.probe = kpc_dma_probe,
@@ -203,43 +204,43 @@ struct platform_driver kpc_dma_plat_driver_i = {
};
static
-int __init kpc_dma_driver_init(void)
+int __init kpc_dma_driver_init(void)
{
int err;
-
+
err = __register_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma", &kpc_dma_fops);
- if (err < 0){
+ if (err < 0) {
pr_err("Can't allocate a major number (%d) for kpc_dma (err = %d)\n", KPC_DMA_CHAR_MAJOR, err);
goto fail_chrdev_register;
}
assigned_major_num = err;
-
+
kpc_dma_class = class_create(THIS_MODULE, "kpc_dma");
err = PTR_ERR(kpc_dma_class);
- if (IS_ERR(kpc_dma_class)){
+ if (IS_ERR(kpc_dma_class)) {
pr_err("Can't create class kpc_dma (err = %d)\n", err);
goto fail_class_create;
}
-
+
err = platform_driver_register(&kpc_dma_plat_driver_i);
- if (err){
+ if (err) {
pr_err("Can't register platform driver for kpc_dma (err = %d)\n", err);
goto fail_platdriver_register;
}
-
+
return err;
-
- fail_platdriver_register:
+
+fail_platdriver_register:
class_destroy(kpc_dma_class);
- fail_class_create:
+fail_class_create:
__unregister_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma");
- fail_chrdev_register:
+fail_chrdev_register:
return err;
}
module_init(kpc_dma_driver_init);
static
-void __exit kpc_dma_driver_exit(void)
+void __exit kpc_dma_driver_exit(void)
{
platform_driver_unregister(&kpc_dma_plat_driver_i);
class_destroy(kpc_dma_class);
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index ef913b7496e6..89925af7b81e 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -27,23 +27,23 @@ struct kpc_dma_device {
struct device *kpc_dma_dev;
struct kobject kobj;
char name[16];
-
+
int dir; // DMA_FROM_DEVICE || DMA_TO_DEVICE
struct mutex sem;
unsigned int irq;
struct work_struct irq_work;
-
+
atomic_t open_count;
-
+
size_t accumulated_bytes;
u32 accumulated_flags;
-
+
// Descriptor "Pool" housekeeping
u32 desc_pool_cnt;
struct dma_pool *desc_pool;
struct kpc_dma_descriptor *desc_pool_first;
struct kpc_dma_descriptor *desc_pool_last;
-
+
struct kpc_dma_descriptor *desc_next;
struct kpc_dma_descriptor *desc_completed;
};
@@ -56,9 +56,9 @@ struct dev_private_data {
u64 user_sts;
};
-struct kpc_dma_device * kpc_dma_lookup_device(int minor);
+struct kpc_dma_device *kpc_dma_lookup_device(int minor);
-extern struct file_operations kpc_dma_fops;
+extern const struct file_operations kpc_dma_fops;
#define ENG_CAP_PRESENT 0x00000001
#define ENG_CAP_DIRECTION 0x00000002
@@ -90,7 +90,7 @@ struct aio_cb_data {
unsigned char flags;
struct kiocb *kcb;
size_t len;
-
+
unsigned int page_count;
struct page **user_pages;
struct sg_table sgt;
@@ -119,12 +119,13 @@ struct kpc_dma_descriptor {
volatile u32 DescSystemAddrLS;
volatile u32 DescSystemAddrMS;
volatile u32 DescNextDescPtr;
-
+
dma_addr_t MyDMAAddr;
struct kpc_dma_descriptor *Next;
-
+
struct aio_cb_data *acd;
} __attribute__((packed));
+
// DescControlFlags:
#define DMA_DESC_CTL_SOP BIT(7)
#define DMA_DESC_CTL_EOP BIT(6)
@@ -157,35 +158,41 @@ void WriteEngineControl(struct kpc_dma_device *eng, u32 value)
{
writel(value, eng->eng_regs + 1);
}
+
static inline
u32 GetEngineControl(struct kpc_dma_device *eng)
{
return readl(eng->eng_regs + 1);
}
+
static inline
void SetClearEngineControl(struct kpc_dma_device *eng, u32 set_bits, u32 clear_bits)
{
u32 val = GetEngineControl(eng);
+
val |= set_bits;
val &= ~clear_bits;
WriteEngineControl(eng, val);
}
static inline
-void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor * desc)
+void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
{
writel(desc->MyDMAAddr, eng->eng_regs + 2);
}
+
static inline
-void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor * desc)
+void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
{
writel(desc->MyDMAAddr, eng->eng_regs + 3);
}
+
static inline
void ClearEngineCompletePtr(struct kpc_dma_device *eng)
{
writel(0, eng->eng_regs + 4);
}
+
static inline
u32 GetEngineCompletePtr(struct kpc_dma_device *eng)
{
@@ -206,7 +213,6 @@ void unlock_engine(struct kpc_dma_device *eng)
mutex_unlock(&eng->sem);
}
-
/// Shared Functions
void start_dma_engine(struct kpc_dma_device *eng);
int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt);
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH] Staging: kpc2000: kpc_dma: resolve checkpath errors and warnings
2019-05-10 19:38 [PATCH] Staging: kpc2000: kpc_dma: resolve checkpath errors and warnings Vandana BN
@ 2019-05-10 20:34 ` Lukas Bulwahn
2019-05-12 15:48 ` Vandana BN
2019-05-11 6:04 ` Greg KH
` (3 subsequent siblings)
4 siblings, 1 reply; 32+ messages in thread
From: Lukas Bulwahn @ 2019-05-10 20:34 UTC (permalink / raw)
To: Vandana BN
Cc: Greg Kroah-Hartman, devel, Linux Kernel Mailing List,
linux-kernel-mentees
On Fri, May 10, 2019 at 9:39 PM Vandana BN <bnvandana@gmail.com> wrote:
>
> This patch resolves coding style errors and warnings reported by chechpatch
>
I did not look at the patch in detail, but you might want to also
consider to replace the CamlCase (function) names by names in
lower-case with underscores. That is the common style in the kernel.
Lukas
^ permalink raw reply [flat|nested] 32+ messages in thread
* Re: [PATCH] Staging: kpc2000: kpc_dma: resolve checkpath errors and warnings
2019-05-10 19:38 [PATCH] Staging: kpc2000: kpc_dma: resolve checkpath errors and warnings Vandana BN
2019-05-10 20:34 ` [Linux-kernel-mentees] " Lukas Bulwahn
@ 2019-05-11 6:04 ` Greg KH
2019-05-12 23:39 ` [PATCH v2 1/8] Staging: kpc2000: kpc_dma: resolve trailing whitespace error reported by checkpatch Vandana BN
` (2 subsequent siblings)
4 siblings, 0 replies; 32+ messages in thread
From: Greg KH @ 2019-05-11 6:04 UTC (permalink / raw)
To: Vandana BN; +Cc: devel, linux-kernel, linux-kernel-mentees, skhan
On Sat, May 11, 2019 at 01:08:33AM +0530, Vandana BN wrote:
> This patch resolves coding style errors and warnings reported by chechpatch
>
> ERROR: "(foo*)" should be "(foo *)"
> ERROR: trailing whitespace
> ERROR: space required before the open brace '{'
> ERROR: "foo * bar" should be "foo *bar"
> ERROR: space prohibited after that '!' (ctx:BxW)
> ERROR: space prohibited after that open parenthesis '('
> ERROR: switch and case should be at the same indent
> ERROR: trailing statements should be on next line
> ERROR: Macros with complex values should be enclosed in parentheses
> ERROR: "foo __init bar" should be "foo __init bar"
> ERROR: "foo __exit bar" should be "foo __exit bar"
> WARNING: Missing a blank line after declarations
> WARNING: Prefer using '"%s...", __func__' to using function's name, in a string
> WARNING: braces {} are not necessary for any arm of this statement
> WARNING: unnecessary cast may hide bugs
> WARNING: braces {} are not necessary for single statement
> WARNING: struct file_operations should normally be const
> WARNING: labels should not be indented
> Signed-off-by: Vandana BN <bnvandana@gmail.com>
> ---
> drivers/staging/kpc2000/kpc_dma/dma.c | 137 +++++------
> drivers/staging/kpc2000/kpc_dma/fileops.c | 220 +++++++++---------
> .../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 121 +++++-----
> .../staging/kpc2000/kpc_dma/kpc_dma_driver.h | 32 +--
> 4 files changed, 265 insertions(+), 245 deletions(-)
>
Hi,
This is the friendly patch-bot of Greg Kroah-Hartman. You have sent him
a patch that has triggered this response. He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created. Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.
You are receiving this message because of the following common error(s)
as indicated below:
- Your patch did many different things all at once, making it difficult
to review. All Linux kernel patches need to only do one thing at a
time. If you need to do multiple things (such as clean up all coding
style issues in a file/driver), do it in a sequence of patches, each
one doing only one thing. This will make it easier to review the
patches to ensure that they are correct, and to help alleviate any
merge issues that larger patches can cause.
If you wish to discuss this problem further, or you have questions about
how to resolve this issue, please feel free to respond to this email and
Greg will reply once he has dug out from the pending patches received
from other developers.
thanks,
greg k-h's patch email bot
^ permalink raw reply [flat|nested] 32+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH] Staging: kpc2000: kpc_dma: resolve checkpath errors and warnings
2019-05-10 20:34 ` [Linux-kernel-mentees] " Lukas Bulwahn
@ 2019-05-12 15:48 ` Vandana BN
0 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-12 15:48 UTC (permalink / raw)
To: Lukas Bulwahn
Cc: Greg Kroah-Hartman, devel, Linux Kernel Mailing List,
linux-kernel-mentees
On 11/05/19 2:04 AM, Lukas Bulwahn wrote:
> On Fri, May 10, 2019 at 9:39 PM Vandana BN <bnvandana@gmail.com> wrote:
>> This patch resolves coding style errors and warnings reported by chechpatch
>>
> I did not look at the patch in detail, but you might want to also
> consider to replace the CamlCase (function) names by names in
> lower-case with underscores. That is the common style in the kernel.
>
> Lukas
With this path I wanted to fix Error and warning reported by checkpatch.pl
Is it ok if i do CamlCase fixes as separate patch than this ?
thanks,
Vandana.
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH v2 1/8] Staging: kpc2000: kpc_dma: resolve trailing whitespace error reported by checkpatch
2019-05-10 19:38 [PATCH] Staging: kpc2000: kpc_dma: resolve checkpath errors and warnings Vandana BN
2019-05-10 20:34 ` [Linux-kernel-mentees] " Lukas Bulwahn
2019-05-11 6:04 ` Greg KH
@ 2019-05-12 23:39 ` Vandana BN
2019-05-12 23:39 ` [PATCH v2 2/8] Staging: kpc2000: kpc_dma: Resolve coding style errors " Vandana BN
` (6 more replies)
2019-05-13 10:26 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error " Vandana BN
2019-05-13 13:43 ` [PATCH v4 " Vandana BN
4 siblings, 7 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-12 23:39 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
Resolve trailing whitespace error from checkpatch.pl
ERROR: trailing whitespace
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/dma.c | 86 ++++++-------
drivers/staging/kpc2000/kpc_dma/fileops.c | 114 +++++++++---------
.../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 46 +++----
.../staging/kpc2000/kpc_dma/kpc_dma_driver.h | 16 +--
4 files changed, 131 insertions(+), 131 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index 6959bac11388..ba987307d898 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -15,10 +15,10 @@ static
irqreturn_t ndd_irq_handler(int irq, void *dev_id)
{
struct kpc_dma_device *ldev = (struct kpc_dma_device*)dev_id;
-
+
if ((GetEngineControl(ldev) & ENG_CTL_IRQ_ACTIVE) || (ldev->desc_completed->MyDMAAddr != GetEngineCompletePtr(ldev)))
schedule_work(&ldev->irq_work);
-
+
return IRQ_HANDLED;
}
@@ -28,42 +28,42 @@ void ndd_irq_worker(struct work_struct *ws)
struct kpc_dma_descriptor *cur;
struct kpc_dma_device *eng = container_of(ws, struct kpc_dma_device, irq_work);
lock_engine(eng);
-
+
if (GetEngineCompletePtr(eng) == 0)
goto out;
-
+
if (eng->desc_completed->MyDMAAddr == GetEngineCompletePtr(eng))
goto out;
-
+
cur = eng->desc_completed;
do {
cur = cur->Next;
dev_dbg(&eng->pldev->dev, "Handling completed descriptor %p (acd = %p)\n", cur, cur->acd);
BUG_ON(cur == eng->desc_next); // Ordering failure.
-
+
if (cur->DescControlFlags & DMA_DESC_CTL_SOP){
eng->accumulated_bytes = 0;
eng->accumulated_flags = 0;
}
-
+
eng->accumulated_bytes += cur->DescByteCount;
if (cur->DescStatusFlags & DMA_DESC_STS_ERROR)
eng->accumulated_flags |= ACD_FLAG_ENG_ACCUM_ERROR;
-
+
if (cur->DescStatusFlags & DMA_DESC_STS_SHORT)
eng->accumulated_flags |= ACD_FLAG_ENG_ACCUM_SHORT;
-
+
if (cur->DescControlFlags & DMA_DESC_CTL_EOP){
if (cur->acd)
transfer_complete_cb(cur->acd, eng->accumulated_bytes, eng->accumulated_flags | ACD_FLAG_DONE);
}
-
+
eng->desc_completed = cur;
} while (cur->MyDMAAddr != GetEngineCompletePtr(eng));
-
+
out:
SetClearEngineControl(eng, ENG_CTL_IRQ_ACTIVE, 0);
-
+
unlock_engine(eng);
}
@@ -73,12 +73,12 @@ void start_dma_engine(struct kpc_dma_device *eng)
{
eng->desc_next = eng->desc_pool_first;
eng->desc_completed = eng->desc_pool_last;
-
+
// Setup the engine pointer registers
SetEngineNextPtr(eng, eng->desc_pool_first);
SetEngineSWPtr(eng, eng->desc_pool_first);
ClearEngineCompletePtr(eng);
-
+
WriteEngineControl(eng, ENG_CTL_DMA_ENABLE | ENG_CTL_IRQ_ENABLE);
}
@@ -92,67 +92,67 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
unsigned int i;
int rv;
dev_dbg(&eng->pldev->dev, "Setting up DMA engine [%p]\n", eng);
-
+
caps = GetEngineCapabilities(eng);
-
+
if (WARN(!(caps & ENG_CAP_PRESENT), "setup_dma_engine() called for DMA Engine at %p which isn't present in hardware!\n", eng))
return -ENXIO;
-
+
if (caps & ENG_CAP_DIRECTION){
eng->dir = DMA_FROM_DEVICE;
} else {
eng->dir = DMA_TO_DEVICE;
}
-
+
eng->desc_pool_cnt = desc_cnt;
eng->desc_pool = dma_pool_create("KPC DMA Descriptors", &eng->pldev->dev, sizeof(struct kpc_dma_descriptor), DMA_DESC_ALIGNMENT, 4096);
-
+
eng->desc_pool_first = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &head_handle);
if (!eng->desc_pool_first){
dev_err(&eng->pldev->dev, "setup_dma_engine: couldn't allocate desc_pool_first!\n");
dma_pool_destroy(eng->desc_pool);
return -ENOMEM;
}
-
+
eng->desc_pool_first->MyDMAAddr = head_handle;
clear_desc(eng->desc_pool_first);
-
+
cur = eng->desc_pool_first;
for (i = 1 ; i < eng->desc_pool_cnt ; i++){
next = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &next_handle);
if (next == NULL)
goto done_alloc;
-
+
clear_desc(next);
next->MyDMAAddr = next_handle;
-
+
cur->DescNextDescPtr = next_handle;
cur->Next = next;
cur = next;
}
-
+
done_alloc:
// Link the last descriptor back to the first, so it's a circular linked list
cur->Next = eng->desc_pool_first;
cur->DescNextDescPtr = eng->desc_pool_first->MyDMAAddr;
-
+
eng->desc_pool_last = cur;
eng->desc_completed = eng->desc_pool_last;
-
+
// Setup work queue
INIT_WORK(&eng->irq_work, ndd_irq_worker);
-
+
// Grab IRQ line
rv = request_irq(eng->irq, ndd_irq_handler, IRQF_SHARED, KP_DRIVER_NAME_DMA_CONTROLLER, eng);
if (rv){
dev_err(&eng->pldev->dev, "setup_dma_engine: failed to request_irq: %d\n", rv);
return rv;
}
-
+
// Turn on the engine!
start_dma_engine(eng);
unlock_engine(eng);
-
+
return 0;
}
@@ -160,10 +160,10 @@ void stop_dma_engine(struct kpc_dma_device *eng)
{
unsigned long timeout;
dev_dbg(&eng->pldev->dev, "Destroying DMA engine [%p]\n", eng);
-
+
// Disable the descriptor engine
WriteEngineControl(eng, 0);
-
+
// Wait for descriptor engine to finish current operaion
timeout = jiffies + (HZ / 2);
while (GetEngineControl(eng) & ENG_CTL_DMA_RUNNING){
@@ -172,10 +172,10 @@ void stop_dma_engine(struct kpc_dma_device *eng)
break;
}
}
-
+
// Request a reset
WriteEngineControl(eng, ENG_CTL_DMA_RESET_REQUEST);
-
+
// Wait for reset request to be processed
timeout = jiffies + (HZ / 2);
while (GetEngineControl(eng) & (ENG_CTL_DMA_RUNNING | ENG_CTL_DMA_RESET_REQUEST)){
@@ -184,10 +184,10 @@ void stop_dma_engine(struct kpc_dma_device *eng)
break;
}
}
-
+
// Request a reset
WriteEngineControl(eng, ENG_CTL_DMA_RESET);
-
+
// And wait for reset to complete
timeout = jiffies + (HZ / 2);
while (GetEngineControl(eng) & ENG_CTL_DMA_RESET){
@@ -196,12 +196,12 @@ void stop_dma_engine(struct kpc_dma_device *eng)
break;
}
}
-
+
// Clear any persistent bits just to make sure there is no residue from the reset
SetClearEngineControl(eng, (ENG_CTL_IRQ_ACTIVE | ENG_CTL_DESC_COMPLETE | ENG_CTL_DESC_ALIGN_ERR | ENG_CTL_DESC_FETCH_ERR | ENG_CTL_SW_ABORT_ERR | ENG_CTL_DESC_CHAIN_END | ENG_CTL_DMA_WAITING_PERSIST), 0);
-
+
// Reset performance counters
-
+
// Completely disable the engine
WriteEngineControl(eng, 0);
}
@@ -211,12 +211,12 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
struct kpc_dma_descriptor * cur;
dma_addr_t cur_handle;
unsigned int i;
-
+
stop_dma_engine(eng);
-
+
cur = eng->desc_pool_first;
cur_handle = eng->desc_pool_first->MyDMAAddr;
-
+
for (i = 0 ; i < eng->desc_pool_cnt ; i++){
struct kpc_dma_descriptor *next = cur->Next;
dma_addr_t next_handle = cur->DescNextDescPtr;
@@ -224,9 +224,9 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
cur_handle = next_handle;
cur = next;
}
-
+
dma_pool_destroy(eng->desc_pool);
-
+
free_irq(eng->irq, eng);
}
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 5741d2b49a7d..6c38c3f978c3 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -50,20 +50,20 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
u64 card_addr;
u64 dma_addr;
u64 user_ctl;
-
+
BUG_ON(priv == NULL);
ldev = priv->ldev;
BUG_ON(ldev == NULL);
-
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void*)iov_base, iov_len, ldev);
-
+
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd){
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the aio data\n");
return -ENOMEM;
}
memset(acd, 0x66, sizeof(struct aio_cb_data));
-
+
acd->priv = priv;
acd->ldev = priv->ldev;
acd->cpl = &done;
@@ -71,7 +71,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
acd->kcb = kcb;
acd->len = iov_len;
acd->page_count = count_pages(iov_base, iov_len);
-
+
// Allocate an array of page pointers
acd->user_pages = kzalloc(sizeof(struct page *) * acd->page_count, GFP_KERNEL);
if (!acd->user_pages){
@@ -79,7 +79,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
rv = -ENOMEM;
goto err_alloc_userpages;
}
-
+
// Lock the user buffer pages in memory, and hold on to the page pointers (for the sglist)
down_read(¤t->mm->mmap_sem); /* get memory map semaphore */
rv = get_user_pages(iov_base, acd->page_count, FOLL_TOUCH | FOLL_WRITE | FOLL_GET, acd->user_pages, NULL);
@@ -88,14 +88,14 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
dev_err(&priv->ldev->pldev->dev, "Couldn't get_user_pages (%ld)\n", rv);
goto err_get_user_pages;
}
-
+
// Allocate and setup the sg_table (scatterlist entries)
rv = sg_alloc_table_from_pages(&acd->sgt, acd->user_pages, acd->page_count, iov_base & (PAGE_SIZE-1), iov_len, GFP_KERNEL);
if (rv){
dev_err(&priv->ldev->pldev->dev, "Couldn't alloc sg_table (%ld)\n", rv);
goto err_alloc_sg_table;
}
-
+
// Setup the DMA mapping for all the sg entries
acd->mapped_entry_count = dma_map_sg(&ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, ldev->dir);
if (acd->mapped_entry_count <= 0){
@@ -107,9 +107,9 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i){
desc_needed += count_parts_for_sge(sg);
}
-
+
lock_engine(ldev);
-
+
// Figoure out how many descriptors are available and return an error if there aren't enough
num_descrs_avail = count_descriptors_available(ldev);
dev_dbg(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
@@ -141,43 +141,43 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
desc->DescByteCount = sg_dma_len(sg) - (p * 0x80000);
}
desc->DescBufferByteCount = desc->DescByteCount;
-
+
desc->DescControlFlags |= DMA_DESC_CTL_IRQONERR;
if (i == 0 && p == 0)
desc->DescControlFlags |= DMA_DESC_CTL_SOP;
if (i == acd->mapped_entry_count-1 && p == pcnt-1)
desc->DescControlFlags |= DMA_DESC_CTL_EOP | DMA_DESC_CTL_IRQONDONE;
-
+
desc->DescCardAddrLS = (card_addr & 0xFFFFFFFF);
desc->DescCardAddrMS = (card_addr >> 32) & 0xF;
card_addr += desc->DescByteCount;
-
+
dma_addr = sg_dma_address(sg) + (p * 0x80000);
desc->DescSystemAddrLS = (dma_addr & 0x00000000FFFFFFFF) >> 0;
desc->DescSystemAddrMS = (dma_addr & 0xFFFFFFFF00000000) >> 32;
-
+
user_ctl = acd->priv->user_ctl;
if (i == acd->mapped_entry_count-1 && p == pcnt-1){
user_ctl = acd->priv->user_ctl_last;
}
desc->DescUserControlLS = (user_ctl & 0x00000000FFFFFFFF) >> 0;
desc->DescUserControlMS = (user_ctl & 0xFFFFFFFF00000000) >> 32;
-
+
if (i == acd->mapped_entry_count-1 && p == pcnt-1)
desc->acd = acd;
-
+
dev_dbg(&priv->ldev->pldev->dev, " Filled descriptor %p (acd = %p)\n", desc, desc->acd);
-
+
ldev->desc_next = desc->Next;
desc = desc->Next;
}
}
-
+
// Send the filled descriptors off to the hardware to process!
SetEngineSWPtr(ldev, ldev->desc_next);
-
+
unlock_engine(ldev);
-
+
// If this is a synchronous kiocb, we need to put the calling process to sleep until the transfer is complete
if (kcb == NULL || is_sync_kiocb(kcb)){
rv = wait_for_completion_interruptible(&done);
@@ -191,7 +191,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
}
return rv;
}
-
+
return -EIOCBQUEUED;
err_descr_too_many:
@@ -214,33 +214,33 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
{
unsigned int i;
-
+
BUG_ON(acd == NULL);
BUG_ON(acd->user_pages == NULL);
BUG_ON(acd->sgt.sgl == NULL);
BUG_ON(acd->ldev == NULL);
BUG_ON(acd->ldev->pldev == NULL);
-
+
dev_dbg(&acd->ldev->pldev->dev, "transfer_complete_cb(acd = [%p])\n", acd);
-
+
for (i = 0 ; i < acd->page_count ; i++){
if (!PageReserved(acd->user_pages[i])){
set_page_dirty(acd->user_pages[i]);
}
}
-
+
dma_unmap_sg(&acd->ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, acd->ldev->dir);
-
+
for (i = 0 ; i < acd->page_count ; i++){
put_page(acd->user_pages[i]);
}
-
+
sg_free_table(&acd->sgt);
-
+
kfree(acd->user_pages);
-
+
acd->flags = flags;
-
+
if (acd->kcb == NULL || is_sync_kiocb(acd->kcb)){
if (acd->cpl){
complete(acd->cpl);
@@ -264,19 +264,19 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
struct kpc_dma_device *ldev = kpc_dma_lookup_device(iminor(inode));
if (ldev == NULL)
return -ENODEV;
-
+
if (! atomic_dec_and_test(&ldev->open_count)){
atomic_inc(&ldev->open_count);
return -EBUSY; /* already open */
}
-
+
priv = kzalloc(sizeof(struct dev_private_data), GFP_KERNEL);
if (!priv)
return -ENOMEM;
-
+
priv->ldev = ldev;
filp->private_data = priv;
-
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_open(inode = [%p], filp = [%p]) priv = [%p] ldev = [%p]\n", inode, filp, priv, priv->ldev);
return 0;
}
@@ -288,11 +288,11 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
struct kpc_dma_device *eng = priv->ldev;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_close(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", inode, filp, priv, priv->ldev);
-
+
lock_engine(eng);
-
+
stop_dma_engine(eng);
-
+
cur = eng->desc_completed->Next;
while (cur != eng->desc_next){
dev_dbg(&eng->pldev->dev, "Aborting descriptor %p (acd = %p)\n", cur, cur->acd);
@@ -300,17 +300,17 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
if (cur->acd)
transfer_complete_cb(cur->acd, 0, ACD_FLAG_ABORT);
}
-
+
clear_desc(cur);
eng->desc_completed = cur;
-
+
cur = cur->Next;
}
-
+
start_dma_engine(eng);
-
+
unlock_engine(eng);
-
+
atomic_inc(&priv->ldev->open_count); /* release the device */
kfree(priv);
return 0;
@@ -330,15 +330,15 @@ ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_read(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
-
+
if (iov_count != 1){
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_read() called with iov_count > 1!\n");
return -EFAULT;
}
-
+
if (!is_sync_kiocb(kcb))
kiocb_set_cancel_fn(kcb, kpc_dma_aio_cancel);
return kpc_dma_transfer(priv, kcb, (unsigned long)iov->iov_base, iov->iov_len);
@@ -349,15 +349,15 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_write(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
-
+
if (iov_count != 1){
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_write() called with iov_count > 1!\n");
return -EFAULT;
}
-
+
if (!is_sync_kiocb(kcb))
kiocb_set_cancel_fn(kcb, kpc_dma_aio_cancel);
return kpc_dma_transfer(priv, kcb, (unsigned long)iov->iov_base, iov->iov_len);
@@ -369,10 +369,10 @@ ssize_t kpc_dma_read( struct file *filp, char __user *user_buf, size_t co
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
-
+
return kpc_dma_transfer(priv, (struct kiocb *)NULL, (unsigned long)user_buf, count);
}
@@ -381,10 +381,10 @@ ssize_t kpc_dma_write(struct file *filp, const char __user *user_buf, size_t co
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_write(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
-
+
return kpc_dma_transfer(priv, (struct kiocb *)NULL, (unsigned long)user_buf, count);
}
@@ -393,14 +393,14 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
-
+
switch (ioctl_num){
- case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
- case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
- case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
+ case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
+ case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
+ case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
case KND_IOCTL_GET_USER_STS: return priv->user_sts;
}
-
+
return -ENOTTY;
}
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index aeae58d9bc18..dece60e6e3f3 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -58,8 +58,8 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
if (!pldev) return 0;
ldev = platform_get_drvdata(pldev);
if (!ldev) return 0;
-
- return scnprintf(buf, PAGE_SIZE,
+
+ return scnprintf(buf, PAGE_SIZE,
"EngineControlStatus = 0x%08x\n"
"RegNextDescPtr = 0x%08x\n"
"RegSWDescPtr = 0x%08x\n"
@@ -95,25 +95,25 @@ int kpc_dma_probe(struct platform_device *pldev)
struct resource *r = NULL;
int rv = 0;
dev_t dev;
-
+
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
if (!ldev){
dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
rv = -ENOMEM;
goto err_rv;
}
-
+
dev_dbg(&pldev->dev, "kpc_dma_probe(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
-
+
INIT_LIST_HEAD(&ldev->list);
-
+
ldev->pldev = pldev;
platform_set_drvdata(pldev, ldev);
atomic_set(&ldev->open_count, 1);
-
+
mutex_init(&ldev->sem);
lock_engine(ldev);
-
+
// Get Engine regs resource
r = platform_get_resource(pldev, IORESOURCE_MEM, 0);
if (!r){
@@ -127,7 +127,7 @@ int kpc_dma_probe(struct platform_device *pldev)
rv = -ENXIO;
goto err_kfree;
}
-
+
r = platform_get_resource(pldev, IORESOURCE_IRQ, 0);
if (!r){
dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the IRQ resource!\n");
@@ -135,7 +135,7 @@ int kpc_dma_probe(struct platform_device *pldev)
goto err_kfree;
}
ldev->irq = r->start;
-
+
// Setup miscdev struct
dev = MKDEV(assigned_major_num, pldev->id);
ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
@@ -143,25 +143,25 @@ int kpc_dma_probe(struct platform_device *pldev)
dev_err(&ldev->pldev->dev, "kpc_dma_probe: device_create failed: %d\n", rv);
goto err_kfree;
}
-
+
// Setup the DMA engine
rv = setup_dma_engine(ldev, 30);
if (rv){
dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to setup_dma_engine: %d\n", rv);
goto err_misc_dereg;
}
-
+
// Setup the sysfs files
rv = sysfs_create_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
if (rv){
dev_err(&ldev->pldev->dev, "kpc_dma_probe: Failed to add sysfs files: %d\n", rv);
goto err_destroy_eng;
}
-
+
kpc_dma_add_device(ldev);
-
+
return 0;
-
+
err_destroy_eng:
destroy_dma_engine(ldev);
err_misc_dereg:
@@ -178,16 +178,16 @@ int kpc_dma_remove(struct platform_device *pldev)
struct kpc_dma_device *ldev = platform_get_drvdata(pldev);
if (!ldev)
return -ENXIO;
-
+
dev_dbg(&ldev->pldev->dev, "kpc_dma_remove(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
-
+
lock_engine(ldev);
sysfs_remove_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
destroy_dma_engine(ldev);
kpc_dma_del_device(ldev);
device_destroy(kpc_dma_class, MKDEV(assigned_major_num, ldev->pldev->id));
kfree(ldev);
-
+
return 0;
}
@@ -206,29 +206,29 @@ static
int __init kpc_dma_driver_init(void)
{
int err;
-
+
err = __register_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma", &kpc_dma_fops);
if (err < 0){
pr_err("Can't allocate a major number (%d) for kpc_dma (err = %d)\n", KPC_DMA_CHAR_MAJOR, err);
goto fail_chrdev_register;
}
assigned_major_num = err;
-
+
kpc_dma_class = class_create(THIS_MODULE, "kpc_dma");
err = PTR_ERR(kpc_dma_class);
if (IS_ERR(kpc_dma_class)){
pr_err("Can't create class kpc_dma (err = %d)\n", err);
goto fail_class_create;
}
-
+
err = platform_driver_register(&kpc_dma_plat_driver_i);
if (err){
pr_err("Can't register platform driver for kpc_dma (err = %d)\n", err);
goto fail_platdriver_register;
}
-
+
return err;
-
+
fail_platdriver_register:
class_destroy(kpc_dma_class);
fail_class_create:
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index ef913b7496e6..67c0ea31acab 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -27,23 +27,23 @@ struct kpc_dma_device {
struct device *kpc_dma_dev;
struct kobject kobj;
char name[16];
-
+
int dir; // DMA_FROM_DEVICE || DMA_TO_DEVICE
struct mutex sem;
unsigned int irq;
struct work_struct irq_work;
-
+
atomic_t open_count;
-
+
size_t accumulated_bytes;
u32 accumulated_flags;
-
+
// Descriptor "Pool" housekeeping
u32 desc_pool_cnt;
struct dma_pool *desc_pool;
struct kpc_dma_descriptor *desc_pool_first;
struct kpc_dma_descriptor *desc_pool_last;
-
+
struct kpc_dma_descriptor *desc_next;
struct kpc_dma_descriptor *desc_completed;
};
@@ -90,7 +90,7 @@ struct aio_cb_data {
unsigned char flags;
struct kiocb *kcb;
size_t len;
-
+
unsigned int page_count;
struct page **user_pages;
struct sg_table sgt;
@@ -119,10 +119,10 @@ struct kpc_dma_descriptor {
volatile u32 DescSystemAddrLS;
volatile u32 DescSystemAddrMS;
volatile u32 DescNextDescPtr;
-
+
dma_addr_t MyDMAAddr;
struct kpc_dma_descriptor *Next;
-
+
struct aio_cb_data *acd;
} __attribute__((packed));
// DescControlFlags:
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v2 2/8] Staging: kpc2000: kpc_dma: Resolve coding style errors reported by checkpatch.
2019-05-12 23:39 ` [PATCH v2 1/8] Staging: kpc2000: kpc_dma: resolve trailing whitespace error reported by checkpatch Vandana BN
@ 2019-05-12 23:39 ` Vandana BN
2019-05-13 8:42 ` Greg KH
2019-05-12 23:39 ` [PATCH v2 3/8] " Vandana BN
` (5 subsequent siblings)
6 siblings, 1 reply; 32+ messages in thread
From: Vandana BN @ 2019-05-12 23:39 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resolves below errors reported by checkpatch
ERROR: "(foo*)" should be "(foo *)"
ERROR: "foo * bar" should be "foo *bar"
ERROR: "foo __init bar" should be "foo __init bar"
ERROR: "foo __exit bar" should be "foo __exit bar"
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/dma.c | 8 ++++----
drivers/staging/kpc2000/kpc_dma/fileops.c | 2 +-
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c | 12 ++++++------
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h | 6 +++---
4 files changed, 14 insertions(+), 14 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index ba987307d898..488b9b81debc 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -14,7 +14,7 @@
static
irqreturn_t ndd_irq_handler(int irq, void *dev_id)
{
- struct kpc_dma_device *ldev = (struct kpc_dma_device*)dev_id;
+ struct kpc_dma_device *ldev = (struct kpc_dma_device *)dev_id;
if ((GetEngineControl(ldev) & ENG_CTL_IRQ_ACTIVE) || (ldev->desc_completed->MyDMAAddr != GetEngineCompletePtr(ldev)))
schedule_work(&ldev->irq_work);
@@ -85,8 +85,8 @@ void start_dma_engine(struct kpc_dma_device *eng)
int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
{
u32 caps;
- struct kpc_dma_descriptor * cur;
- struct kpc_dma_descriptor * next;
+ struct kpc_dma_descriptor *cur;
+ struct kpc_dma_descriptor *next;
dma_addr_t next_handle;
dma_addr_t head_handle;
unsigned int i;
@@ -208,7 +208,7 @@ void stop_dma_engine(struct kpc_dma_device *eng)
void destroy_dma_engine(struct kpc_dma_device *eng)
{
- struct kpc_dma_descriptor * cur;
+ struct kpc_dma_descriptor *cur;
dma_addr_t cur_handle;
unsigned int i;
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 6c38c3f978c3..61927b313a26 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -55,7 +55,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
ldev = priv->ldev;
BUG_ON(ldev == NULL);
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void*)iov_base, iov_len, ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void *)iov_base, iov_len, ldev);
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd){
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index dece60e6e3f3..004d91b5ad00 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -21,7 +21,7 @@ static LIST_HEAD(kpc_dma_list);
/********** kpc_dma_list list management **********/
-struct kpc_dma_device * kpc_dma_lookup_device(int minor)
+struct kpc_dma_device *kpc_dma_lookup_device(int minor)
{
struct kpc_dma_device *c;
mutex_lock(&kpc_dma_mtx);
@@ -36,14 +36,14 @@ struct kpc_dma_device * kpc_dma_lookup_device(int minor)
return c;
}
-void kpc_dma_add_device(struct kpc_dma_device * ldev)
+void kpc_dma_add_device(struct kpc_dma_device *ldev)
{
mutex_lock(&kpc_dma_mtx);
list_add(&ldev->list, &kpc_dma_list);
mutex_unlock(&kpc_dma_mtx);
}
-void kpc_dma_del_device(struct kpc_dma_device * ldev)
+void kpc_dma_del_device(struct kpc_dma_device *ldev)
{
mutex_lock(&kpc_dma_mtx);
list_del(&ldev->list);
@@ -80,7 +80,7 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
}
DEVICE_ATTR(engine_regs, 0444, show_engine_regs, NULL);
-static const struct attribute * ndd_attr_list[] = {
+static const struct attribute *ndd_attr_list[] = {
&dev_attr_engine_regs.attr,
NULL,
};
@@ -203,7 +203,7 @@ struct platform_driver kpc_dma_plat_driver_i = {
};
static
-int __init kpc_dma_driver_init(void)
+int __init kpc_dma_driver_init(void)
{
int err;
@@ -239,7 +239,7 @@ int __init kpc_dma_driver_init(void)
module_init(kpc_dma_driver_init);
static
-void __exit kpc_dma_driver_exit(void)
+void __exit kpc_dma_driver_exit(void)
{
platform_driver_unregister(&kpc_dma_plat_driver_i);
class_destroy(kpc_dma_class);
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index 67c0ea31acab..8101601736a2 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -56,7 +56,7 @@ struct dev_private_data {
u64 user_sts;
};
-struct kpc_dma_device * kpc_dma_lookup_device(int minor);
+struct kpc_dma_device *kpc_dma_lookup_device(int minor);
extern struct file_operations kpc_dma_fops;
@@ -172,12 +172,12 @@ void SetClearEngineControl(struct kpc_dma_device *eng, u32 set_bits, u32 clear_
}
static inline
-void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor * desc)
+void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
{
writel(desc->MyDMAAddr, eng->eng_regs + 2);
}
static inline
-void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor * desc)
+void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
{
writel(desc->MyDMAAddr, eng->eng_regs + 3);
}
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v2 3/8] Staging: kpc2000: kpc_dma: Resolve coding style errors reported by checkpatch
2019-05-12 23:39 ` [PATCH v2 1/8] Staging: kpc2000: kpc_dma: resolve trailing whitespace error reported by checkpatch Vandana BN
2019-05-12 23:39 ` [PATCH v2 2/8] Staging: kpc2000: kpc_dma: Resolve coding style errors " Vandana BN
@ 2019-05-12 23:39 ` Vandana BN
2019-05-12 23:39 ` [PATCH v2 4/8] Staging: kpc2000: kpc_dma: Resolve code indent error " Vandana BN
` (4 subsequent siblings)
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-12 23:39 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resolves below errors reported by checkpath
ERROR: space required before the open brace '{'
ERROR: space prohibited after that '!' (ctx:BxW)
ERROR: space prohibited after that open parenthesis '('
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/dma.c | 28 +++++-----
drivers/staging/kpc2000/kpc_dma/fileops.c | 56 +++++++++----------
.../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 20 +++----
3 files changed, 52 insertions(+), 52 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index 488b9b81debc..2053316009bc 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -41,7 +41,7 @@ void ndd_irq_worker(struct work_struct *ws)
dev_dbg(&eng->pldev->dev, "Handling completed descriptor %p (acd = %p)\n", cur, cur->acd);
BUG_ON(cur == eng->desc_next); // Ordering failure.
- if (cur->DescControlFlags & DMA_DESC_CTL_SOP){
+ if (cur->DescControlFlags & DMA_DESC_CTL_SOP) {
eng->accumulated_bytes = 0;
eng->accumulated_flags = 0;
}
@@ -53,7 +53,7 @@ void ndd_irq_worker(struct work_struct *ws)
if (cur->DescStatusFlags & DMA_DESC_STS_SHORT)
eng->accumulated_flags |= ACD_FLAG_ENG_ACCUM_SHORT;
- if (cur->DescControlFlags & DMA_DESC_CTL_EOP){
+ if (cur->DescControlFlags & DMA_DESC_CTL_EOP) {
if (cur->acd)
transfer_complete_cb(cur->acd, eng->accumulated_bytes, eng->accumulated_flags | ACD_FLAG_DONE);
}
@@ -98,7 +98,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
if (WARN(!(caps & ENG_CAP_PRESENT), "setup_dma_engine() called for DMA Engine at %p which isn't present in hardware!\n", eng))
return -ENXIO;
- if (caps & ENG_CAP_DIRECTION){
+ if (caps & ENG_CAP_DIRECTION) {
eng->dir = DMA_FROM_DEVICE;
} else {
eng->dir = DMA_TO_DEVICE;
@@ -108,7 +108,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
eng->desc_pool = dma_pool_create("KPC DMA Descriptors", &eng->pldev->dev, sizeof(struct kpc_dma_descriptor), DMA_DESC_ALIGNMENT, 4096);
eng->desc_pool_first = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &head_handle);
- if (!eng->desc_pool_first){
+ if (!eng->desc_pool_first) {
dev_err(&eng->pldev->dev, "setup_dma_engine: couldn't allocate desc_pool_first!\n");
dma_pool_destroy(eng->desc_pool);
return -ENOMEM;
@@ -118,7 +118,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
clear_desc(eng->desc_pool_first);
cur = eng->desc_pool_first;
- for (i = 1 ; i < eng->desc_pool_cnt ; i++){
+ for (i = 1 ; i < eng->desc_pool_cnt ; i++) {
next = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &next_handle);
if (next == NULL)
goto done_alloc;
@@ -144,7 +144,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
// Grab IRQ line
rv = request_irq(eng->irq, ndd_irq_handler, IRQF_SHARED, KP_DRIVER_NAME_DMA_CONTROLLER, eng);
- if (rv){
+ if (rv) {
dev_err(&eng->pldev->dev, "setup_dma_engine: failed to request_irq: %d\n", rv);
return rv;
}
@@ -166,8 +166,8 @@ void stop_dma_engine(struct kpc_dma_device *eng)
// Wait for descriptor engine to finish current operaion
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & ENG_CTL_DMA_RUNNING){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & ENG_CTL_DMA_RUNNING) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "DMA_RUNNING still asserted!\n");
break;
}
@@ -178,8 +178,8 @@ void stop_dma_engine(struct kpc_dma_device *eng)
// Wait for reset request to be processed
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & (ENG_CTL_DMA_RUNNING | ENG_CTL_DMA_RESET_REQUEST)){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & (ENG_CTL_DMA_RUNNING | ENG_CTL_DMA_RESET_REQUEST)) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "ENG_CTL_DMA_RESET_REQUEST still asserted!\n");
break;
}
@@ -190,8 +190,8 @@ void stop_dma_engine(struct kpc_dma_device *eng)
// And wait for reset to complete
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & ENG_CTL_DMA_RESET){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & ENG_CTL_DMA_RESET) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "DMA_RESET still asserted!\n");
break;
}
@@ -217,7 +217,7 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
cur = eng->desc_pool_first;
cur_handle = eng->desc_pool_first->MyDMAAddr;
- for (i = 0 ; i < eng->desc_pool_cnt ; i++){
+ for (i = 0 ; i < eng->desc_pool_cnt ; i++) {
struct kpc_dma_descriptor *next = cur->Next;
dma_addr_t next_handle = cur->DescNextDescPtr;
dma_pool_free(eng->desc_pool, cur, cur_handle);
@@ -237,7 +237,7 @@ int count_descriptors_available(struct kpc_dma_device *eng)
{
u32 count = 0;
struct kpc_dma_descriptor *cur = eng->desc_next;
- while (cur != eng->desc_completed){
+ while (cur != eng->desc_completed) {
BUG_ON(cur == NULL);
count++;
cur = cur->Next;
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 61927b313a26..8dd948ef455f 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -58,7 +58,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void *)iov_base, iov_len, ldev);
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
- if (!acd){
+ if (!acd) {
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the aio data\n");
return -ENOMEM;
}
@@ -74,7 +74,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
// Allocate an array of page pointers
acd->user_pages = kzalloc(sizeof(struct page *) * acd->page_count, GFP_KERNEL);
- if (!acd->user_pages){
+ if (!acd->user_pages) {
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the page pointers\n");
rv = -ENOMEM;
goto err_alloc_userpages;
@@ -84,27 +84,27 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
down_read(¤t->mm->mmap_sem); /* get memory map semaphore */
rv = get_user_pages(iov_base, acd->page_count, FOLL_TOUCH | FOLL_WRITE | FOLL_GET, acd->user_pages, NULL);
up_read(¤t->mm->mmap_sem); /* release the semaphore */
- if (rv != acd->page_count){
+ if (rv != acd->page_count) {
dev_err(&priv->ldev->pldev->dev, "Couldn't get_user_pages (%ld)\n", rv);
goto err_get_user_pages;
}
// Allocate and setup the sg_table (scatterlist entries)
rv = sg_alloc_table_from_pages(&acd->sgt, acd->user_pages, acd->page_count, iov_base & (PAGE_SIZE-1), iov_len, GFP_KERNEL);
- if (rv){
+ if (rv) {
dev_err(&priv->ldev->pldev->dev, "Couldn't alloc sg_table (%ld)\n", rv);
goto err_alloc_sg_table;
}
// Setup the DMA mapping for all the sg entries
acd->mapped_entry_count = dma_map_sg(&ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, ldev->dir);
- if (acd->mapped_entry_count <= 0){
+ if (acd->mapped_entry_count <= 0) {
dev_err(&priv->ldev->pldev->dev, "Couldn't dma_map_sg (%d)\n", acd->mapped_entry_count);
goto err_dma_map_sg;
}
// Calculate how many descriptors are actually needed for this transfer.
- for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i){
+ for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i) {
desc_needed += count_parts_for_sge(sg);
}
@@ -113,13 +113,13 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
// Figoure out how many descriptors are available and return an error if there aren't enough
num_descrs_avail = count_descriptors_available(ldev);
dev_dbg(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
- if (desc_needed >= ldev->desc_pool_cnt){
+ if (desc_needed >= ldev->desc_pool_cnt) {
dev_warn(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d TOO MANY to ever complete!\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
rv = -EAGAIN;
unlock_engine(ldev);
goto err_descr_too_many;
}
- if (desc_needed > num_descrs_avail){
+ if (desc_needed > num_descrs_avail) {
dev_warn(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d Too many to complete right now.\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
rv = -EMSGSIZE;
unlock_engine(ldev);
@@ -129,13 +129,13 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
// Loop through all the sg table entries and fill out a descriptor for each one.
desc = ldev->desc_next;
card_addr = acd->priv->card_addr;
- for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i){
+ for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i) {
pcnt = count_parts_for_sge(sg);
- for (p = 0 ; p < pcnt ; p++){
+ for (p = 0 ; p < pcnt ; p++) {
// Fill out the descriptor
BUG_ON(desc == NULL);
clear_desc(desc);
- if (p != pcnt-1){
+ if (p != pcnt-1) {
desc->DescByteCount = 0x80000;
} else {
desc->DescByteCount = sg_dma_len(sg) - (p * 0x80000);
@@ -157,7 +157,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
desc->DescSystemAddrMS = (dma_addr & 0xFFFFFFFF00000000) >> 32;
user_ctl = acd->priv->user_ctl;
- if (i == acd->mapped_entry_count-1 && p == pcnt-1){
+ if (i == acd->mapped_entry_count-1 && p == pcnt-1) {
user_ctl = acd->priv->user_ctl_last;
}
desc->DescUserControlLS = (user_ctl & 0x00000000FFFFFFFF) >> 0;
@@ -179,13 +179,13 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
unlock_engine(ldev);
// If this is a synchronous kiocb, we need to put the calling process to sleep until the transfer is complete
- if (kcb == NULL || is_sync_kiocb(kcb)){
+ if (kcb == NULL || is_sync_kiocb(kcb)) {
rv = wait_for_completion_interruptible(&done);
// If the user aborted (rv == -ERESTARTSYS), we're no longer responsible for cleaning up the acd
- if (rv == -ERESTARTSYS){
+ if (rv == -ERESTARTSYS) {
acd->cpl = NULL;
}
- if (rv == 0){
+ if (rv == 0) {
rv = acd->len;
kfree(acd);
}
@@ -200,7 +200,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
sg_free_table(&acd->sgt);
err_dma_map_sg:
err_alloc_sg_table:
- for (i = 0 ; i < acd->page_count ; i++){
+ for (i = 0 ; i < acd->page_count ; i++) {
put_page(acd->user_pages[i]);
}
err_get_user_pages:
@@ -223,15 +223,15 @@ void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
dev_dbg(&acd->ldev->pldev->dev, "transfer_complete_cb(acd = [%p])\n", acd);
- for (i = 0 ; i < acd->page_count ; i++){
- if (!PageReserved(acd->user_pages[i])){
+ for (i = 0 ; i < acd->page_count ; i++) {
+ if (!PageReserved(acd->user_pages[i])) {
set_page_dirty(acd->user_pages[i]);
}
}
dma_unmap_sg(&acd->ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, acd->ldev->dir);
- for (i = 0 ; i < acd->page_count ; i++){
+ for (i = 0 ; i < acd->page_count ; i++) {
put_page(acd->user_pages[i]);
}
@@ -241,8 +241,8 @@ void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
acd->flags = flags;
- if (acd->kcb == NULL || is_sync_kiocb(acd->kcb)){
- if (acd->cpl){
+ if (acd->kcb == NULL || is_sync_kiocb(acd->kcb)) {
+ if (acd->cpl) {
complete(acd->cpl);
} else {
// There's no completion, so we're responsible for cleaning up the acd
@@ -265,7 +265,7 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
if (ldev == NULL)
return -ENODEV;
- if (! atomic_dec_and_test(&ldev->open_count)){
+ if (!atomic_dec_and_test(&ldev->open_count)) {
atomic_inc(&ldev->open_count);
return -EBUSY; /* already open */
}
@@ -294,9 +294,9 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
stop_dma_engine(eng);
cur = eng->desc_completed->Next;
- while (cur != eng->desc_next){
+ while (cur != eng->desc_next) {
dev_dbg(&eng->pldev->dev, "Aborting descriptor %p (acd = %p)\n", cur, cur->acd);
- if (cur->DescControlFlags & DMA_DESC_CTL_EOP){
+ if (cur->DescControlFlags & DMA_DESC_CTL_EOP) {
if (cur->acd)
transfer_complete_cb(cur->acd, 0, ACD_FLAG_ABORT);
}
@@ -334,7 +334,7 @@ ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
- if (iov_count != 1){
+ if (iov_count != 1) {
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_read() called with iov_count > 1!\n");
return -EFAULT;
}
@@ -353,7 +353,7 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
- if (iov_count != 1){
+ if (iov_count != 1) {
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_write() called with iov_count > 1!\n");
return -EFAULT;
}
@@ -365,7 +365,7 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
#endif
static
-ssize_t kpc_dma_read( struct file *filp, char __user *user_buf, size_t count, loff_t *ppos)
+ssize_t kpc_dma_read(struct file *filp, char __user *user_buf, size_t count, loff_t *ppos)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
@@ -394,7 +394,7 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
- switch (ioctl_num){
+ switch (ioctl_num) {
case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index 004d91b5ad00..0b8dcf046136 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -97,7 +97,7 @@ int kpc_dma_probe(struct platform_device *pldev)
dev_t dev;
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
- if (!ldev){
+ if (!ldev) {
dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
rv = -ENOMEM;
goto err_rv;
@@ -116,20 +116,20 @@ int kpc_dma_probe(struct platform_device *pldev)
// Get Engine regs resource
r = platform_get_resource(pldev, IORESOURCE_MEM, 0);
- if (!r){
+ if (!r) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the engine regs resource!\n");
rv = -ENXIO;
goto err_kfree;
}
ldev->eng_regs = ioremap_nocache(r->start, resource_size(r));
- if (!ldev->eng_regs){
+ if (!ldev->eng_regs) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to ioremap engine regs!\n");
rv = -ENXIO;
goto err_kfree;
}
r = platform_get_resource(pldev, IORESOURCE_IRQ, 0);
- if (!r){
+ if (!r) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the IRQ resource!\n");
rv = -ENXIO;
goto err_kfree;
@@ -139,21 +139,21 @@ int kpc_dma_probe(struct platform_device *pldev)
// Setup miscdev struct
dev = MKDEV(assigned_major_num, pldev->id);
ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
- if (IS_ERR(ldev->kpc_dma_dev)){
+ if (IS_ERR(ldev->kpc_dma_dev)) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: device_create failed: %d\n", rv);
goto err_kfree;
}
// Setup the DMA engine
rv = setup_dma_engine(ldev, 30);
- if (rv){
+ if (rv) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to setup_dma_engine: %d\n", rv);
goto err_misc_dereg;
}
// Setup the sysfs files
rv = sysfs_create_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
- if (rv){
+ if (rv) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: Failed to add sysfs files: %d\n", rv);
goto err_destroy_eng;
}
@@ -208,7 +208,7 @@ int __init kpc_dma_driver_init(void)
int err;
err = __register_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma", &kpc_dma_fops);
- if (err < 0){
+ if (err < 0) {
pr_err("Can't allocate a major number (%d) for kpc_dma (err = %d)\n", KPC_DMA_CHAR_MAJOR, err);
goto fail_chrdev_register;
}
@@ -216,13 +216,13 @@ int __init kpc_dma_driver_init(void)
kpc_dma_class = class_create(THIS_MODULE, "kpc_dma");
err = PTR_ERR(kpc_dma_class);
- if (IS_ERR(kpc_dma_class)){
+ if (IS_ERR(kpc_dma_class)) {
pr_err("Can't create class kpc_dma (err = %d)\n", err);
goto fail_class_create;
}
err = platform_driver_register(&kpc_dma_plat_driver_i);
- if (err){
+ if (err) {
pr_err("Can't register platform driver for kpc_dma (err = %d)\n", err);
goto fail_platdriver_register;
}
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v2 4/8] Staging: kpc2000: kpc_dma: Resolve code indent error reported by checkpatch
2019-05-12 23:39 ` [PATCH v2 1/8] Staging: kpc2000: kpc_dma: resolve trailing whitespace error reported by checkpatch Vandana BN
2019-05-12 23:39 ` [PATCH v2 2/8] Staging: kpc2000: kpc_dma: Resolve coding style errors " Vandana BN
2019-05-12 23:39 ` [PATCH v2 3/8] " Vandana BN
@ 2019-05-12 23:39 ` Vandana BN
2019-05-12 23:39 ` [PATCH v2 5/8] Staging: kpc2000: kpc_dma: Resolve coding style " Vandana BN
` (3 subsequent siblings)
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-12 23:39 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch fixes code indentaion error reported by checkpath
ERROR: switch and case should be at the same indent
ERROR: trailing statements should be on next line
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/fileops.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 8dd948ef455f..c09147aaa4ef 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -395,10 +395,14 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
switch (ioctl_num) {
- case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
- case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
- case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
- case KND_IOCTL_GET_USER_STS: return priv->user_sts;
+ case KND_IOCTL_SET_CARD_ADDR:
+ priv->card_addr = ioctl_param; return priv->card_addr;
+ case KND_IOCTL_SET_USER_CTL:
+ priv->user_ctl = ioctl_param; return priv->user_ctl;
+ case KND_IOCTL_SET_USER_CTL_LAST:
+ priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
+ case KND_IOCTL_GET_USER_STS:
+ return priv->user_sts;
}
return -ENOTTY;
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v2 5/8] Staging: kpc2000: kpc_dma: Resolve coding style error reported by checkpatch
2019-05-12 23:39 ` [PATCH v2 1/8] Staging: kpc2000: kpc_dma: resolve trailing whitespace error reported by checkpatch Vandana BN
` (2 preceding siblings ...)
2019-05-12 23:39 ` [PATCH v2 4/8] Staging: kpc2000: kpc_dma: Resolve code indent error " Vandana BN
@ 2019-05-12 23:39 ` Vandana BN
2019-05-12 23:39 ` [PATCH v2 6/8] Staging: kpc2000: kpc_dma: Resolve coding style warning " Vandana BN
` (2 subsequent siblings)
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-12 23:39 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch fixes below errors reported by checkpath
ERROR: Macros with complex values should be enclosed in parentheses
CHECK: Prefer using the BIT macro
ERROR: trailing statements should be on next line
ERROR: trailing statements should be on next line
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index 0b8dcf046136..e996ced77bd6 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -14,7 +14,7 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("Matt.Sickler@daktronics.com");
#define KPC_DMA_CHAR_MAJOR UNNAMED_MAJOR
-#define KPC_DMA_NUM_MINORS 1 << MINORBITS
+#define KPC_DMA_NUM_MINORS BIT(MINORBITS)
static DEFINE_MUTEX(kpc_dma_mtx);
static int assigned_major_num;
static LIST_HEAD(kpc_dma_list);
@@ -55,9 +55,11 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
{
struct kpc_dma_device *ldev;
struct platform_device *pldev = to_platform_device(dev);
- if (!pldev) return 0;
+ if (!pldev)
+ return 0;
ldev = platform_get_drvdata(pldev);
- if (!ldev) return 0;
+ if (!ldev)
+ return 0;
return scnprintf(buf, PAGE_SIZE,
"EngineControlStatus = 0x%08x\n"
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v2 6/8] Staging: kpc2000: kpc_dma: Resolve coding style warning reported by checkpatch
2019-05-12 23:39 ` [PATCH v2 1/8] Staging: kpc2000: kpc_dma: resolve trailing whitespace error reported by checkpatch Vandana BN
` (3 preceding siblings ...)
2019-05-12 23:39 ` [PATCH v2 5/8] Staging: kpc2000: kpc_dma: Resolve coding style " Vandana BN
@ 2019-05-12 23:39 ` Vandana BN
2019-05-12 23:39 ` [PATCH v2 7/8] " Vandana BN
2019-05-12 23:40 ` [PATCH v2 8/8] " Vandana BN
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-12 23:39 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resloves below warnings reported by checkpath in kpc_dma
WARNING: Missing a blank line after declarations
WARNING: labels should not be indented
CHECK: Please don't use multiple blank lines
CHECK: Please use a blank line after function/struct/union/enum
declarations
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/dma.c | 8 +++++---
drivers/staging/kpc2000/kpc_dma/fileops.c | 11 ++++++++++-
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c | 15 ++++++++-------
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h | 8 ++++++--
4 files changed, 29 insertions(+), 13 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index 2053316009bc..ac842fa38c64 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -27,6 +27,7 @@ void ndd_irq_worker(struct work_struct *ws)
{
struct kpc_dma_descriptor *cur;
struct kpc_dma_device *eng = container_of(ws, struct kpc_dma_device, irq_work);
+
lock_engine(eng);
if (GetEngineCompletePtr(eng) == 0)
@@ -67,7 +68,6 @@ void ndd_irq_worker(struct work_struct *ws)
unlock_engine(eng);
}
-
/********** DMA Engine Init/Teardown **********/
void start_dma_engine(struct kpc_dma_device *eng)
{
@@ -91,6 +91,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
dma_addr_t head_handle;
unsigned int i;
int rv;
+
dev_dbg(&eng->pldev->dev, "Setting up DMA engine [%p]\n", eng);
caps = GetEngineCapabilities(eng);
@@ -159,6 +160,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
void stop_dma_engine(struct kpc_dma_device *eng)
{
unsigned long timeout;
+
dev_dbg(&eng->pldev->dev, "Destroying DMA engine [%p]\n", eng);
// Disable the descriptor engine
@@ -220,6 +222,7 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
for (i = 0 ; i < eng->desc_pool_cnt ; i++) {
struct kpc_dma_descriptor *next = cur->Next;
dma_addr_t next_handle = cur->DescNextDescPtr;
+
dma_pool_free(eng->desc_pool, cur, cur_handle);
cur_handle = next_handle;
cur = next;
@@ -230,13 +233,12 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
free_irq(eng->irq, eng);
}
-
-
/********** Helper Functions **********/
int count_descriptors_available(struct kpc_dma_device *eng)
{
u32 count = 0;
struct kpc_dma_descriptor *cur = eng->desc_next;
+
while (cur != eng->desc_completed) {
BUG_ON(cur == NULL);
count++;
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index c09147aaa4ef..13c0e532437e 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -21,6 +21,7 @@ unsigned int count_pages(unsigned long iov_base, size_t iov_len)
{
unsigned long first = (iov_base & PAGE_MASK) >> PAGE_SHIFT;
unsigned long last = ((iov_base+iov_len-1) & PAGE_MASK) >> PAGE_SHIFT;
+
return last - first + 1;
}
@@ -28,6 +29,7 @@ static inline
unsigned int count_parts_for_sge(struct scatterlist *sg)
{
unsigned int sg_length = sg_dma_len(sg);
+
sg_length += (0x80000-1);
return (sg_length / 0x80000);
}
@@ -262,6 +264,7 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
{
struct dev_private_data *priv;
struct kpc_dma_device *ldev = kpc_dma_lookup_device(iminor(inode));
+
if (ldev == NULL)
return -ENODEV;
@@ -287,6 +290,7 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
struct kpc_dma_descriptor *cur;
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
struct kpc_dma_device *eng = priv->ldev;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_close(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", inode, filp, priv, priv->ldev);
lock_engine(eng);
@@ -321,6 +325,7 @@ static
int kpc_dma_aio_cancel(struct kiocb *kcb)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_cancel(kcb = [%p]) priv = [%p], ldev = [%p]\n", kcb, priv, priv->ldev);
return 0;
}
@@ -329,6 +334,7 @@ static
ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned long iov_count, loff_t pos)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_read(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
@@ -348,6 +354,7 @@ static
ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned long iov_count, loff_t pos)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_write(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
@@ -368,6 +375,7 @@ static
ssize_t kpc_dma_read(struct file *filp, char __user *user_buf, size_t count, loff_t *ppos)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
@@ -380,6 +388,7 @@ static
ssize_t kpc_dma_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *ppos)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_write(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
@@ -392,6 +401,7 @@ static
long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioctl_param)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
switch (ioctl_num) {
@@ -408,7 +418,6 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
return -ENOTTY;
}
-
struct file_operations kpc_dma_fops = {
.owner = THIS_MODULE,
.open = kpc_dma_open,
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index e996ced77bd6..135428e62f8e 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -19,11 +19,11 @@ static DEFINE_MUTEX(kpc_dma_mtx);
static int assigned_major_num;
static LIST_HEAD(kpc_dma_list);
-
/********** kpc_dma_list list management **********/
struct kpc_dma_device *kpc_dma_lookup_device(int minor)
{
struct kpc_dma_device *c;
+
mutex_lock(&kpc_dma_mtx);
list_for_each_entry(c, &kpc_dma_list, list) {
if (c->pldev->id == minor) {
@@ -31,7 +31,7 @@ struct kpc_dma_device *kpc_dma_lookup_device(int minor)
}
}
c = NULL; // not-found case
- out:
+out:
mutex_unlock(&kpc_dma_mtx);
return c;
}
@@ -55,6 +55,7 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
{
struct kpc_dma_device *ldev;
struct platform_device *pldev = to_platform_device(dev);
+
if (!pldev)
return 0;
ldev = platform_get_drvdata(pldev);
@@ -89,7 +90,6 @@ static const struct attribute *ndd_attr_list[] = {
struct class *kpc_dma_class;
-
/********** Platform Driver Functions **********/
static
int kpc_dma_probe(struct platform_device *pldev)
@@ -99,6 +99,7 @@ int kpc_dma_probe(struct platform_device *pldev)
dev_t dev;
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
+
if (!ldev) {
dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
rv = -ENOMEM;
@@ -178,6 +179,7 @@ static
int kpc_dma_remove(struct platform_device *pldev)
{
struct kpc_dma_device *ldev = platform_get_drvdata(pldev);
+
if (!ldev)
return -ENXIO;
@@ -193,7 +195,6 @@ int kpc_dma_remove(struct platform_device *pldev)
return 0;
}
-
/********** Driver Functions **********/
struct platform_driver kpc_dma_plat_driver_i = {
.probe = kpc_dma_probe,
@@ -231,11 +232,11 @@ int __init kpc_dma_driver_init(void)
return err;
- fail_platdriver_register:
+fail_platdriver_register:
class_destroy(kpc_dma_class);
- fail_class_create:
+fail_class_create:
__unregister_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma");
- fail_chrdev_register:
+fail_chrdev_register:
return err;
}
module_init(kpc_dma_driver_init);
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index 8101601736a2..cf781940ac1b 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -18,7 +18,6 @@
#include <linux/bitops.h>
#include "../kpc.h"
-
struct kp2000_device;
struct kpc_dma_device {
struct list_head list;
@@ -157,15 +156,18 @@ void WriteEngineControl(struct kpc_dma_device *eng, u32 value)
{
writel(value, eng->eng_regs + 1);
}
+
static inline
u32 GetEngineControl(struct kpc_dma_device *eng)
{
return readl(eng->eng_regs + 1);
}
+
static inline
void SetClearEngineControl(struct kpc_dma_device *eng, u32 set_bits, u32 clear_bits)
{
u32 val = GetEngineControl(eng);
+
val |= set_bits;
val &= ~clear_bits;
WriteEngineControl(eng, val);
@@ -176,16 +178,19 @@ void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *de
{
writel(desc->MyDMAAddr, eng->eng_regs + 2);
}
+
static inline
void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
{
writel(desc->MyDMAAddr, eng->eng_regs + 3);
}
+
static inline
void ClearEngineCompletePtr(struct kpc_dma_device *eng)
{
writel(0, eng->eng_regs + 4);
}
+
static inline
u32 GetEngineCompletePtr(struct kpc_dma_device *eng)
{
@@ -206,7 +211,6 @@ void unlock_engine(struct kpc_dma_device *eng)
mutex_unlock(&eng->sem);
}
-
/// Shared Functions
void start_dma_engine(struct kpc_dma_device *eng);
int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt);
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v2 7/8] Staging: kpc2000: kpc_dma: Resolve coding style warning reported by checkpatch
2019-05-12 23:39 ` [PATCH v2 1/8] Staging: kpc2000: kpc_dma: resolve trailing whitespace error reported by checkpatch Vandana BN
` (4 preceding siblings ...)
2019-05-12 23:39 ` [PATCH v2 6/8] Staging: kpc2000: kpc_dma: Resolve coding style warning " Vandana BN
@ 2019-05-12 23:39 ` Vandana BN
2019-05-12 23:40 ` [PATCH v2 8/8] " Vandana BN
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-12 23:39 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resolves warnings to use __func__ insted of funtion name.
WARNING: Prefer using '"%s...", __func__' to using 'setup_dma_engine', this function's name, in a string
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/dma.c | 6 ++---
drivers/staging/kpc2000/kpc_dma/fileops.c | 26 +++++++++----------
.../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 18 ++++++-------
3 files changed, 25 insertions(+), 25 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index ac842fa38c64..13687ab3e9c7 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -96,7 +96,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
caps = GetEngineCapabilities(eng);
- if (WARN(!(caps & ENG_CAP_PRESENT), "setup_dma_engine() called for DMA Engine at %p which isn't present in hardware!\n", eng))
+ if (WARN(!(caps & ENG_CAP_PRESENT), "%s() called for DMA Engine at %p which isn't present in hardware!\n", __func__, eng))
return -ENXIO;
if (caps & ENG_CAP_DIRECTION) {
@@ -110,7 +110,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
eng->desc_pool_first = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &head_handle);
if (!eng->desc_pool_first) {
- dev_err(&eng->pldev->dev, "setup_dma_engine: couldn't allocate desc_pool_first!\n");
+ dev_err(&eng->pldev->dev, "%s: couldn't allocate desc_pool_first!\n", __func__);
dma_pool_destroy(eng->desc_pool);
return -ENOMEM;
}
@@ -146,7 +146,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
// Grab IRQ line
rv = request_irq(eng->irq, ndd_irq_handler, IRQF_SHARED, KP_DRIVER_NAME_DMA_CONTROLLER, eng);
if (rv) {
- dev_err(&eng->pldev->dev, "setup_dma_engine: failed to request_irq: %d\n", rv);
+ dev_err(&eng->pldev->dev, "%s: failed to request_irq: %d\n", __func__, rv);
return rv;
}
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 13c0e532437e..c21672ea2b4f 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -57,7 +57,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
ldev = priv->ldev;
BUG_ON(ldev == NULL);
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void *)iov_base, iov_len, ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", __func__, priv, kcb, (void *)iov_base, iov_len, ldev);
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd) {
@@ -209,7 +209,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
kfree(acd->user_pages);
err_alloc_userpages:
kfree(acd);
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer returning with error %ld\n", rv);
+ dev_dbg(&priv->ldev->pldev->dev, "%s returning with error %ld\n", __func__, rv);
return rv;
}
@@ -223,7 +223,7 @@ void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
BUG_ON(acd->ldev == NULL);
BUG_ON(acd->ldev->pldev == NULL);
- dev_dbg(&acd->ldev->pldev->dev, "transfer_complete_cb(acd = [%p])\n", acd);
+ dev_dbg(&acd->ldev->pldev->dev, "%s(acd = [%p])\n", __func__, acd);
for (i = 0 ; i < acd->page_count ; i++) {
if (!PageReserved(acd->user_pages[i])) {
@@ -280,7 +280,7 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
priv->ldev = ldev;
filp->private_data = priv;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_open(inode = [%p], filp = [%p]) priv = [%p] ldev = [%p]\n", inode, filp, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(inode = [%p], filp = [%p]) priv = [%p] ldev = [%p]\n", __func__, inode, filp, priv, priv->ldev);
return 0;
}
@@ -291,7 +291,7 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
struct kpc_dma_device *eng = priv->ldev;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_close(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", inode, filp, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", __func__, inode, filp, priv, priv->ldev);
lock_engine(eng);
@@ -326,7 +326,7 @@ int kpc_dma_aio_cancel(struct kiocb *kcb)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_cancel(kcb = [%p]) priv = [%p], ldev = [%p]\n", kcb, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p]) priv = [%p], ldev = [%p]\n", __func__, kcb, priv, priv->ldev);
return 0;
}
@@ -335,13 +335,13 @@ ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_read(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", __func__, kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
if (iov_count != 1) {
- dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_read() called with iov_count > 1!\n");
+ dev_err(&priv->ldev->pldev->dev, "%s() called with iov_count > 1!\n", __func__);
return -EFAULT;
}
@@ -355,13 +355,13 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_write(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", __func__, kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
if (iov_count != 1) {
- dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_write() called with iov_count > 1!\n");
+ dev_err(&priv->ldev->pldev->dev, "%s() called with iov_count > 1!\n", __func__);
return -EFAULT;
}
@@ -376,7 +376,7 @@ ssize_t kpc_dma_read(struct file *filp, char __user *user_buf, size_t cou
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", __func__, filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
@@ -389,7 +389,7 @@ ssize_t kpc_dma_write(struct file *filp, const char __user *user_buf, size_t co
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_write(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", __func__, filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
@@ -402,7 +402,7 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", __func__, filp, ioctl_num, ioctl_param, priv, priv->ldev);
switch (ioctl_num) {
case KND_IOCTL_SET_CARD_ADDR:
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index 135428e62f8e..cda057569163 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -101,12 +101,12 @@ int kpc_dma_probe(struct platform_device *pldev)
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
if (!ldev) {
- dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
+ dev_err(&pldev->dev, "%s: unable to kzalloc space for kpc_dma_device\n", __func__);
rv = -ENOMEM;
goto err_rv;
}
- dev_dbg(&pldev->dev, "kpc_dma_probe(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
+ dev_dbg(&pldev->dev, "%s(pldev = [%p]) ldev = [%p]\n", __func__, pldev, ldev);
INIT_LIST_HEAD(&ldev->list);
@@ -120,20 +120,20 @@ int kpc_dma_probe(struct platform_device *pldev)
// Get Engine regs resource
r = platform_get_resource(pldev, IORESOURCE_MEM, 0);
if (!r) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the engine regs resource!\n");
+ dev_err(&ldev->pldev->dev, "%s: didn't get the engine regs resource!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
ldev->eng_regs = ioremap_nocache(r->start, resource_size(r));
if (!ldev->eng_regs) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to ioremap engine regs!\n");
+ dev_err(&ldev->pldev->dev, "%s: failed to ioremap engine regs!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
r = platform_get_resource(pldev, IORESOURCE_IRQ, 0);
if (!r) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the IRQ resource!\n");
+ dev_err(&ldev->pldev->dev, "%s: didn't get the IRQ resource!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
@@ -143,21 +143,21 @@ int kpc_dma_probe(struct platform_device *pldev)
dev = MKDEV(assigned_major_num, pldev->id);
ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
if (IS_ERR(ldev->kpc_dma_dev)) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: device_create failed: %d\n", rv);
+ dev_err(&ldev->pldev->dev, "%s: device_create failed: %d\n", __func__, rv);
goto err_kfree;
}
// Setup the DMA engine
rv = setup_dma_engine(ldev, 30);
if (rv) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to setup_dma_engine: %d\n", rv);
+ dev_err(&ldev->pldev->dev, "%s: failed to setup_dma_engine: %d\n", __func__, rv);
goto err_misc_dereg;
}
// Setup the sysfs files
rv = sysfs_create_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
if (rv) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: Failed to add sysfs files: %d\n", rv);
+ dev_err(&ldev->pldev->dev, "%s: Failed to add sysfs files: %d\n", __func__, rv);
goto err_destroy_eng;
}
@@ -183,7 +183,7 @@ int kpc_dma_remove(struct platform_device *pldev)
if (!ldev)
return -ENXIO;
- dev_dbg(&ldev->pldev->dev, "kpc_dma_remove(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
+ dev_dbg(&ldev->pldev->dev, "%s(pldev = [%p]) ldev = [%p]\n", __func__, pldev, ldev);
lock_engine(ldev);
sysfs_remove_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v2 8/8] Staging: kpc2000: kpc_dma: Resolve coding style warning reported by checkpatch
2019-05-12 23:39 ` [PATCH v2 1/8] Staging: kpc2000: kpc_dma: resolve trailing whitespace error reported by checkpatch Vandana BN
` (5 preceding siblings ...)
2019-05-12 23:39 ` [PATCH v2 7/8] " Vandana BN
@ 2019-05-12 23:40 ` Vandana BN
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-12 23:40 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This Patch resolves unnecessary cast warning and const file_operations
WARNING: unnecessary cast may hide bugs
WARNING: struct file_operations should normally be const
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/fileops.c | 4 ++--
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index c21672ea2b4f..54a1419728ce 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -59,7 +59,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
dev_dbg(&priv->ldev->pldev->dev, "%s(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", __func__, priv, kcb, (void *)iov_base, iov_len, ldev);
- acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
+ acd = kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd) {
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the aio data\n");
return -ENOMEM;
@@ -418,7 +418,7 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
return -ENOTTY;
}
-struct file_operations kpc_dma_fops = {
+const struct file_operations kpc_dma_fops = {
.owner = THIS_MODULE,
.open = kpc_dma_open,
.release = kpc_dma_close,
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index cf781940ac1b..ee47f43e71cf 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -57,7 +57,7 @@ struct dev_private_data {
struct kpc_dma_device *kpc_dma_lookup_device(int minor);
-extern struct file_operations kpc_dma_fops;
+extern const struct file_operations kpc_dma_fops;
#define ENG_CAP_PRESENT 0x00000001
#define ENG_CAP_DIRECTION 0x00000002
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* Re: [PATCH v2 2/8] Staging: kpc2000: kpc_dma: Resolve coding style errors reported by checkpatch.
2019-05-12 23:39 ` [PATCH v2 2/8] Staging: kpc2000: kpc_dma: Resolve coding style errors " Vandana BN
@ 2019-05-13 8:42 ` Greg KH
2019-05-13 10:43 ` Vandana BN
0 siblings, 1 reply; 32+ messages in thread
From: Greg KH @ 2019-05-13 8:42 UTC (permalink / raw)
To: Vandana BN
Cc: devel, linux-kernel, lukas.bulwahn, linux-kernel-mentees, skhan
On Mon, May 13, 2019 at 05:09:54AM +0530, Vandana BN wrote:
> This patch resolves below errors reported by checkpatch
> ERROR: "(foo*)" should be "(foo *)"
> ERROR: "foo * bar" should be "foo *bar"
> ERROR: "foo __init bar" should be "foo __init bar"
> ERROR: "foo __exit bar" should be "foo __exit bar"
>
> Signed-off-by: Vandana BN <bnvandana@gmail.com>
Better...
But your subject lines are almost all the same, with some being
identical to others, yet you are doing different things in each of the
patch.
So please provide a better subject line saying, in a unique way, exactly
what you are doing here.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error reported by checkpatch
2019-05-10 19:38 [PATCH] Staging: kpc2000: kpc_dma: resolve checkpath errors and warnings Vandana BN
` (2 preceding siblings ...)
2019-05-12 23:39 ` [PATCH v2 1/8] Staging: kpc2000: kpc_dma: resolve trailing whitespace error reported by checkpatch Vandana BN
@ 2019-05-13 10:26 ` Vandana BN
2019-05-13 10:26 ` [PATCH v3 2/8] Staging: kpc2000: kpc_dma: Resolve space errors around pointers and function declarations " Vandana BN
` (7 more replies)
2019-05-13 13:43 ` [PATCH v4 " Vandana BN
4 siblings, 8 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 10:26 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
Resolve trailing whitespace error from checkpatch.pl
ERROR: trailing whitespace
---
v2-split changes to multiple patches
v3 - edit commit message
---
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/dma.c | 86 ++++++-------
drivers/staging/kpc2000/kpc_dma/fileops.c | 114 +++++++++---------
.../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 46 +++----
.../staging/kpc2000/kpc_dma/kpc_dma_driver.h | 16 +--
4 files changed, 131 insertions(+), 131 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index 6959bac11388..ba987307d898 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -15,10 +15,10 @@ static
irqreturn_t ndd_irq_handler(int irq, void *dev_id)
{
struct kpc_dma_device *ldev = (struct kpc_dma_device*)dev_id;
-
+
if ((GetEngineControl(ldev) & ENG_CTL_IRQ_ACTIVE) || (ldev->desc_completed->MyDMAAddr != GetEngineCompletePtr(ldev)))
schedule_work(&ldev->irq_work);
-
+
return IRQ_HANDLED;
}
@@ -28,42 +28,42 @@ void ndd_irq_worker(struct work_struct *ws)
struct kpc_dma_descriptor *cur;
struct kpc_dma_device *eng = container_of(ws, struct kpc_dma_device, irq_work);
lock_engine(eng);
-
+
if (GetEngineCompletePtr(eng) == 0)
goto out;
-
+
if (eng->desc_completed->MyDMAAddr == GetEngineCompletePtr(eng))
goto out;
-
+
cur = eng->desc_completed;
do {
cur = cur->Next;
dev_dbg(&eng->pldev->dev, "Handling completed descriptor %p (acd = %p)\n", cur, cur->acd);
BUG_ON(cur == eng->desc_next); // Ordering failure.
-
+
if (cur->DescControlFlags & DMA_DESC_CTL_SOP){
eng->accumulated_bytes = 0;
eng->accumulated_flags = 0;
}
-
+
eng->accumulated_bytes += cur->DescByteCount;
if (cur->DescStatusFlags & DMA_DESC_STS_ERROR)
eng->accumulated_flags |= ACD_FLAG_ENG_ACCUM_ERROR;
-
+
if (cur->DescStatusFlags & DMA_DESC_STS_SHORT)
eng->accumulated_flags |= ACD_FLAG_ENG_ACCUM_SHORT;
-
+
if (cur->DescControlFlags & DMA_DESC_CTL_EOP){
if (cur->acd)
transfer_complete_cb(cur->acd, eng->accumulated_bytes, eng->accumulated_flags | ACD_FLAG_DONE);
}
-
+
eng->desc_completed = cur;
} while (cur->MyDMAAddr != GetEngineCompletePtr(eng));
-
+
out:
SetClearEngineControl(eng, ENG_CTL_IRQ_ACTIVE, 0);
-
+
unlock_engine(eng);
}
@@ -73,12 +73,12 @@ void start_dma_engine(struct kpc_dma_device *eng)
{
eng->desc_next = eng->desc_pool_first;
eng->desc_completed = eng->desc_pool_last;
-
+
// Setup the engine pointer registers
SetEngineNextPtr(eng, eng->desc_pool_first);
SetEngineSWPtr(eng, eng->desc_pool_first);
ClearEngineCompletePtr(eng);
-
+
WriteEngineControl(eng, ENG_CTL_DMA_ENABLE | ENG_CTL_IRQ_ENABLE);
}
@@ -92,67 +92,67 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
unsigned int i;
int rv;
dev_dbg(&eng->pldev->dev, "Setting up DMA engine [%p]\n", eng);
-
+
caps = GetEngineCapabilities(eng);
-
+
if (WARN(!(caps & ENG_CAP_PRESENT), "setup_dma_engine() called for DMA Engine at %p which isn't present in hardware!\n", eng))
return -ENXIO;
-
+
if (caps & ENG_CAP_DIRECTION){
eng->dir = DMA_FROM_DEVICE;
} else {
eng->dir = DMA_TO_DEVICE;
}
-
+
eng->desc_pool_cnt = desc_cnt;
eng->desc_pool = dma_pool_create("KPC DMA Descriptors", &eng->pldev->dev, sizeof(struct kpc_dma_descriptor), DMA_DESC_ALIGNMENT, 4096);
-
+
eng->desc_pool_first = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &head_handle);
if (!eng->desc_pool_first){
dev_err(&eng->pldev->dev, "setup_dma_engine: couldn't allocate desc_pool_first!\n");
dma_pool_destroy(eng->desc_pool);
return -ENOMEM;
}
-
+
eng->desc_pool_first->MyDMAAddr = head_handle;
clear_desc(eng->desc_pool_first);
-
+
cur = eng->desc_pool_first;
for (i = 1 ; i < eng->desc_pool_cnt ; i++){
next = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &next_handle);
if (next == NULL)
goto done_alloc;
-
+
clear_desc(next);
next->MyDMAAddr = next_handle;
-
+
cur->DescNextDescPtr = next_handle;
cur->Next = next;
cur = next;
}
-
+
done_alloc:
// Link the last descriptor back to the first, so it's a circular linked list
cur->Next = eng->desc_pool_first;
cur->DescNextDescPtr = eng->desc_pool_first->MyDMAAddr;
-
+
eng->desc_pool_last = cur;
eng->desc_completed = eng->desc_pool_last;
-
+
// Setup work queue
INIT_WORK(&eng->irq_work, ndd_irq_worker);
-
+
// Grab IRQ line
rv = request_irq(eng->irq, ndd_irq_handler, IRQF_SHARED, KP_DRIVER_NAME_DMA_CONTROLLER, eng);
if (rv){
dev_err(&eng->pldev->dev, "setup_dma_engine: failed to request_irq: %d\n", rv);
return rv;
}
-
+
// Turn on the engine!
start_dma_engine(eng);
unlock_engine(eng);
-
+
return 0;
}
@@ -160,10 +160,10 @@ void stop_dma_engine(struct kpc_dma_device *eng)
{
unsigned long timeout;
dev_dbg(&eng->pldev->dev, "Destroying DMA engine [%p]\n", eng);
-
+
// Disable the descriptor engine
WriteEngineControl(eng, 0);
-
+
// Wait for descriptor engine to finish current operaion
timeout = jiffies + (HZ / 2);
while (GetEngineControl(eng) & ENG_CTL_DMA_RUNNING){
@@ -172,10 +172,10 @@ void stop_dma_engine(struct kpc_dma_device *eng)
break;
}
}
-
+
// Request a reset
WriteEngineControl(eng, ENG_CTL_DMA_RESET_REQUEST);
-
+
// Wait for reset request to be processed
timeout = jiffies + (HZ / 2);
while (GetEngineControl(eng) & (ENG_CTL_DMA_RUNNING | ENG_CTL_DMA_RESET_REQUEST)){
@@ -184,10 +184,10 @@ void stop_dma_engine(struct kpc_dma_device *eng)
break;
}
}
-
+
// Request a reset
WriteEngineControl(eng, ENG_CTL_DMA_RESET);
-
+
// And wait for reset to complete
timeout = jiffies + (HZ / 2);
while (GetEngineControl(eng) & ENG_CTL_DMA_RESET){
@@ -196,12 +196,12 @@ void stop_dma_engine(struct kpc_dma_device *eng)
break;
}
}
-
+
// Clear any persistent bits just to make sure there is no residue from the reset
SetClearEngineControl(eng, (ENG_CTL_IRQ_ACTIVE | ENG_CTL_DESC_COMPLETE | ENG_CTL_DESC_ALIGN_ERR | ENG_CTL_DESC_FETCH_ERR | ENG_CTL_SW_ABORT_ERR | ENG_CTL_DESC_CHAIN_END | ENG_CTL_DMA_WAITING_PERSIST), 0);
-
+
// Reset performance counters
-
+
// Completely disable the engine
WriteEngineControl(eng, 0);
}
@@ -211,12 +211,12 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
struct kpc_dma_descriptor * cur;
dma_addr_t cur_handle;
unsigned int i;
-
+
stop_dma_engine(eng);
-
+
cur = eng->desc_pool_first;
cur_handle = eng->desc_pool_first->MyDMAAddr;
-
+
for (i = 0 ; i < eng->desc_pool_cnt ; i++){
struct kpc_dma_descriptor *next = cur->Next;
dma_addr_t next_handle = cur->DescNextDescPtr;
@@ -224,9 +224,9 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
cur_handle = next_handle;
cur = next;
}
-
+
dma_pool_destroy(eng->desc_pool);
-
+
free_irq(eng->irq, eng);
}
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 5741d2b49a7d..6c38c3f978c3 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -50,20 +50,20 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
u64 card_addr;
u64 dma_addr;
u64 user_ctl;
-
+
BUG_ON(priv == NULL);
ldev = priv->ldev;
BUG_ON(ldev == NULL);
-
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void*)iov_base, iov_len, ldev);
-
+
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd){
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the aio data\n");
return -ENOMEM;
}
memset(acd, 0x66, sizeof(struct aio_cb_data));
-
+
acd->priv = priv;
acd->ldev = priv->ldev;
acd->cpl = &done;
@@ -71,7 +71,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
acd->kcb = kcb;
acd->len = iov_len;
acd->page_count = count_pages(iov_base, iov_len);
-
+
// Allocate an array of page pointers
acd->user_pages = kzalloc(sizeof(struct page *) * acd->page_count, GFP_KERNEL);
if (!acd->user_pages){
@@ -79,7 +79,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
rv = -ENOMEM;
goto err_alloc_userpages;
}
-
+
// Lock the user buffer pages in memory, and hold on to the page pointers (for the sglist)
down_read(¤t->mm->mmap_sem); /* get memory map semaphore */
rv = get_user_pages(iov_base, acd->page_count, FOLL_TOUCH | FOLL_WRITE | FOLL_GET, acd->user_pages, NULL);
@@ -88,14 +88,14 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
dev_err(&priv->ldev->pldev->dev, "Couldn't get_user_pages (%ld)\n", rv);
goto err_get_user_pages;
}
-
+
// Allocate and setup the sg_table (scatterlist entries)
rv = sg_alloc_table_from_pages(&acd->sgt, acd->user_pages, acd->page_count, iov_base & (PAGE_SIZE-1), iov_len, GFP_KERNEL);
if (rv){
dev_err(&priv->ldev->pldev->dev, "Couldn't alloc sg_table (%ld)\n", rv);
goto err_alloc_sg_table;
}
-
+
// Setup the DMA mapping for all the sg entries
acd->mapped_entry_count = dma_map_sg(&ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, ldev->dir);
if (acd->mapped_entry_count <= 0){
@@ -107,9 +107,9 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i){
desc_needed += count_parts_for_sge(sg);
}
-
+
lock_engine(ldev);
-
+
// Figoure out how many descriptors are available and return an error if there aren't enough
num_descrs_avail = count_descriptors_available(ldev);
dev_dbg(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
@@ -141,43 +141,43 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
desc->DescByteCount = sg_dma_len(sg) - (p * 0x80000);
}
desc->DescBufferByteCount = desc->DescByteCount;
-
+
desc->DescControlFlags |= DMA_DESC_CTL_IRQONERR;
if (i == 0 && p == 0)
desc->DescControlFlags |= DMA_DESC_CTL_SOP;
if (i == acd->mapped_entry_count-1 && p == pcnt-1)
desc->DescControlFlags |= DMA_DESC_CTL_EOP | DMA_DESC_CTL_IRQONDONE;
-
+
desc->DescCardAddrLS = (card_addr & 0xFFFFFFFF);
desc->DescCardAddrMS = (card_addr >> 32) & 0xF;
card_addr += desc->DescByteCount;
-
+
dma_addr = sg_dma_address(sg) + (p * 0x80000);
desc->DescSystemAddrLS = (dma_addr & 0x00000000FFFFFFFF) >> 0;
desc->DescSystemAddrMS = (dma_addr & 0xFFFFFFFF00000000) >> 32;
-
+
user_ctl = acd->priv->user_ctl;
if (i == acd->mapped_entry_count-1 && p == pcnt-1){
user_ctl = acd->priv->user_ctl_last;
}
desc->DescUserControlLS = (user_ctl & 0x00000000FFFFFFFF) >> 0;
desc->DescUserControlMS = (user_ctl & 0xFFFFFFFF00000000) >> 32;
-
+
if (i == acd->mapped_entry_count-1 && p == pcnt-1)
desc->acd = acd;
-
+
dev_dbg(&priv->ldev->pldev->dev, " Filled descriptor %p (acd = %p)\n", desc, desc->acd);
-
+
ldev->desc_next = desc->Next;
desc = desc->Next;
}
}
-
+
// Send the filled descriptors off to the hardware to process!
SetEngineSWPtr(ldev, ldev->desc_next);
-
+
unlock_engine(ldev);
-
+
// If this is a synchronous kiocb, we need to put the calling process to sleep until the transfer is complete
if (kcb == NULL || is_sync_kiocb(kcb)){
rv = wait_for_completion_interruptible(&done);
@@ -191,7 +191,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
}
return rv;
}
-
+
return -EIOCBQUEUED;
err_descr_too_many:
@@ -214,33 +214,33 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
{
unsigned int i;
-
+
BUG_ON(acd == NULL);
BUG_ON(acd->user_pages == NULL);
BUG_ON(acd->sgt.sgl == NULL);
BUG_ON(acd->ldev == NULL);
BUG_ON(acd->ldev->pldev == NULL);
-
+
dev_dbg(&acd->ldev->pldev->dev, "transfer_complete_cb(acd = [%p])\n", acd);
-
+
for (i = 0 ; i < acd->page_count ; i++){
if (!PageReserved(acd->user_pages[i])){
set_page_dirty(acd->user_pages[i]);
}
}
-
+
dma_unmap_sg(&acd->ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, acd->ldev->dir);
-
+
for (i = 0 ; i < acd->page_count ; i++){
put_page(acd->user_pages[i]);
}
-
+
sg_free_table(&acd->sgt);
-
+
kfree(acd->user_pages);
-
+
acd->flags = flags;
-
+
if (acd->kcb == NULL || is_sync_kiocb(acd->kcb)){
if (acd->cpl){
complete(acd->cpl);
@@ -264,19 +264,19 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
struct kpc_dma_device *ldev = kpc_dma_lookup_device(iminor(inode));
if (ldev == NULL)
return -ENODEV;
-
+
if (! atomic_dec_and_test(&ldev->open_count)){
atomic_inc(&ldev->open_count);
return -EBUSY; /* already open */
}
-
+
priv = kzalloc(sizeof(struct dev_private_data), GFP_KERNEL);
if (!priv)
return -ENOMEM;
-
+
priv->ldev = ldev;
filp->private_data = priv;
-
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_open(inode = [%p], filp = [%p]) priv = [%p] ldev = [%p]\n", inode, filp, priv, priv->ldev);
return 0;
}
@@ -288,11 +288,11 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
struct kpc_dma_device *eng = priv->ldev;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_close(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", inode, filp, priv, priv->ldev);
-
+
lock_engine(eng);
-
+
stop_dma_engine(eng);
-
+
cur = eng->desc_completed->Next;
while (cur != eng->desc_next){
dev_dbg(&eng->pldev->dev, "Aborting descriptor %p (acd = %p)\n", cur, cur->acd);
@@ -300,17 +300,17 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
if (cur->acd)
transfer_complete_cb(cur->acd, 0, ACD_FLAG_ABORT);
}
-
+
clear_desc(cur);
eng->desc_completed = cur;
-
+
cur = cur->Next;
}
-
+
start_dma_engine(eng);
-
+
unlock_engine(eng);
-
+
atomic_inc(&priv->ldev->open_count); /* release the device */
kfree(priv);
return 0;
@@ -330,15 +330,15 @@ ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_read(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
-
+
if (iov_count != 1){
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_read() called with iov_count > 1!\n");
return -EFAULT;
}
-
+
if (!is_sync_kiocb(kcb))
kiocb_set_cancel_fn(kcb, kpc_dma_aio_cancel);
return kpc_dma_transfer(priv, kcb, (unsigned long)iov->iov_base, iov->iov_len);
@@ -349,15 +349,15 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_write(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
-
+
if (iov_count != 1){
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_write() called with iov_count > 1!\n");
return -EFAULT;
}
-
+
if (!is_sync_kiocb(kcb))
kiocb_set_cancel_fn(kcb, kpc_dma_aio_cancel);
return kpc_dma_transfer(priv, kcb, (unsigned long)iov->iov_base, iov->iov_len);
@@ -369,10 +369,10 @@ ssize_t kpc_dma_read( struct file *filp, char __user *user_buf, size_t co
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
-
+
return kpc_dma_transfer(priv, (struct kiocb *)NULL, (unsigned long)user_buf, count);
}
@@ -381,10 +381,10 @@ ssize_t kpc_dma_write(struct file *filp, const char __user *user_buf, size_t co
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_write(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
-
+
return kpc_dma_transfer(priv, (struct kiocb *)NULL, (unsigned long)user_buf, count);
}
@@ -393,14 +393,14 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
-
+
switch (ioctl_num){
- case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
- case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
- case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
+ case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
+ case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
+ case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
case KND_IOCTL_GET_USER_STS: return priv->user_sts;
}
-
+
return -ENOTTY;
}
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index aeae58d9bc18..dece60e6e3f3 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -58,8 +58,8 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
if (!pldev) return 0;
ldev = platform_get_drvdata(pldev);
if (!ldev) return 0;
-
- return scnprintf(buf, PAGE_SIZE,
+
+ return scnprintf(buf, PAGE_SIZE,
"EngineControlStatus = 0x%08x\n"
"RegNextDescPtr = 0x%08x\n"
"RegSWDescPtr = 0x%08x\n"
@@ -95,25 +95,25 @@ int kpc_dma_probe(struct platform_device *pldev)
struct resource *r = NULL;
int rv = 0;
dev_t dev;
-
+
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
if (!ldev){
dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
rv = -ENOMEM;
goto err_rv;
}
-
+
dev_dbg(&pldev->dev, "kpc_dma_probe(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
-
+
INIT_LIST_HEAD(&ldev->list);
-
+
ldev->pldev = pldev;
platform_set_drvdata(pldev, ldev);
atomic_set(&ldev->open_count, 1);
-
+
mutex_init(&ldev->sem);
lock_engine(ldev);
-
+
// Get Engine regs resource
r = platform_get_resource(pldev, IORESOURCE_MEM, 0);
if (!r){
@@ -127,7 +127,7 @@ int kpc_dma_probe(struct platform_device *pldev)
rv = -ENXIO;
goto err_kfree;
}
-
+
r = platform_get_resource(pldev, IORESOURCE_IRQ, 0);
if (!r){
dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the IRQ resource!\n");
@@ -135,7 +135,7 @@ int kpc_dma_probe(struct platform_device *pldev)
goto err_kfree;
}
ldev->irq = r->start;
-
+
// Setup miscdev struct
dev = MKDEV(assigned_major_num, pldev->id);
ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
@@ -143,25 +143,25 @@ int kpc_dma_probe(struct platform_device *pldev)
dev_err(&ldev->pldev->dev, "kpc_dma_probe: device_create failed: %d\n", rv);
goto err_kfree;
}
-
+
// Setup the DMA engine
rv = setup_dma_engine(ldev, 30);
if (rv){
dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to setup_dma_engine: %d\n", rv);
goto err_misc_dereg;
}
-
+
// Setup the sysfs files
rv = sysfs_create_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
if (rv){
dev_err(&ldev->pldev->dev, "kpc_dma_probe: Failed to add sysfs files: %d\n", rv);
goto err_destroy_eng;
}
-
+
kpc_dma_add_device(ldev);
-
+
return 0;
-
+
err_destroy_eng:
destroy_dma_engine(ldev);
err_misc_dereg:
@@ -178,16 +178,16 @@ int kpc_dma_remove(struct platform_device *pldev)
struct kpc_dma_device *ldev = platform_get_drvdata(pldev);
if (!ldev)
return -ENXIO;
-
+
dev_dbg(&ldev->pldev->dev, "kpc_dma_remove(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
-
+
lock_engine(ldev);
sysfs_remove_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
destroy_dma_engine(ldev);
kpc_dma_del_device(ldev);
device_destroy(kpc_dma_class, MKDEV(assigned_major_num, ldev->pldev->id));
kfree(ldev);
-
+
return 0;
}
@@ -206,29 +206,29 @@ static
int __init kpc_dma_driver_init(void)
{
int err;
-
+
err = __register_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma", &kpc_dma_fops);
if (err < 0){
pr_err("Can't allocate a major number (%d) for kpc_dma (err = %d)\n", KPC_DMA_CHAR_MAJOR, err);
goto fail_chrdev_register;
}
assigned_major_num = err;
-
+
kpc_dma_class = class_create(THIS_MODULE, "kpc_dma");
err = PTR_ERR(kpc_dma_class);
if (IS_ERR(kpc_dma_class)){
pr_err("Can't create class kpc_dma (err = %d)\n", err);
goto fail_class_create;
}
-
+
err = platform_driver_register(&kpc_dma_plat_driver_i);
if (err){
pr_err("Can't register platform driver for kpc_dma (err = %d)\n", err);
goto fail_platdriver_register;
}
-
+
return err;
-
+
fail_platdriver_register:
class_destroy(kpc_dma_class);
fail_class_create:
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index ef913b7496e6..67c0ea31acab 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -27,23 +27,23 @@ struct kpc_dma_device {
struct device *kpc_dma_dev;
struct kobject kobj;
char name[16];
-
+
int dir; // DMA_FROM_DEVICE || DMA_TO_DEVICE
struct mutex sem;
unsigned int irq;
struct work_struct irq_work;
-
+
atomic_t open_count;
-
+
size_t accumulated_bytes;
u32 accumulated_flags;
-
+
// Descriptor "Pool" housekeeping
u32 desc_pool_cnt;
struct dma_pool *desc_pool;
struct kpc_dma_descriptor *desc_pool_first;
struct kpc_dma_descriptor *desc_pool_last;
-
+
struct kpc_dma_descriptor *desc_next;
struct kpc_dma_descriptor *desc_completed;
};
@@ -90,7 +90,7 @@ struct aio_cb_data {
unsigned char flags;
struct kiocb *kcb;
size_t len;
-
+
unsigned int page_count;
struct page **user_pages;
struct sg_table sgt;
@@ -119,10 +119,10 @@ struct kpc_dma_descriptor {
volatile u32 DescSystemAddrLS;
volatile u32 DescSystemAddrMS;
volatile u32 DescNextDescPtr;
-
+
dma_addr_t MyDMAAddr;
struct kpc_dma_descriptor *Next;
-
+
struct aio_cb_data *acd;
} __attribute__((packed));
// DescControlFlags:
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v3 2/8] Staging: kpc2000: kpc_dma: Resolve space errors around pointers and function declarations reported by checkpatch.
2019-05-13 10:26 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error " Vandana BN
@ 2019-05-13 10:26 ` Vandana BN
2019-05-13 10:26 ` [PATCH v3 3/8] Staging: kpc2000: kpc_dma: Resolve checkpatch space errors around brace '{','!' and open paranthesis '(' Vandana BN
` (6 subsequent siblings)
7 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 10:26 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resolves below errors reported by checkpatch
ERROR: "(foo*)" should be "(foo *)"
ERROR: "foo * bar" should be "foo *bar"
ERROR: "foo __init bar" should be "foo __init bar"
ERROR: "foo __exit bar" should be "foo __exit bar"
---
v2 - split changes to multiple patches
v3 - edit commit message
---
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/dma.c | 8 ++++----
drivers/staging/kpc2000/kpc_dma/fileops.c | 2 +-
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c | 12 ++++++------
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h | 6 +++---
4 files changed, 14 insertions(+), 14 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index ba987307d898..488b9b81debc 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -14,7 +14,7 @@
static
irqreturn_t ndd_irq_handler(int irq, void *dev_id)
{
- struct kpc_dma_device *ldev = (struct kpc_dma_device*)dev_id;
+ struct kpc_dma_device *ldev = (struct kpc_dma_device *)dev_id;
if ((GetEngineControl(ldev) & ENG_CTL_IRQ_ACTIVE) || (ldev->desc_completed->MyDMAAddr != GetEngineCompletePtr(ldev)))
schedule_work(&ldev->irq_work);
@@ -85,8 +85,8 @@ void start_dma_engine(struct kpc_dma_device *eng)
int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
{
u32 caps;
- struct kpc_dma_descriptor * cur;
- struct kpc_dma_descriptor * next;
+ struct kpc_dma_descriptor *cur;
+ struct kpc_dma_descriptor *next;
dma_addr_t next_handle;
dma_addr_t head_handle;
unsigned int i;
@@ -208,7 +208,7 @@ void stop_dma_engine(struct kpc_dma_device *eng)
void destroy_dma_engine(struct kpc_dma_device *eng)
{
- struct kpc_dma_descriptor * cur;
+ struct kpc_dma_descriptor *cur;
dma_addr_t cur_handle;
unsigned int i;
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 6c38c3f978c3..61927b313a26 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -55,7 +55,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
ldev = priv->ldev;
BUG_ON(ldev == NULL);
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void*)iov_base, iov_len, ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void *)iov_base, iov_len, ldev);
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd){
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index dece60e6e3f3..004d91b5ad00 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -21,7 +21,7 @@ static LIST_HEAD(kpc_dma_list);
/********** kpc_dma_list list management **********/
-struct kpc_dma_device * kpc_dma_lookup_device(int minor)
+struct kpc_dma_device *kpc_dma_lookup_device(int minor)
{
struct kpc_dma_device *c;
mutex_lock(&kpc_dma_mtx);
@@ -36,14 +36,14 @@ struct kpc_dma_device * kpc_dma_lookup_device(int minor)
return c;
}
-void kpc_dma_add_device(struct kpc_dma_device * ldev)
+void kpc_dma_add_device(struct kpc_dma_device *ldev)
{
mutex_lock(&kpc_dma_mtx);
list_add(&ldev->list, &kpc_dma_list);
mutex_unlock(&kpc_dma_mtx);
}
-void kpc_dma_del_device(struct kpc_dma_device * ldev)
+void kpc_dma_del_device(struct kpc_dma_device *ldev)
{
mutex_lock(&kpc_dma_mtx);
list_del(&ldev->list);
@@ -80,7 +80,7 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
}
DEVICE_ATTR(engine_regs, 0444, show_engine_regs, NULL);
-static const struct attribute * ndd_attr_list[] = {
+static const struct attribute *ndd_attr_list[] = {
&dev_attr_engine_regs.attr,
NULL,
};
@@ -203,7 +203,7 @@ struct platform_driver kpc_dma_plat_driver_i = {
};
static
-int __init kpc_dma_driver_init(void)
+int __init kpc_dma_driver_init(void)
{
int err;
@@ -239,7 +239,7 @@ int __init kpc_dma_driver_init(void)
module_init(kpc_dma_driver_init);
static
-void __exit kpc_dma_driver_exit(void)
+void __exit kpc_dma_driver_exit(void)
{
platform_driver_unregister(&kpc_dma_plat_driver_i);
class_destroy(kpc_dma_class);
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index 67c0ea31acab..8101601736a2 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -56,7 +56,7 @@ struct dev_private_data {
u64 user_sts;
};
-struct kpc_dma_device * kpc_dma_lookup_device(int minor);
+struct kpc_dma_device *kpc_dma_lookup_device(int minor);
extern struct file_operations kpc_dma_fops;
@@ -172,12 +172,12 @@ void SetClearEngineControl(struct kpc_dma_device *eng, u32 set_bits, u32 clear_
}
static inline
-void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor * desc)
+void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
{
writel(desc->MyDMAAddr, eng->eng_regs + 2);
}
static inline
-void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor * desc)
+void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
{
writel(desc->MyDMAAddr, eng->eng_regs + 3);
}
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v3 3/8] Staging: kpc2000: kpc_dma: Resolve checkpatch space errors around brace '{','!' and open paranthesis '('.
2019-05-13 10:26 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error " Vandana BN
2019-05-13 10:26 ` [PATCH v3 2/8] Staging: kpc2000: kpc_dma: Resolve space errors around pointers and function declarations " Vandana BN
@ 2019-05-13 10:26 ` Vandana BN
2019-05-13 10:26 ` [PATCH v3 4/8] Staging: kpc2000: kpc_dma: Resolve code indent and trailing statements on next line errors reported by checkpatch Vandana BN
` (5 subsequent siblings)
7 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 10:26 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resolves below errors reported by checkpath
ERROR: space required before the open brace '{'
ERROR: space prohibited after that '!' (ctx:BxW)
ERROR: space prohibited after that open parenthesis '('
---
v2 - split changes to multiple patches
v3 - edit commit message
---
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/dma.c | 28 +++++-----
drivers/staging/kpc2000/kpc_dma/fileops.c | 56 +++++++++----------
.../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 20 +++----
3 files changed, 52 insertions(+), 52 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index 488b9b81debc..2053316009bc 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -41,7 +41,7 @@ void ndd_irq_worker(struct work_struct *ws)
dev_dbg(&eng->pldev->dev, "Handling completed descriptor %p (acd = %p)\n", cur, cur->acd);
BUG_ON(cur == eng->desc_next); // Ordering failure.
- if (cur->DescControlFlags & DMA_DESC_CTL_SOP){
+ if (cur->DescControlFlags & DMA_DESC_CTL_SOP) {
eng->accumulated_bytes = 0;
eng->accumulated_flags = 0;
}
@@ -53,7 +53,7 @@ void ndd_irq_worker(struct work_struct *ws)
if (cur->DescStatusFlags & DMA_DESC_STS_SHORT)
eng->accumulated_flags |= ACD_FLAG_ENG_ACCUM_SHORT;
- if (cur->DescControlFlags & DMA_DESC_CTL_EOP){
+ if (cur->DescControlFlags & DMA_DESC_CTL_EOP) {
if (cur->acd)
transfer_complete_cb(cur->acd, eng->accumulated_bytes, eng->accumulated_flags | ACD_FLAG_DONE);
}
@@ -98,7 +98,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
if (WARN(!(caps & ENG_CAP_PRESENT), "setup_dma_engine() called for DMA Engine at %p which isn't present in hardware!\n", eng))
return -ENXIO;
- if (caps & ENG_CAP_DIRECTION){
+ if (caps & ENG_CAP_DIRECTION) {
eng->dir = DMA_FROM_DEVICE;
} else {
eng->dir = DMA_TO_DEVICE;
@@ -108,7 +108,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
eng->desc_pool = dma_pool_create("KPC DMA Descriptors", &eng->pldev->dev, sizeof(struct kpc_dma_descriptor), DMA_DESC_ALIGNMENT, 4096);
eng->desc_pool_first = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &head_handle);
- if (!eng->desc_pool_first){
+ if (!eng->desc_pool_first) {
dev_err(&eng->pldev->dev, "setup_dma_engine: couldn't allocate desc_pool_first!\n");
dma_pool_destroy(eng->desc_pool);
return -ENOMEM;
@@ -118,7 +118,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
clear_desc(eng->desc_pool_first);
cur = eng->desc_pool_first;
- for (i = 1 ; i < eng->desc_pool_cnt ; i++){
+ for (i = 1 ; i < eng->desc_pool_cnt ; i++) {
next = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &next_handle);
if (next == NULL)
goto done_alloc;
@@ -144,7 +144,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
// Grab IRQ line
rv = request_irq(eng->irq, ndd_irq_handler, IRQF_SHARED, KP_DRIVER_NAME_DMA_CONTROLLER, eng);
- if (rv){
+ if (rv) {
dev_err(&eng->pldev->dev, "setup_dma_engine: failed to request_irq: %d\n", rv);
return rv;
}
@@ -166,8 +166,8 @@ void stop_dma_engine(struct kpc_dma_device *eng)
// Wait for descriptor engine to finish current operaion
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & ENG_CTL_DMA_RUNNING){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & ENG_CTL_DMA_RUNNING) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "DMA_RUNNING still asserted!\n");
break;
}
@@ -178,8 +178,8 @@ void stop_dma_engine(struct kpc_dma_device *eng)
// Wait for reset request to be processed
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & (ENG_CTL_DMA_RUNNING | ENG_CTL_DMA_RESET_REQUEST)){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & (ENG_CTL_DMA_RUNNING | ENG_CTL_DMA_RESET_REQUEST)) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "ENG_CTL_DMA_RESET_REQUEST still asserted!\n");
break;
}
@@ -190,8 +190,8 @@ void stop_dma_engine(struct kpc_dma_device *eng)
// And wait for reset to complete
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & ENG_CTL_DMA_RESET){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & ENG_CTL_DMA_RESET) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "DMA_RESET still asserted!\n");
break;
}
@@ -217,7 +217,7 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
cur = eng->desc_pool_first;
cur_handle = eng->desc_pool_first->MyDMAAddr;
- for (i = 0 ; i < eng->desc_pool_cnt ; i++){
+ for (i = 0 ; i < eng->desc_pool_cnt ; i++) {
struct kpc_dma_descriptor *next = cur->Next;
dma_addr_t next_handle = cur->DescNextDescPtr;
dma_pool_free(eng->desc_pool, cur, cur_handle);
@@ -237,7 +237,7 @@ int count_descriptors_available(struct kpc_dma_device *eng)
{
u32 count = 0;
struct kpc_dma_descriptor *cur = eng->desc_next;
- while (cur != eng->desc_completed){
+ while (cur != eng->desc_completed) {
BUG_ON(cur == NULL);
count++;
cur = cur->Next;
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 61927b313a26..8dd948ef455f 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -58,7 +58,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void *)iov_base, iov_len, ldev);
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
- if (!acd){
+ if (!acd) {
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the aio data\n");
return -ENOMEM;
}
@@ -74,7 +74,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
// Allocate an array of page pointers
acd->user_pages = kzalloc(sizeof(struct page *) * acd->page_count, GFP_KERNEL);
- if (!acd->user_pages){
+ if (!acd->user_pages) {
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the page pointers\n");
rv = -ENOMEM;
goto err_alloc_userpages;
@@ -84,27 +84,27 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
down_read(¤t->mm->mmap_sem); /* get memory map semaphore */
rv = get_user_pages(iov_base, acd->page_count, FOLL_TOUCH | FOLL_WRITE | FOLL_GET, acd->user_pages, NULL);
up_read(¤t->mm->mmap_sem); /* release the semaphore */
- if (rv != acd->page_count){
+ if (rv != acd->page_count) {
dev_err(&priv->ldev->pldev->dev, "Couldn't get_user_pages (%ld)\n", rv);
goto err_get_user_pages;
}
// Allocate and setup the sg_table (scatterlist entries)
rv = sg_alloc_table_from_pages(&acd->sgt, acd->user_pages, acd->page_count, iov_base & (PAGE_SIZE-1), iov_len, GFP_KERNEL);
- if (rv){
+ if (rv) {
dev_err(&priv->ldev->pldev->dev, "Couldn't alloc sg_table (%ld)\n", rv);
goto err_alloc_sg_table;
}
// Setup the DMA mapping for all the sg entries
acd->mapped_entry_count = dma_map_sg(&ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, ldev->dir);
- if (acd->mapped_entry_count <= 0){
+ if (acd->mapped_entry_count <= 0) {
dev_err(&priv->ldev->pldev->dev, "Couldn't dma_map_sg (%d)\n", acd->mapped_entry_count);
goto err_dma_map_sg;
}
// Calculate how many descriptors are actually needed for this transfer.
- for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i){
+ for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i) {
desc_needed += count_parts_for_sge(sg);
}
@@ -113,13 +113,13 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
// Figoure out how many descriptors are available and return an error if there aren't enough
num_descrs_avail = count_descriptors_available(ldev);
dev_dbg(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
- if (desc_needed >= ldev->desc_pool_cnt){
+ if (desc_needed >= ldev->desc_pool_cnt) {
dev_warn(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d TOO MANY to ever complete!\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
rv = -EAGAIN;
unlock_engine(ldev);
goto err_descr_too_many;
}
- if (desc_needed > num_descrs_avail){
+ if (desc_needed > num_descrs_avail) {
dev_warn(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d Too many to complete right now.\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
rv = -EMSGSIZE;
unlock_engine(ldev);
@@ -129,13 +129,13 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
// Loop through all the sg table entries and fill out a descriptor for each one.
desc = ldev->desc_next;
card_addr = acd->priv->card_addr;
- for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i){
+ for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i) {
pcnt = count_parts_for_sge(sg);
- for (p = 0 ; p < pcnt ; p++){
+ for (p = 0 ; p < pcnt ; p++) {
// Fill out the descriptor
BUG_ON(desc == NULL);
clear_desc(desc);
- if (p != pcnt-1){
+ if (p != pcnt-1) {
desc->DescByteCount = 0x80000;
} else {
desc->DescByteCount = sg_dma_len(sg) - (p * 0x80000);
@@ -157,7 +157,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
desc->DescSystemAddrMS = (dma_addr & 0xFFFFFFFF00000000) >> 32;
user_ctl = acd->priv->user_ctl;
- if (i == acd->mapped_entry_count-1 && p == pcnt-1){
+ if (i == acd->mapped_entry_count-1 && p == pcnt-1) {
user_ctl = acd->priv->user_ctl_last;
}
desc->DescUserControlLS = (user_ctl & 0x00000000FFFFFFFF) >> 0;
@@ -179,13 +179,13 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
unlock_engine(ldev);
// If this is a synchronous kiocb, we need to put the calling process to sleep until the transfer is complete
- if (kcb == NULL || is_sync_kiocb(kcb)){
+ if (kcb == NULL || is_sync_kiocb(kcb)) {
rv = wait_for_completion_interruptible(&done);
// If the user aborted (rv == -ERESTARTSYS), we're no longer responsible for cleaning up the acd
- if (rv == -ERESTARTSYS){
+ if (rv == -ERESTARTSYS) {
acd->cpl = NULL;
}
- if (rv == 0){
+ if (rv == 0) {
rv = acd->len;
kfree(acd);
}
@@ -200,7 +200,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
sg_free_table(&acd->sgt);
err_dma_map_sg:
err_alloc_sg_table:
- for (i = 0 ; i < acd->page_count ; i++){
+ for (i = 0 ; i < acd->page_count ; i++) {
put_page(acd->user_pages[i]);
}
err_get_user_pages:
@@ -223,15 +223,15 @@ void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
dev_dbg(&acd->ldev->pldev->dev, "transfer_complete_cb(acd = [%p])\n", acd);
- for (i = 0 ; i < acd->page_count ; i++){
- if (!PageReserved(acd->user_pages[i])){
+ for (i = 0 ; i < acd->page_count ; i++) {
+ if (!PageReserved(acd->user_pages[i])) {
set_page_dirty(acd->user_pages[i]);
}
}
dma_unmap_sg(&acd->ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, acd->ldev->dir);
- for (i = 0 ; i < acd->page_count ; i++){
+ for (i = 0 ; i < acd->page_count ; i++) {
put_page(acd->user_pages[i]);
}
@@ -241,8 +241,8 @@ void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
acd->flags = flags;
- if (acd->kcb == NULL || is_sync_kiocb(acd->kcb)){
- if (acd->cpl){
+ if (acd->kcb == NULL || is_sync_kiocb(acd->kcb)) {
+ if (acd->cpl) {
complete(acd->cpl);
} else {
// There's no completion, so we're responsible for cleaning up the acd
@@ -265,7 +265,7 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
if (ldev == NULL)
return -ENODEV;
- if (! atomic_dec_and_test(&ldev->open_count)){
+ if (!atomic_dec_and_test(&ldev->open_count)) {
atomic_inc(&ldev->open_count);
return -EBUSY; /* already open */
}
@@ -294,9 +294,9 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
stop_dma_engine(eng);
cur = eng->desc_completed->Next;
- while (cur != eng->desc_next){
+ while (cur != eng->desc_next) {
dev_dbg(&eng->pldev->dev, "Aborting descriptor %p (acd = %p)\n", cur, cur->acd);
- if (cur->DescControlFlags & DMA_DESC_CTL_EOP){
+ if (cur->DescControlFlags & DMA_DESC_CTL_EOP) {
if (cur->acd)
transfer_complete_cb(cur->acd, 0, ACD_FLAG_ABORT);
}
@@ -334,7 +334,7 @@ ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
- if (iov_count != 1){
+ if (iov_count != 1) {
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_read() called with iov_count > 1!\n");
return -EFAULT;
}
@@ -353,7 +353,7 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
- if (iov_count != 1){
+ if (iov_count != 1) {
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_write() called with iov_count > 1!\n");
return -EFAULT;
}
@@ -365,7 +365,7 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
#endif
static
-ssize_t kpc_dma_read( struct file *filp, char __user *user_buf, size_t count, loff_t *ppos)
+ssize_t kpc_dma_read(struct file *filp, char __user *user_buf, size_t count, loff_t *ppos)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
@@ -394,7 +394,7 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
- switch (ioctl_num){
+ switch (ioctl_num) {
case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index 004d91b5ad00..0b8dcf046136 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -97,7 +97,7 @@ int kpc_dma_probe(struct platform_device *pldev)
dev_t dev;
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
- if (!ldev){
+ if (!ldev) {
dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
rv = -ENOMEM;
goto err_rv;
@@ -116,20 +116,20 @@ int kpc_dma_probe(struct platform_device *pldev)
// Get Engine regs resource
r = platform_get_resource(pldev, IORESOURCE_MEM, 0);
- if (!r){
+ if (!r) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the engine regs resource!\n");
rv = -ENXIO;
goto err_kfree;
}
ldev->eng_regs = ioremap_nocache(r->start, resource_size(r));
- if (!ldev->eng_regs){
+ if (!ldev->eng_regs) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to ioremap engine regs!\n");
rv = -ENXIO;
goto err_kfree;
}
r = platform_get_resource(pldev, IORESOURCE_IRQ, 0);
- if (!r){
+ if (!r) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the IRQ resource!\n");
rv = -ENXIO;
goto err_kfree;
@@ -139,21 +139,21 @@ int kpc_dma_probe(struct platform_device *pldev)
// Setup miscdev struct
dev = MKDEV(assigned_major_num, pldev->id);
ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
- if (IS_ERR(ldev->kpc_dma_dev)){
+ if (IS_ERR(ldev->kpc_dma_dev)) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: device_create failed: %d\n", rv);
goto err_kfree;
}
// Setup the DMA engine
rv = setup_dma_engine(ldev, 30);
- if (rv){
+ if (rv) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to setup_dma_engine: %d\n", rv);
goto err_misc_dereg;
}
// Setup the sysfs files
rv = sysfs_create_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
- if (rv){
+ if (rv) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: Failed to add sysfs files: %d\n", rv);
goto err_destroy_eng;
}
@@ -208,7 +208,7 @@ int __init kpc_dma_driver_init(void)
int err;
err = __register_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma", &kpc_dma_fops);
- if (err < 0){
+ if (err < 0) {
pr_err("Can't allocate a major number (%d) for kpc_dma (err = %d)\n", KPC_DMA_CHAR_MAJOR, err);
goto fail_chrdev_register;
}
@@ -216,13 +216,13 @@ int __init kpc_dma_driver_init(void)
kpc_dma_class = class_create(THIS_MODULE, "kpc_dma");
err = PTR_ERR(kpc_dma_class);
- if (IS_ERR(kpc_dma_class)){
+ if (IS_ERR(kpc_dma_class)) {
pr_err("Can't create class kpc_dma (err = %d)\n", err);
goto fail_class_create;
}
err = platform_driver_register(&kpc_dma_plat_driver_i);
- if (err){
+ if (err) {
pr_err("Can't register platform driver for kpc_dma (err = %d)\n", err);
goto fail_platdriver_register;
}
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v3 4/8] Staging: kpc2000: kpc_dma: Resolve code indent and trailing statements on next line errors reported by checkpatch.
2019-05-13 10:26 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error " Vandana BN
2019-05-13 10:26 ` [PATCH v3 2/8] Staging: kpc2000: kpc_dma: Resolve space errors around pointers and function declarations " Vandana BN
2019-05-13 10:26 ` [PATCH v3 3/8] Staging: kpc2000: kpc_dma: Resolve checkpatch space errors around brace '{','!' and open paranthesis '(' Vandana BN
@ 2019-05-13 10:26 ` Vandana BN
2019-05-13 10:26 ` [PATCH v3 5/8] Staging: kpc2000: kpc_dma: Resolve checkpath errors Macros in paranthesis & trailing statements on next line Vandana BN
` (4 subsequent siblings)
7 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 10:26 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch fixes code indentaion error reported by checkpath
ERROR: switch and case should be at the same indent
ERROR: trailing statements should be on next line
---
v2 - split changes to multiple patches
v3 - edit commit message
---
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/fileops.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 8dd948ef455f..c09147aaa4ef 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -395,10 +395,14 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
switch (ioctl_num) {
- case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
- case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
- case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
- case KND_IOCTL_GET_USER_STS: return priv->user_sts;
+ case KND_IOCTL_SET_CARD_ADDR:
+ priv->card_addr = ioctl_param; return priv->card_addr;
+ case KND_IOCTL_SET_USER_CTL:
+ priv->user_ctl = ioctl_param; return priv->user_ctl;
+ case KND_IOCTL_SET_USER_CTL_LAST:
+ priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
+ case KND_IOCTL_GET_USER_STS:
+ return priv->user_sts;
}
return -ENOTTY;
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v3 5/8] Staging: kpc2000: kpc_dma: Resolve checkpath errors Macros in paranthesis & trailing statements on next line.
2019-05-13 10:26 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error " Vandana BN
` (2 preceding siblings ...)
2019-05-13 10:26 ` [PATCH v3 4/8] Staging: kpc2000: kpc_dma: Resolve code indent and trailing statements on next line errors reported by checkpatch Vandana BN
@ 2019-05-13 10:26 ` Vandana BN
2019-05-13 10:26 ` [PATCH v3 6/8] Staging: kpc2000: kpc_dma: Resolve warning Missing blank line after declarations & labels not to be indented Vandana BN
` (3 subsequent siblings)
7 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 10:26 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch fixes below errors reported by checkpath
ERROR: Macros with complex values should be enclosed in parentheses
CHECK: Prefer using the BIT macro
ERROR: trailing statements should be on next line
ERROR: trailing statements should be on next line
---
v2 - split changes to multiple patches
v3 - edit commit message
---
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index 0b8dcf046136..e996ced77bd6 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -14,7 +14,7 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("Matt.Sickler@daktronics.com");
#define KPC_DMA_CHAR_MAJOR UNNAMED_MAJOR
-#define KPC_DMA_NUM_MINORS 1 << MINORBITS
+#define KPC_DMA_NUM_MINORS BIT(MINORBITS)
static DEFINE_MUTEX(kpc_dma_mtx);
static int assigned_major_num;
static LIST_HEAD(kpc_dma_list);
@@ -55,9 +55,11 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
{
struct kpc_dma_device *ldev;
struct platform_device *pldev = to_platform_device(dev);
- if (!pldev) return 0;
+ if (!pldev)
+ return 0;
ldev = platform_get_drvdata(pldev);
- if (!ldev) return 0;
+ if (!ldev)
+ return 0;
return scnprintf(buf, PAGE_SIZE,
"EngineControlStatus = 0x%08x\n"
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v3 6/8] Staging: kpc2000: kpc_dma: Resolve warning Missing blank line after declarations & labels not to be indented.
2019-05-13 10:26 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error " Vandana BN
` (3 preceding siblings ...)
2019-05-13 10:26 ` [PATCH v3 5/8] Staging: kpc2000: kpc_dma: Resolve checkpath errors Macros in paranthesis & trailing statements on next line Vandana BN
@ 2019-05-13 10:26 ` Vandana BN
2019-05-13 10:26 ` [PATCH v3 7/8] Staging: kpc2000: kpc_dma: Resolve warning to use __func__ insted of funtion name reported by checkpatch Vandana BN
` (2 subsequent siblings)
7 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 10:26 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resloves below warnings reported by checkpath in kpc_dma
WARNING: Missing a blank line after declarations
WARNING: labels should not be indented
CHECK: Please don't use multiple blank lines
CHECK: Please use a blank line after function/struct/union/enum
declarations
---
v2 - split changes to multiple patches
v3 - edit commit message
---
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/dma.c | 8 +++++---
drivers/staging/kpc2000/kpc_dma/fileops.c | 11 ++++++++++-
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c | 15 ++++++++-------
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h | 8 ++++++--
4 files changed, 29 insertions(+), 13 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index 2053316009bc..ac842fa38c64 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -27,6 +27,7 @@ void ndd_irq_worker(struct work_struct *ws)
{
struct kpc_dma_descriptor *cur;
struct kpc_dma_device *eng = container_of(ws, struct kpc_dma_device, irq_work);
+
lock_engine(eng);
if (GetEngineCompletePtr(eng) == 0)
@@ -67,7 +68,6 @@ void ndd_irq_worker(struct work_struct *ws)
unlock_engine(eng);
}
-
/********** DMA Engine Init/Teardown **********/
void start_dma_engine(struct kpc_dma_device *eng)
{
@@ -91,6 +91,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
dma_addr_t head_handle;
unsigned int i;
int rv;
+
dev_dbg(&eng->pldev->dev, "Setting up DMA engine [%p]\n", eng);
caps = GetEngineCapabilities(eng);
@@ -159,6 +160,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
void stop_dma_engine(struct kpc_dma_device *eng)
{
unsigned long timeout;
+
dev_dbg(&eng->pldev->dev, "Destroying DMA engine [%p]\n", eng);
// Disable the descriptor engine
@@ -220,6 +222,7 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
for (i = 0 ; i < eng->desc_pool_cnt ; i++) {
struct kpc_dma_descriptor *next = cur->Next;
dma_addr_t next_handle = cur->DescNextDescPtr;
+
dma_pool_free(eng->desc_pool, cur, cur_handle);
cur_handle = next_handle;
cur = next;
@@ -230,13 +233,12 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
free_irq(eng->irq, eng);
}
-
-
/********** Helper Functions **********/
int count_descriptors_available(struct kpc_dma_device *eng)
{
u32 count = 0;
struct kpc_dma_descriptor *cur = eng->desc_next;
+
while (cur != eng->desc_completed) {
BUG_ON(cur == NULL);
count++;
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index c09147aaa4ef..13c0e532437e 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -21,6 +21,7 @@ unsigned int count_pages(unsigned long iov_base, size_t iov_len)
{
unsigned long first = (iov_base & PAGE_MASK) >> PAGE_SHIFT;
unsigned long last = ((iov_base+iov_len-1) & PAGE_MASK) >> PAGE_SHIFT;
+
return last - first + 1;
}
@@ -28,6 +29,7 @@ static inline
unsigned int count_parts_for_sge(struct scatterlist *sg)
{
unsigned int sg_length = sg_dma_len(sg);
+
sg_length += (0x80000-1);
return (sg_length / 0x80000);
}
@@ -262,6 +264,7 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
{
struct dev_private_data *priv;
struct kpc_dma_device *ldev = kpc_dma_lookup_device(iminor(inode));
+
if (ldev == NULL)
return -ENODEV;
@@ -287,6 +290,7 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
struct kpc_dma_descriptor *cur;
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
struct kpc_dma_device *eng = priv->ldev;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_close(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", inode, filp, priv, priv->ldev);
lock_engine(eng);
@@ -321,6 +325,7 @@ static
int kpc_dma_aio_cancel(struct kiocb *kcb)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_cancel(kcb = [%p]) priv = [%p], ldev = [%p]\n", kcb, priv, priv->ldev);
return 0;
}
@@ -329,6 +334,7 @@ static
ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned long iov_count, loff_t pos)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_read(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
@@ -348,6 +354,7 @@ static
ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned long iov_count, loff_t pos)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_write(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
@@ -368,6 +375,7 @@ static
ssize_t kpc_dma_read(struct file *filp, char __user *user_buf, size_t count, loff_t *ppos)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
@@ -380,6 +388,7 @@ static
ssize_t kpc_dma_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *ppos)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_write(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
@@ -392,6 +401,7 @@ static
long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioctl_param)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
switch (ioctl_num) {
@@ -408,7 +418,6 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
return -ENOTTY;
}
-
struct file_operations kpc_dma_fops = {
.owner = THIS_MODULE,
.open = kpc_dma_open,
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index e996ced77bd6..135428e62f8e 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -19,11 +19,11 @@ static DEFINE_MUTEX(kpc_dma_mtx);
static int assigned_major_num;
static LIST_HEAD(kpc_dma_list);
-
/********** kpc_dma_list list management **********/
struct kpc_dma_device *kpc_dma_lookup_device(int minor)
{
struct kpc_dma_device *c;
+
mutex_lock(&kpc_dma_mtx);
list_for_each_entry(c, &kpc_dma_list, list) {
if (c->pldev->id == minor) {
@@ -31,7 +31,7 @@ struct kpc_dma_device *kpc_dma_lookup_device(int minor)
}
}
c = NULL; // not-found case
- out:
+out:
mutex_unlock(&kpc_dma_mtx);
return c;
}
@@ -55,6 +55,7 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
{
struct kpc_dma_device *ldev;
struct platform_device *pldev = to_platform_device(dev);
+
if (!pldev)
return 0;
ldev = platform_get_drvdata(pldev);
@@ -89,7 +90,6 @@ static const struct attribute *ndd_attr_list[] = {
struct class *kpc_dma_class;
-
/********** Platform Driver Functions **********/
static
int kpc_dma_probe(struct platform_device *pldev)
@@ -99,6 +99,7 @@ int kpc_dma_probe(struct platform_device *pldev)
dev_t dev;
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
+
if (!ldev) {
dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
rv = -ENOMEM;
@@ -178,6 +179,7 @@ static
int kpc_dma_remove(struct platform_device *pldev)
{
struct kpc_dma_device *ldev = platform_get_drvdata(pldev);
+
if (!ldev)
return -ENXIO;
@@ -193,7 +195,6 @@ int kpc_dma_remove(struct platform_device *pldev)
return 0;
}
-
/********** Driver Functions **********/
struct platform_driver kpc_dma_plat_driver_i = {
.probe = kpc_dma_probe,
@@ -231,11 +232,11 @@ int __init kpc_dma_driver_init(void)
return err;
- fail_platdriver_register:
+fail_platdriver_register:
class_destroy(kpc_dma_class);
- fail_class_create:
+fail_class_create:
__unregister_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma");
- fail_chrdev_register:
+fail_chrdev_register:
return err;
}
module_init(kpc_dma_driver_init);
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index 8101601736a2..cf781940ac1b 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -18,7 +18,6 @@
#include <linux/bitops.h>
#include "../kpc.h"
-
struct kp2000_device;
struct kpc_dma_device {
struct list_head list;
@@ -157,15 +156,18 @@ void WriteEngineControl(struct kpc_dma_device *eng, u32 value)
{
writel(value, eng->eng_regs + 1);
}
+
static inline
u32 GetEngineControl(struct kpc_dma_device *eng)
{
return readl(eng->eng_regs + 1);
}
+
static inline
void SetClearEngineControl(struct kpc_dma_device *eng, u32 set_bits, u32 clear_bits)
{
u32 val = GetEngineControl(eng);
+
val |= set_bits;
val &= ~clear_bits;
WriteEngineControl(eng, val);
@@ -176,16 +178,19 @@ void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *de
{
writel(desc->MyDMAAddr, eng->eng_regs + 2);
}
+
static inline
void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
{
writel(desc->MyDMAAddr, eng->eng_regs + 3);
}
+
static inline
void ClearEngineCompletePtr(struct kpc_dma_device *eng)
{
writel(0, eng->eng_regs + 4);
}
+
static inline
u32 GetEngineCompletePtr(struct kpc_dma_device *eng)
{
@@ -206,7 +211,6 @@ void unlock_engine(struct kpc_dma_device *eng)
mutex_unlock(&eng->sem);
}
-
/// Shared Functions
void start_dma_engine(struct kpc_dma_device *eng);
int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt);
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v3 7/8] Staging: kpc2000: kpc_dma: Resolve warning to use __func__ insted of funtion name reported by checkpatch.
2019-05-13 10:26 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error " Vandana BN
` (4 preceding siblings ...)
2019-05-13 10:26 ` [PATCH v3 6/8] Staging: kpc2000: kpc_dma: Resolve warning Missing blank line after declarations & labels not to be indented Vandana BN
@ 2019-05-13 10:26 ` Vandana BN
2019-05-13 10:26 ` [PATCH v3 8/8] Staging: kpc2000: kpc_dma: Resolve cast warning and use const for file_operation Vandana BN
2019-05-13 10:49 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error reported by checkpatch Dan Carpenter
7 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 10:26 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resolves warnings to use __func__ insted of funtion name.
WARNING: Prefer using '"%s...", __func__' to using 'setup_dma_engine', this function's name, in a string
---
v2 - split changes to multiple patches
v3 - edit commit message
---
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/dma.c | 6 ++---
drivers/staging/kpc2000/kpc_dma/fileops.c | 26 +++++++++----------
.../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 18 ++++++-------
3 files changed, 25 insertions(+), 25 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index ac842fa38c64..13687ab3e9c7 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -96,7 +96,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
caps = GetEngineCapabilities(eng);
- if (WARN(!(caps & ENG_CAP_PRESENT), "setup_dma_engine() called for DMA Engine at %p which isn't present in hardware!\n", eng))
+ if (WARN(!(caps & ENG_CAP_PRESENT), "%s() called for DMA Engine at %p which isn't present in hardware!\n", __func__, eng))
return -ENXIO;
if (caps & ENG_CAP_DIRECTION) {
@@ -110,7 +110,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
eng->desc_pool_first = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &head_handle);
if (!eng->desc_pool_first) {
- dev_err(&eng->pldev->dev, "setup_dma_engine: couldn't allocate desc_pool_first!\n");
+ dev_err(&eng->pldev->dev, "%s: couldn't allocate desc_pool_first!\n", __func__);
dma_pool_destroy(eng->desc_pool);
return -ENOMEM;
}
@@ -146,7 +146,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
// Grab IRQ line
rv = request_irq(eng->irq, ndd_irq_handler, IRQF_SHARED, KP_DRIVER_NAME_DMA_CONTROLLER, eng);
if (rv) {
- dev_err(&eng->pldev->dev, "setup_dma_engine: failed to request_irq: %d\n", rv);
+ dev_err(&eng->pldev->dev, "%s: failed to request_irq: %d\n", __func__, rv);
return rv;
}
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 13c0e532437e..c21672ea2b4f 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -57,7 +57,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
ldev = priv->ldev;
BUG_ON(ldev == NULL);
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void *)iov_base, iov_len, ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", __func__, priv, kcb, (void *)iov_base, iov_len, ldev);
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd) {
@@ -209,7 +209,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
kfree(acd->user_pages);
err_alloc_userpages:
kfree(acd);
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer returning with error %ld\n", rv);
+ dev_dbg(&priv->ldev->pldev->dev, "%s returning with error %ld\n", __func__, rv);
return rv;
}
@@ -223,7 +223,7 @@ void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
BUG_ON(acd->ldev == NULL);
BUG_ON(acd->ldev->pldev == NULL);
- dev_dbg(&acd->ldev->pldev->dev, "transfer_complete_cb(acd = [%p])\n", acd);
+ dev_dbg(&acd->ldev->pldev->dev, "%s(acd = [%p])\n", __func__, acd);
for (i = 0 ; i < acd->page_count ; i++) {
if (!PageReserved(acd->user_pages[i])) {
@@ -280,7 +280,7 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
priv->ldev = ldev;
filp->private_data = priv;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_open(inode = [%p], filp = [%p]) priv = [%p] ldev = [%p]\n", inode, filp, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(inode = [%p], filp = [%p]) priv = [%p] ldev = [%p]\n", __func__, inode, filp, priv, priv->ldev);
return 0;
}
@@ -291,7 +291,7 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
struct kpc_dma_device *eng = priv->ldev;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_close(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", inode, filp, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", __func__, inode, filp, priv, priv->ldev);
lock_engine(eng);
@@ -326,7 +326,7 @@ int kpc_dma_aio_cancel(struct kiocb *kcb)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_cancel(kcb = [%p]) priv = [%p], ldev = [%p]\n", kcb, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p]) priv = [%p], ldev = [%p]\n", __func__, kcb, priv, priv->ldev);
return 0;
}
@@ -335,13 +335,13 @@ ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_read(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", __func__, kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
if (iov_count != 1) {
- dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_read() called with iov_count > 1!\n");
+ dev_err(&priv->ldev->pldev->dev, "%s() called with iov_count > 1!\n", __func__);
return -EFAULT;
}
@@ -355,13 +355,13 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_write(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", __func__, kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
if (iov_count != 1) {
- dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_write() called with iov_count > 1!\n");
+ dev_err(&priv->ldev->pldev->dev, "%s() called with iov_count > 1!\n", __func__);
return -EFAULT;
}
@@ -376,7 +376,7 @@ ssize_t kpc_dma_read(struct file *filp, char __user *user_buf, size_t cou
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", __func__, filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
@@ -389,7 +389,7 @@ ssize_t kpc_dma_write(struct file *filp, const char __user *user_buf, size_t co
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_write(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", __func__, filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
@@ -402,7 +402,7 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", __func__, filp, ioctl_num, ioctl_param, priv, priv->ldev);
switch (ioctl_num) {
case KND_IOCTL_SET_CARD_ADDR:
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index 135428e62f8e..cda057569163 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -101,12 +101,12 @@ int kpc_dma_probe(struct platform_device *pldev)
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
if (!ldev) {
- dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
+ dev_err(&pldev->dev, "%s: unable to kzalloc space for kpc_dma_device\n", __func__);
rv = -ENOMEM;
goto err_rv;
}
- dev_dbg(&pldev->dev, "kpc_dma_probe(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
+ dev_dbg(&pldev->dev, "%s(pldev = [%p]) ldev = [%p]\n", __func__, pldev, ldev);
INIT_LIST_HEAD(&ldev->list);
@@ -120,20 +120,20 @@ int kpc_dma_probe(struct platform_device *pldev)
// Get Engine regs resource
r = platform_get_resource(pldev, IORESOURCE_MEM, 0);
if (!r) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the engine regs resource!\n");
+ dev_err(&ldev->pldev->dev, "%s: didn't get the engine regs resource!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
ldev->eng_regs = ioremap_nocache(r->start, resource_size(r));
if (!ldev->eng_regs) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to ioremap engine regs!\n");
+ dev_err(&ldev->pldev->dev, "%s: failed to ioremap engine regs!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
r = platform_get_resource(pldev, IORESOURCE_IRQ, 0);
if (!r) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the IRQ resource!\n");
+ dev_err(&ldev->pldev->dev, "%s: didn't get the IRQ resource!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
@@ -143,21 +143,21 @@ int kpc_dma_probe(struct platform_device *pldev)
dev = MKDEV(assigned_major_num, pldev->id);
ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
if (IS_ERR(ldev->kpc_dma_dev)) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: device_create failed: %d\n", rv);
+ dev_err(&ldev->pldev->dev, "%s: device_create failed: %d\n", __func__, rv);
goto err_kfree;
}
// Setup the DMA engine
rv = setup_dma_engine(ldev, 30);
if (rv) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to setup_dma_engine: %d\n", rv);
+ dev_err(&ldev->pldev->dev, "%s: failed to setup_dma_engine: %d\n", __func__, rv);
goto err_misc_dereg;
}
// Setup the sysfs files
rv = sysfs_create_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
if (rv) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: Failed to add sysfs files: %d\n", rv);
+ dev_err(&ldev->pldev->dev, "%s: Failed to add sysfs files: %d\n", __func__, rv);
goto err_destroy_eng;
}
@@ -183,7 +183,7 @@ int kpc_dma_remove(struct platform_device *pldev)
if (!ldev)
return -ENXIO;
- dev_dbg(&ldev->pldev->dev, "kpc_dma_remove(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
+ dev_dbg(&ldev->pldev->dev, "%s(pldev = [%p]) ldev = [%p]\n", __func__, pldev, ldev);
lock_engine(ldev);
sysfs_remove_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v3 8/8] Staging: kpc2000: kpc_dma: Resolve cast warning and use const for file_operation
2019-05-13 10:26 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error " Vandana BN
` (5 preceding siblings ...)
2019-05-13 10:26 ` [PATCH v3 7/8] Staging: kpc2000: kpc_dma: Resolve warning to use __func__ insted of funtion name reported by checkpatch Vandana BN
@ 2019-05-13 10:26 ` Vandana BN
2019-05-13 10:49 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error reported by checkpatch Dan Carpenter
7 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 10:26 UTC (permalink / raw)
To: gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This Patch resolves unnecessary cast warning and const file_operations
reported by checkpath.pl
WARNING: unnecessary cast may hide bugs
WARNING: struct file_operations should normally be const
---
v2 - split changes to multiple patches
v3 - edit commit message
---
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
drivers/staging/kpc2000/kpc_dma/fileops.c | 4 ++--
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index c21672ea2b4f..54a1419728ce 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -59,7 +59,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
dev_dbg(&priv->ldev->pldev->dev, "%s(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", __func__, priv, kcb, (void *)iov_base, iov_len, ldev);
- acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
+ acd = kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd) {
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the aio data\n");
return -ENOMEM;
@@ -418,7 +418,7 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
return -ENOTTY;
}
-struct file_operations kpc_dma_fops = {
+const struct file_operations kpc_dma_fops = {
.owner = THIS_MODULE,
.open = kpc_dma_open,
.release = kpc_dma_close,
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index cf781940ac1b..ee47f43e71cf 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -57,7 +57,7 @@ struct dev_private_data {
struct kpc_dma_device *kpc_dma_lookup_device(int minor);
-extern struct file_operations kpc_dma_fops;
+extern const struct file_operations kpc_dma_fops;
#define ENG_CAP_PRESENT 0x00000001
#define ENG_CAP_DIRECTION 0x00000002
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* Re: [PATCH v2 2/8] Staging: kpc2000: kpc_dma: Resolve coding style errors reported by checkpatch.
2019-05-13 8:42 ` Greg KH
@ 2019-05-13 10:43 ` Vandana BN
0 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 10:43 UTC (permalink / raw)
To: Greg KH; +Cc: devel, linux-kernel, lukas.bulwahn, linux-kernel-mentees, skhan
On 13/05/19 2:12 PM, Greg KH wrote:
> On Mon, May 13, 2019 at 05:09:54AM +0530, Vandana BN wrote:
>> This patch resolves below errors reported by checkpatch
>> ERROR: "(foo*)" should be "(foo *)"
>> ERROR: "foo * bar" should be "foo *bar"
>> ERROR: "foo __init bar" should be "foo __init bar"
>> ERROR: "foo __exit bar" should be "foo __exit bar"
>>
>> Signed-off-by: Vandana BN <bnvandana@gmail.com>
> Better...
>
> But your subject lines are almost all the same, with some being
> identical to others, yet you are doing different things in each of the
> patch.
>
> So please provide a better subject line saying, in a unique way, exactly
> what you are doing here.
>
> thanks,
>
> greg k-h
Thanks, have sent another patch set with better subject lines.
regards,
Vandana.
^ permalink raw reply [flat|nested] 32+ messages in thread
* Re: [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error reported by checkpatch
2019-05-13 10:26 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error " Vandana BN
` (6 preceding siblings ...)
2019-05-13 10:26 ` [PATCH v3 8/8] Staging: kpc2000: kpc_dma: Resolve cast warning and use const for file_operation Vandana BN
@ 2019-05-13 10:49 ` Dan Carpenter
2019-05-13 12:00 ` Vandana BN
7 siblings, 1 reply; 32+ messages in thread
From: Dan Carpenter @ 2019-05-13 10:49 UTC (permalink / raw)
To: Vandana BN
Cc: gregkh, devel, linux-kernel, lukas.bulwahn, linux-kernel-mentees, skhan
On Mon, May 13, 2019 at 03:56:15PM +0530, Vandana BN wrote:
> Resolve trailing whitespace error from checkpatch.pl
> ERROR: trailing whitespace
> ---
> v2-split changes to multiple patches
> v3 - edit commit message
> ---
>
> Signed-off-by: Vandana BN <bnvandana@gmail.com>
> ---
The Signed off by has to be before the first --- cut off line.
Everything after the cut off is removed from the commit message.
> drivers/staging/kpc2000/kpc_dma/dma.c | 86 ++++++-------
> drivers/staging/kpc2000/kpc_dma/fileops.c | 114 +++++++++---------
> .../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 46 +++----
> .../staging/kpc2000/kpc_dma/kpc_dma_driver.h | 16 +--
> 4 files changed, 131 insertions(+), 131 deletions(-)
>
regards,
dan carpenter
^ permalink raw reply [flat|nested] 32+ messages in thread
* Re: [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error reported by checkpatch
2019-05-13 10:49 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error reported by checkpatch Dan Carpenter
@ 2019-05-13 12:00 ` Vandana BN
0 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 12:00 UTC (permalink / raw)
To: Dan Carpenter
Cc: gregkh, devel, linux-kernel, lukas.bulwahn, linux-kernel-mentees, skhan
oh ok.. thanks i will correct it.
On 13/05/19 4:19 PM, Dan Carpenter wrote:
> The Signed off by has to be before the first --- cut off line.
> Everything after the cut off is removed from the commit message.
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH v4 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error reported by checkpatch
2019-05-10 19:38 [PATCH] Staging: kpc2000: kpc_dma: resolve checkpath errors and warnings Vandana BN
` (3 preceding siblings ...)
2019-05-13 10:26 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error " Vandana BN
@ 2019-05-13 13:43 ` Vandana BN
2019-05-13 13:43 ` [PATCH v4 2/8] Staging: kpc2000: kpc_dma: Resolve space errors around pointers and function declarations " Vandana BN
` (6 more replies)
4 siblings, 7 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 13:43 UTC (permalink / raw)
To: dan.carpenter, gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
Resolve trailing whitespace error from checkpatch.pl
ERROR: trailing whitespace
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
v2 - split changes to multiple patches
v3 - edit commit message, subject line
v4 - edit commit message
drivers/staging/kpc2000/kpc_dma/dma.c | 86 ++++++-------
drivers/staging/kpc2000/kpc_dma/fileops.c | 114 +++++++++---------
.../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 46 +++----
.../staging/kpc2000/kpc_dma/kpc_dma_driver.h | 16 +--
4 files changed, 131 insertions(+), 131 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index 6959bac11388..ba987307d898 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -15,10 +15,10 @@ static
irqreturn_t ndd_irq_handler(int irq, void *dev_id)
{
struct kpc_dma_device *ldev = (struct kpc_dma_device*)dev_id;
-
+
if ((GetEngineControl(ldev) & ENG_CTL_IRQ_ACTIVE) || (ldev->desc_completed->MyDMAAddr != GetEngineCompletePtr(ldev)))
schedule_work(&ldev->irq_work);
-
+
return IRQ_HANDLED;
}
@@ -28,42 +28,42 @@ void ndd_irq_worker(struct work_struct *ws)
struct kpc_dma_descriptor *cur;
struct kpc_dma_device *eng = container_of(ws, struct kpc_dma_device, irq_work);
lock_engine(eng);
-
+
if (GetEngineCompletePtr(eng) == 0)
goto out;
-
+
if (eng->desc_completed->MyDMAAddr == GetEngineCompletePtr(eng))
goto out;
-
+
cur = eng->desc_completed;
do {
cur = cur->Next;
dev_dbg(&eng->pldev->dev, "Handling completed descriptor %p (acd = %p)\n", cur, cur->acd);
BUG_ON(cur == eng->desc_next); // Ordering failure.
-
+
if (cur->DescControlFlags & DMA_DESC_CTL_SOP){
eng->accumulated_bytes = 0;
eng->accumulated_flags = 0;
}
-
+
eng->accumulated_bytes += cur->DescByteCount;
if (cur->DescStatusFlags & DMA_DESC_STS_ERROR)
eng->accumulated_flags |= ACD_FLAG_ENG_ACCUM_ERROR;
-
+
if (cur->DescStatusFlags & DMA_DESC_STS_SHORT)
eng->accumulated_flags |= ACD_FLAG_ENG_ACCUM_SHORT;
-
+
if (cur->DescControlFlags & DMA_DESC_CTL_EOP){
if (cur->acd)
transfer_complete_cb(cur->acd, eng->accumulated_bytes, eng->accumulated_flags | ACD_FLAG_DONE);
}
-
+
eng->desc_completed = cur;
} while (cur->MyDMAAddr != GetEngineCompletePtr(eng));
-
+
out:
SetClearEngineControl(eng, ENG_CTL_IRQ_ACTIVE, 0);
-
+
unlock_engine(eng);
}
@@ -73,12 +73,12 @@ void start_dma_engine(struct kpc_dma_device *eng)
{
eng->desc_next = eng->desc_pool_first;
eng->desc_completed = eng->desc_pool_last;
-
+
// Setup the engine pointer registers
SetEngineNextPtr(eng, eng->desc_pool_first);
SetEngineSWPtr(eng, eng->desc_pool_first);
ClearEngineCompletePtr(eng);
-
+
WriteEngineControl(eng, ENG_CTL_DMA_ENABLE | ENG_CTL_IRQ_ENABLE);
}
@@ -92,67 +92,67 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
unsigned int i;
int rv;
dev_dbg(&eng->pldev->dev, "Setting up DMA engine [%p]\n", eng);
-
+
caps = GetEngineCapabilities(eng);
-
+
if (WARN(!(caps & ENG_CAP_PRESENT), "setup_dma_engine() called for DMA Engine at %p which isn't present in hardware!\n", eng))
return -ENXIO;
-
+
if (caps & ENG_CAP_DIRECTION){
eng->dir = DMA_FROM_DEVICE;
} else {
eng->dir = DMA_TO_DEVICE;
}
-
+
eng->desc_pool_cnt = desc_cnt;
eng->desc_pool = dma_pool_create("KPC DMA Descriptors", &eng->pldev->dev, sizeof(struct kpc_dma_descriptor), DMA_DESC_ALIGNMENT, 4096);
-
+
eng->desc_pool_first = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &head_handle);
if (!eng->desc_pool_first){
dev_err(&eng->pldev->dev, "setup_dma_engine: couldn't allocate desc_pool_first!\n");
dma_pool_destroy(eng->desc_pool);
return -ENOMEM;
}
-
+
eng->desc_pool_first->MyDMAAddr = head_handle;
clear_desc(eng->desc_pool_first);
-
+
cur = eng->desc_pool_first;
for (i = 1 ; i < eng->desc_pool_cnt ; i++){
next = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &next_handle);
if (next == NULL)
goto done_alloc;
-
+
clear_desc(next);
next->MyDMAAddr = next_handle;
-
+
cur->DescNextDescPtr = next_handle;
cur->Next = next;
cur = next;
}
-
+
done_alloc:
// Link the last descriptor back to the first, so it's a circular linked list
cur->Next = eng->desc_pool_first;
cur->DescNextDescPtr = eng->desc_pool_first->MyDMAAddr;
-
+
eng->desc_pool_last = cur;
eng->desc_completed = eng->desc_pool_last;
-
+
// Setup work queue
INIT_WORK(&eng->irq_work, ndd_irq_worker);
-
+
// Grab IRQ line
rv = request_irq(eng->irq, ndd_irq_handler, IRQF_SHARED, KP_DRIVER_NAME_DMA_CONTROLLER, eng);
if (rv){
dev_err(&eng->pldev->dev, "setup_dma_engine: failed to request_irq: %d\n", rv);
return rv;
}
-
+
// Turn on the engine!
start_dma_engine(eng);
unlock_engine(eng);
-
+
return 0;
}
@@ -160,10 +160,10 @@ void stop_dma_engine(struct kpc_dma_device *eng)
{
unsigned long timeout;
dev_dbg(&eng->pldev->dev, "Destroying DMA engine [%p]\n", eng);
-
+
// Disable the descriptor engine
WriteEngineControl(eng, 0);
-
+
// Wait for descriptor engine to finish current operaion
timeout = jiffies + (HZ / 2);
while (GetEngineControl(eng) & ENG_CTL_DMA_RUNNING){
@@ -172,10 +172,10 @@ void stop_dma_engine(struct kpc_dma_device *eng)
break;
}
}
-
+
// Request a reset
WriteEngineControl(eng, ENG_CTL_DMA_RESET_REQUEST);
-
+
// Wait for reset request to be processed
timeout = jiffies + (HZ / 2);
while (GetEngineControl(eng) & (ENG_CTL_DMA_RUNNING | ENG_CTL_DMA_RESET_REQUEST)){
@@ -184,10 +184,10 @@ void stop_dma_engine(struct kpc_dma_device *eng)
break;
}
}
-
+
// Request a reset
WriteEngineControl(eng, ENG_CTL_DMA_RESET);
-
+
// And wait for reset to complete
timeout = jiffies + (HZ / 2);
while (GetEngineControl(eng) & ENG_CTL_DMA_RESET){
@@ -196,12 +196,12 @@ void stop_dma_engine(struct kpc_dma_device *eng)
break;
}
}
-
+
// Clear any persistent bits just to make sure there is no residue from the reset
SetClearEngineControl(eng, (ENG_CTL_IRQ_ACTIVE | ENG_CTL_DESC_COMPLETE | ENG_CTL_DESC_ALIGN_ERR | ENG_CTL_DESC_FETCH_ERR | ENG_CTL_SW_ABORT_ERR | ENG_CTL_DESC_CHAIN_END | ENG_CTL_DMA_WAITING_PERSIST), 0);
-
+
// Reset performance counters
-
+
// Completely disable the engine
WriteEngineControl(eng, 0);
}
@@ -211,12 +211,12 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
struct kpc_dma_descriptor * cur;
dma_addr_t cur_handle;
unsigned int i;
-
+
stop_dma_engine(eng);
-
+
cur = eng->desc_pool_first;
cur_handle = eng->desc_pool_first->MyDMAAddr;
-
+
for (i = 0 ; i < eng->desc_pool_cnt ; i++){
struct kpc_dma_descriptor *next = cur->Next;
dma_addr_t next_handle = cur->DescNextDescPtr;
@@ -224,9 +224,9 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
cur_handle = next_handle;
cur = next;
}
-
+
dma_pool_destroy(eng->desc_pool);
-
+
free_irq(eng->irq, eng);
}
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 5741d2b49a7d..6c38c3f978c3 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -50,20 +50,20 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
u64 card_addr;
u64 dma_addr;
u64 user_ctl;
-
+
BUG_ON(priv == NULL);
ldev = priv->ldev;
BUG_ON(ldev == NULL);
-
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void*)iov_base, iov_len, ldev);
-
+
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd){
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the aio data\n");
return -ENOMEM;
}
memset(acd, 0x66, sizeof(struct aio_cb_data));
-
+
acd->priv = priv;
acd->ldev = priv->ldev;
acd->cpl = &done;
@@ -71,7 +71,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
acd->kcb = kcb;
acd->len = iov_len;
acd->page_count = count_pages(iov_base, iov_len);
-
+
// Allocate an array of page pointers
acd->user_pages = kzalloc(sizeof(struct page *) * acd->page_count, GFP_KERNEL);
if (!acd->user_pages){
@@ -79,7 +79,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
rv = -ENOMEM;
goto err_alloc_userpages;
}
-
+
// Lock the user buffer pages in memory, and hold on to the page pointers (for the sglist)
down_read(¤t->mm->mmap_sem); /* get memory map semaphore */
rv = get_user_pages(iov_base, acd->page_count, FOLL_TOUCH | FOLL_WRITE | FOLL_GET, acd->user_pages, NULL);
@@ -88,14 +88,14 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
dev_err(&priv->ldev->pldev->dev, "Couldn't get_user_pages (%ld)\n", rv);
goto err_get_user_pages;
}
-
+
// Allocate and setup the sg_table (scatterlist entries)
rv = sg_alloc_table_from_pages(&acd->sgt, acd->user_pages, acd->page_count, iov_base & (PAGE_SIZE-1), iov_len, GFP_KERNEL);
if (rv){
dev_err(&priv->ldev->pldev->dev, "Couldn't alloc sg_table (%ld)\n", rv);
goto err_alloc_sg_table;
}
-
+
// Setup the DMA mapping for all the sg entries
acd->mapped_entry_count = dma_map_sg(&ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, ldev->dir);
if (acd->mapped_entry_count <= 0){
@@ -107,9 +107,9 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i){
desc_needed += count_parts_for_sge(sg);
}
-
+
lock_engine(ldev);
-
+
// Figoure out how many descriptors are available and return an error if there aren't enough
num_descrs_avail = count_descriptors_available(ldev);
dev_dbg(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
@@ -141,43 +141,43 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
desc->DescByteCount = sg_dma_len(sg) - (p * 0x80000);
}
desc->DescBufferByteCount = desc->DescByteCount;
-
+
desc->DescControlFlags |= DMA_DESC_CTL_IRQONERR;
if (i == 0 && p == 0)
desc->DescControlFlags |= DMA_DESC_CTL_SOP;
if (i == acd->mapped_entry_count-1 && p == pcnt-1)
desc->DescControlFlags |= DMA_DESC_CTL_EOP | DMA_DESC_CTL_IRQONDONE;
-
+
desc->DescCardAddrLS = (card_addr & 0xFFFFFFFF);
desc->DescCardAddrMS = (card_addr >> 32) & 0xF;
card_addr += desc->DescByteCount;
-
+
dma_addr = sg_dma_address(sg) + (p * 0x80000);
desc->DescSystemAddrLS = (dma_addr & 0x00000000FFFFFFFF) >> 0;
desc->DescSystemAddrMS = (dma_addr & 0xFFFFFFFF00000000) >> 32;
-
+
user_ctl = acd->priv->user_ctl;
if (i == acd->mapped_entry_count-1 && p == pcnt-1){
user_ctl = acd->priv->user_ctl_last;
}
desc->DescUserControlLS = (user_ctl & 0x00000000FFFFFFFF) >> 0;
desc->DescUserControlMS = (user_ctl & 0xFFFFFFFF00000000) >> 32;
-
+
if (i == acd->mapped_entry_count-1 && p == pcnt-1)
desc->acd = acd;
-
+
dev_dbg(&priv->ldev->pldev->dev, " Filled descriptor %p (acd = %p)\n", desc, desc->acd);
-
+
ldev->desc_next = desc->Next;
desc = desc->Next;
}
}
-
+
// Send the filled descriptors off to the hardware to process!
SetEngineSWPtr(ldev, ldev->desc_next);
-
+
unlock_engine(ldev);
-
+
// If this is a synchronous kiocb, we need to put the calling process to sleep until the transfer is complete
if (kcb == NULL || is_sync_kiocb(kcb)){
rv = wait_for_completion_interruptible(&done);
@@ -191,7 +191,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
}
return rv;
}
-
+
return -EIOCBQUEUED;
err_descr_too_many:
@@ -214,33 +214,33 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
{
unsigned int i;
-
+
BUG_ON(acd == NULL);
BUG_ON(acd->user_pages == NULL);
BUG_ON(acd->sgt.sgl == NULL);
BUG_ON(acd->ldev == NULL);
BUG_ON(acd->ldev->pldev == NULL);
-
+
dev_dbg(&acd->ldev->pldev->dev, "transfer_complete_cb(acd = [%p])\n", acd);
-
+
for (i = 0 ; i < acd->page_count ; i++){
if (!PageReserved(acd->user_pages[i])){
set_page_dirty(acd->user_pages[i]);
}
}
-
+
dma_unmap_sg(&acd->ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, acd->ldev->dir);
-
+
for (i = 0 ; i < acd->page_count ; i++){
put_page(acd->user_pages[i]);
}
-
+
sg_free_table(&acd->sgt);
-
+
kfree(acd->user_pages);
-
+
acd->flags = flags;
-
+
if (acd->kcb == NULL || is_sync_kiocb(acd->kcb)){
if (acd->cpl){
complete(acd->cpl);
@@ -264,19 +264,19 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
struct kpc_dma_device *ldev = kpc_dma_lookup_device(iminor(inode));
if (ldev == NULL)
return -ENODEV;
-
+
if (! atomic_dec_and_test(&ldev->open_count)){
atomic_inc(&ldev->open_count);
return -EBUSY; /* already open */
}
-
+
priv = kzalloc(sizeof(struct dev_private_data), GFP_KERNEL);
if (!priv)
return -ENOMEM;
-
+
priv->ldev = ldev;
filp->private_data = priv;
-
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_open(inode = [%p], filp = [%p]) priv = [%p] ldev = [%p]\n", inode, filp, priv, priv->ldev);
return 0;
}
@@ -288,11 +288,11 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
struct kpc_dma_device *eng = priv->ldev;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_close(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", inode, filp, priv, priv->ldev);
-
+
lock_engine(eng);
-
+
stop_dma_engine(eng);
-
+
cur = eng->desc_completed->Next;
while (cur != eng->desc_next){
dev_dbg(&eng->pldev->dev, "Aborting descriptor %p (acd = %p)\n", cur, cur->acd);
@@ -300,17 +300,17 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
if (cur->acd)
transfer_complete_cb(cur->acd, 0, ACD_FLAG_ABORT);
}
-
+
clear_desc(cur);
eng->desc_completed = cur;
-
+
cur = cur->Next;
}
-
+
start_dma_engine(eng);
-
+
unlock_engine(eng);
-
+
atomic_inc(&priv->ldev->open_count); /* release the device */
kfree(priv);
return 0;
@@ -330,15 +330,15 @@ ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_read(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
-
+
if (iov_count != 1){
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_read() called with iov_count > 1!\n");
return -EFAULT;
}
-
+
if (!is_sync_kiocb(kcb))
kiocb_set_cancel_fn(kcb, kpc_dma_aio_cancel);
return kpc_dma_transfer(priv, kcb, (unsigned long)iov->iov_base, iov->iov_len);
@@ -349,15 +349,15 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_write(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
-
+
if (iov_count != 1){
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_write() called with iov_count > 1!\n");
return -EFAULT;
}
-
+
if (!is_sync_kiocb(kcb))
kiocb_set_cancel_fn(kcb, kpc_dma_aio_cancel);
return kpc_dma_transfer(priv, kcb, (unsigned long)iov->iov_base, iov->iov_len);
@@ -369,10 +369,10 @@ ssize_t kpc_dma_read( struct file *filp, char __user *user_buf, size_t co
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
-
+
return kpc_dma_transfer(priv, (struct kiocb *)NULL, (unsigned long)user_buf, count);
}
@@ -381,10 +381,10 @@ ssize_t kpc_dma_write(struct file *filp, const char __user *user_buf, size_t co
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_write(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
-
+
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
-
+
return kpc_dma_transfer(priv, (struct kiocb *)NULL, (unsigned long)user_buf, count);
}
@@ -393,14 +393,14 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
-
+
switch (ioctl_num){
- case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
- case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
- case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
+ case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
+ case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
+ case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
case KND_IOCTL_GET_USER_STS: return priv->user_sts;
}
-
+
return -ENOTTY;
}
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index aeae58d9bc18..dece60e6e3f3 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -58,8 +58,8 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
if (!pldev) return 0;
ldev = platform_get_drvdata(pldev);
if (!ldev) return 0;
-
- return scnprintf(buf, PAGE_SIZE,
+
+ return scnprintf(buf, PAGE_SIZE,
"EngineControlStatus = 0x%08x\n"
"RegNextDescPtr = 0x%08x\n"
"RegSWDescPtr = 0x%08x\n"
@@ -95,25 +95,25 @@ int kpc_dma_probe(struct platform_device *pldev)
struct resource *r = NULL;
int rv = 0;
dev_t dev;
-
+
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
if (!ldev){
dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
rv = -ENOMEM;
goto err_rv;
}
-
+
dev_dbg(&pldev->dev, "kpc_dma_probe(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
-
+
INIT_LIST_HEAD(&ldev->list);
-
+
ldev->pldev = pldev;
platform_set_drvdata(pldev, ldev);
atomic_set(&ldev->open_count, 1);
-
+
mutex_init(&ldev->sem);
lock_engine(ldev);
-
+
// Get Engine regs resource
r = platform_get_resource(pldev, IORESOURCE_MEM, 0);
if (!r){
@@ -127,7 +127,7 @@ int kpc_dma_probe(struct platform_device *pldev)
rv = -ENXIO;
goto err_kfree;
}
-
+
r = platform_get_resource(pldev, IORESOURCE_IRQ, 0);
if (!r){
dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the IRQ resource!\n");
@@ -135,7 +135,7 @@ int kpc_dma_probe(struct platform_device *pldev)
goto err_kfree;
}
ldev->irq = r->start;
-
+
// Setup miscdev struct
dev = MKDEV(assigned_major_num, pldev->id);
ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
@@ -143,25 +143,25 @@ int kpc_dma_probe(struct platform_device *pldev)
dev_err(&ldev->pldev->dev, "kpc_dma_probe: device_create failed: %d\n", rv);
goto err_kfree;
}
-
+
// Setup the DMA engine
rv = setup_dma_engine(ldev, 30);
if (rv){
dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to setup_dma_engine: %d\n", rv);
goto err_misc_dereg;
}
-
+
// Setup the sysfs files
rv = sysfs_create_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
if (rv){
dev_err(&ldev->pldev->dev, "kpc_dma_probe: Failed to add sysfs files: %d\n", rv);
goto err_destroy_eng;
}
-
+
kpc_dma_add_device(ldev);
-
+
return 0;
-
+
err_destroy_eng:
destroy_dma_engine(ldev);
err_misc_dereg:
@@ -178,16 +178,16 @@ int kpc_dma_remove(struct platform_device *pldev)
struct kpc_dma_device *ldev = platform_get_drvdata(pldev);
if (!ldev)
return -ENXIO;
-
+
dev_dbg(&ldev->pldev->dev, "kpc_dma_remove(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
-
+
lock_engine(ldev);
sysfs_remove_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
destroy_dma_engine(ldev);
kpc_dma_del_device(ldev);
device_destroy(kpc_dma_class, MKDEV(assigned_major_num, ldev->pldev->id));
kfree(ldev);
-
+
return 0;
}
@@ -206,29 +206,29 @@ static
int __init kpc_dma_driver_init(void)
{
int err;
-
+
err = __register_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma", &kpc_dma_fops);
if (err < 0){
pr_err("Can't allocate a major number (%d) for kpc_dma (err = %d)\n", KPC_DMA_CHAR_MAJOR, err);
goto fail_chrdev_register;
}
assigned_major_num = err;
-
+
kpc_dma_class = class_create(THIS_MODULE, "kpc_dma");
err = PTR_ERR(kpc_dma_class);
if (IS_ERR(kpc_dma_class)){
pr_err("Can't create class kpc_dma (err = %d)\n", err);
goto fail_class_create;
}
-
+
err = platform_driver_register(&kpc_dma_plat_driver_i);
if (err){
pr_err("Can't register platform driver for kpc_dma (err = %d)\n", err);
goto fail_platdriver_register;
}
-
+
return err;
-
+
fail_platdriver_register:
class_destroy(kpc_dma_class);
fail_class_create:
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index ef913b7496e6..67c0ea31acab 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -27,23 +27,23 @@ struct kpc_dma_device {
struct device *kpc_dma_dev;
struct kobject kobj;
char name[16];
-
+
int dir; // DMA_FROM_DEVICE || DMA_TO_DEVICE
struct mutex sem;
unsigned int irq;
struct work_struct irq_work;
-
+
atomic_t open_count;
-
+
size_t accumulated_bytes;
u32 accumulated_flags;
-
+
// Descriptor "Pool" housekeeping
u32 desc_pool_cnt;
struct dma_pool *desc_pool;
struct kpc_dma_descriptor *desc_pool_first;
struct kpc_dma_descriptor *desc_pool_last;
-
+
struct kpc_dma_descriptor *desc_next;
struct kpc_dma_descriptor *desc_completed;
};
@@ -90,7 +90,7 @@ struct aio_cb_data {
unsigned char flags;
struct kiocb *kcb;
size_t len;
-
+
unsigned int page_count;
struct page **user_pages;
struct sg_table sgt;
@@ -119,10 +119,10 @@ struct kpc_dma_descriptor {
volatile u32 DescSystemAddrLS;
volatile u32 DescSystemAddrMS;
volatile u32 DescNextDescPtr;
-
+
dma_addr_t MyDMAAddr;
struct kpc_dma_descriptor *Next;
-
+
struct aio_cb_data *acd;
} __attribute__((packed));
// DescControlFlags:
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v4 2/8] Staging: kpc2000: kpc_dma: Resolve space errors around pointers and function declarations reported by checkpatch.
2019-05-13 13:43 ` [PATCH v4 " Vandana BN
@ 2019-05-13 13:43 ` Vandana BN
2019-05-13 13:43 ` [PATCH v4 3/8] Staging: kpc2000: kpc_dma: Resolve checkpatch space errors around brace '{','!' and open paranthesis '(' Vandana BN
` (5 subsequent siblings)
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 13:43 UTC (permalink / raw)
To: dan.carpenter, gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resolves below errors reported by checkpatch
ERROR: "(foo*)" should be "(foo *)"
ERROR: "foo * bar" should be "foo *bar"
ERROR: "foo __init bar" should be "foo __init bar"
ERROR: "foo __exit bar" should be "foo __exit bar"
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
v2 - split changes to multiple patches
v3 - edit commit message, subject line
v4 - edit commit message
drivers/staging/kpc2000/kpc_dma/dma.c | 8 ++++----
drivers/staging/kpc2000/kpc_dma/fileops.c | 2 +-
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c | 12 ++++++------
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h | 6 +++---
4 files changed, 14 insertions(+), 14 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index ba987307d898..488b9b81debc 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -14,7 +14,7 @@
static
irqreturn_t ndd_irq_handler(int irq, void *dev_id)
{
- struct kpc_dma_device *ldev = (struct kpc_dma_device*)dev_id;
+ struct kpc_dma_device *ldev = (struct kpc_dma_device *)dev_id;
if ((GetEngineControl(ldev) & ENG_CTL_IRQ_ACTIVE) || (ldev->desc_completed->MyDMAAddr != GetEngineCompletePtr(ldev)))
schedule_work(&ldev->irq_work);
@@ -85,8 +85,8 @@ void start_dma_engine(struct kpc_dma_device *eng)
int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
{
u32 caps;
- struct kpc_dma_descriptor * cur;
- struct kpc_dma_descriptor * next;
+ struct kpc_dma_descriptor *cur;
+ struct kpc_dma_descriptor *next;
dma_addr_t next_handle;
dma_addr_t head_handle;
unsigned int i;
@@ -208,7 +208,7 @@ void stop_dma_engine(struct kpc_dma_device *eng)
void destroy_dma_engine(struct kpc_dma_device *eng)
{
- struct kpc_dma_descriptor * cur;
+ struct kpc_dma_descriptor *cur;
dma_addr_t cur_handle;
unsigned int i;
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 6c38c3f978c3..61927b313a26 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -55,7 +55,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
ldev = priv->ldev;
BUG_ON(ldev == NULL);
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void*)iov_base, iov_len, ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void *)iov_base, iov_len, ldev);
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd){
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index dece60e6e3f3..004d91b5ad00 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -21,7 +21,7 @@ static LIST_HEAD(kpc_dma_list);
/********** kpc_dma_list list management **********/
-struct kpc_dma_device * kpc_dma_lookup_device(int minor)
+struct kpc_dma_device *kpc_dma_lookup_device(int minor)
{
struct kpc_dma_device *c;
mutex_lock(&kpc_dma_mtx);
@@ -36,14 +36,14 @@ struct kpc_dma_device * kpc_dma_lookup_device(int minor)
return c;
}
-void kpc_dma_add_device(struct kpc_dma_device * ldev)
+void kpc_dma_add_device(struct kpc_dma_device *ldev)
{
mutex_lock(&kpc_dma_mtx);
list_add(&ldev->list, &kpc_dma_list);
mutex_unlock(&kpc_dma_mtx);
}
-void kpc_dma_del_device(struct kpc_dma_device * ldev)
+void kpc_dma_del_device(struct kpc_dma_device *ldev)
{
mutex_lock(&kpc_dma_mtx);
list_del(&ldev->list);
@@ -80,7 +80,7 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
}
DEVICE_ATTR(engine_regs, 0444, show_engine_regs, NULL);
-static const struct attribute * ndd_attr_list[] = {
+static const struct attribute *ndd_attr_list[] = {
&dev_attr_engine_regs.attr,
NULL,
};
@@ -203,7 +203,7 @@ struct platform_driver kpc_dma_plat_driver_i = {
};
static
-int __init kpc_dma_driver_init(void)
+int __init kpc_dma_driver_init(void)
{
int err;
@@ -239,7 +239,7 @@ int __init kpc_dma_driver_init(void)
module_init(kpc_dma_driver_init);
static
-void __exit kpc_dma_driver_exit(void)
+void __exit kpc_dma_driver_exit(void)
{
platform_driver_unregister(&kpc_dma_plat_driver_i);
class_destroy(kpc_dma_class);
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index 67c0ea31acab..8101601736a2 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -56,7 +56,7 @@ struct dev_private_data {
u64 user_sts;
};
-struct kpc_dma_device * kpc_dma_lookup_device(int minor);
+struct kpc_dma_device *kpc_dma_lookup_device(int minor);
extern struct file_operations kpc_dma_fops;
@@ -172,12 +172,12 @@ void SetClearEngineControl(struct kpc_dma_device *eng, u32 set_bits, u32 clear_
}
static inline
-void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor * desc)
+void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
{
writel(desc->MyDMAAddr, eng->eng_regs + 2);
}
static inline
-void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor * desc)
+void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
{
writel(desc->MyDMAAddr, eng->eng_regs + 3);
}
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v4 3/8] Staging: kpc2000: kpc_dma: Resolve checkpatch space errors around brace '{','!' and open paranthesis '('.
2019-05-13 13:43 ` [PATCH v4 " Vandana BN
2019-05-13 13:43 ` [PATCH v4 2/8] Staging: kpc2000: kpc_dma: Resolve space errors around pointers and function declarations " Vandana BN
@ 2019-05-13 13:43 ` Vandana BN
2019-05-13 13:43 ` [PATCH v4 4/8] Staging: kpc2000: kpc_dma: Resolve code indent and trailing statements on next line errors reported by checkpatch Vandana BN
` (4 subsequent siblings)
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 13:43 UTC (permalink / raw)
To: dan.carpenter, gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resolves below errors reported by checkpath
ERROR: space required before the open brace '{'
ERROR: space prohibited after that '!' (ctx:BxW)
ERROR: space prohibited after that open parenthesis '('
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
v2 - split changes to multiple patches
v3 - edit commit message, subject line
v4 - edit commit message
drivers/staging/kpc2000/kpc_dma/dma.c | 28 +++++-----
drivers/staging/kpc2000/kpc_dma/fileops.c | 56 +++++++++----------
.../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 20 +++----
3 files changed, 52 insertions(+), 52 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index 488b9b81debc..2053316009bc 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -41,7 +41,7 @@ void ndd_irq_worker(struct work_struct *ws)
dev_dbg(&eng->pldev->dev, "Handling completed descriptor %p (acd = %p)\n", cur, cur->acd);
BUG_ON(cur == eng->desc_next); // Ordering failure.
- if (cur->DescControlFlags & DMA_DESC_CTL_SOP){
+ if (cur->DescControlFlags & DMA_DESC_CTL_SOP) {
eng->accumulated_bytes = 0;
eng->accumulated_flags = 0;
}
@@ -53,7 +53,7 @@ void ndd_irq_worker(struct work_struct *ws)
if (cur->DescStatusFlags & DMA_DESC_STS_SHORT)
eng->accumulated_flags |= ACD_FLAG_ENG_ACCUM_SHORT;
- if (cur->DescControlFlags & DMA_DESC_CTL_EOP){
+ if (cur->DescControlFlags & DMA_DESC_CTL_EOP) {
if (cur->acd)
transfer_complete_cb(cur->acd, eng->accumulated_bytes, eng->accumulated_flags | ACD_FLAG_DONE);
}
@@ -98,7 +98,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
if (WARN(!(caps & ENG_CAP_PRESENT), "setup_dma_engine() called for DMA Engine at %p which isn't present in hardware!\n", eng))
return -ENXIO;
- if (caps & ENG_CAP_DIRECTION){
+ if (caps & ENG_CAP_DIRECTION) {
eng->dir = DMA_FROM_DEVICE;
} else {
eng->dir = DMA_TO_DEVICE;
@@ -108,7 +108,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
eng->desc_pool = dma_pool_create("KPC DMA Descriptors", &eng->pldev->dev, sizeof(struct kpc_dma_descriptor), DMA_DESC_ALIGNMENT, 4096);
eng->desc_pool_first = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &head_handle);
- if (!eng->desc_pool_first){
+ if (!eng->desc_pool_first) {
dev_err(&eng->pldev->dev, "setup_dma_engine: couldn't allocate desc_pool_first!\n");
dma_pool_destroy(eng->desc_pool);
return -ENOMEM;
@@ -118,7 +118,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
clear_desc(eng->desc_pool_first);
cur = eng->desc_pool_first;
- for (i = 1 ; i < eng->desc_pool_cnt ; i++){
+ for (i = 1 ; i < eng->desc_pool_cnt ; i++) {
next = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &next_handle);
if (next == NULL)
goto done_alloc;
@@ -144,7 +144,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
// Grab IRQ line
rv = request_irq(eng->irq, ndd_irq_handler, IRQF_SHARED, KP_DRIVER_NAME_DMA_CONTROLLER, eng);
- if (rv){
+ if (rv) {
dev_err(&eng->pldev->dev, "setup_dma_engine: failed to request_irq: %d\n", rv);
return rv;
}
@@ -166,8 +166,8 @@ void stop_dma_engine(struct kpc_dma_device *eng)
// Wait for descriptor engine to finish current operaion
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & ENG_CTL_DMA_RUNNING){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & ENG_CTL_DMA_RUNNING) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "DMA_RUNNING still asserted!\n");
break;
}
@@ -178,8 +178,8 @@ void stop_dma_engine(struct kpc_dma_device *eng)
// Wait for reset request to be processed
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & (ENG_CTL_DMA_RUNNING | ENG_CTL_DMA_RESET_REQUEST)){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & (ENG_CTL_DMA_RUNNING | ENG_CTL_DMA_RESET_REQUEST)) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "ENG_CTL_DMA_RESET_REQUEST still asserted!\n");
break;
}
@@ -190,8 +190,8 @@ void stop_dma_engine(struct kpc_dma_device *eng)
// And wait for reset to complete
timeout = jiffies + (HZ / 2);
- while (GetEngineControl(eng) & ENG_CTL_DMA_RESET){
- if (time_after(jiffies, timeout)){
+ while (GetEngineControl(eng) & ENG_CTL_DMA_RESET) {
+ if (time_after(jiffies, timeout)) {
dev_crit(&eng->pldev->dev, "DMA_RESET still asserted!\n");
break;
}
@@ -217,7 +217,7 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
cur = eng->desc_pool_first;
cur_handle = eng->desc_pool_first->MyDMAAddr;
- for (i = 0 ; i < eng->desc_pool_cnt ; i++){
+ for (i = 0 ; i < eng->desc_pool_cnt ; i++) {
struct kpc_dma_descriptor *next = cur->Next;
dma_addr_t next_handle = cur->DescNextDescPtr;
dma_pool_free(eng->desc_pool, cur, cur_handle);
@@ -237,7 +237,7 @@ int count_descriptors_available(struct kpc_dma_device *eng)
{
u32 count = 0;
struct kpc_dma_descriptor *cur = eng->desc_next;
- while (cur != eng->desc_completed){
+ while (cur != eng->desc_completed) {
BUG_ON(cur == NULL);
count++;
cur = cur->Next;
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 61927b313a26..8dd948ef455f 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -58,7 +58,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void *)iov_base, iov_len, ldev);
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
- if (!acd){
+ if (!acd) {
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the aio data\n");
return -ENOMEM;
}
@@ -74,7 +74,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
// Allocate an array of page pointers
acd->user_pages = kzalloc(sizeof(struct page *) * acd->page_count, GFP_KERNEL);
- if (!acd->user_pages){
+ if (!acd->user_pages) {
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the page pointers\n");
rv = -ENOMEM;
goto err_alloc_userpages;
@@ -84,27 +84,27 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
down_read(¤t->mm->mmap_sem); /* get memory map semaphore */
rv = get_user_pages(iov_base, acd->page_count, FOLL_TOUCH | FOLL_WRITE | FOLL_GET, acd->user_pages, NULL);
up_read(¤t->mm->mmap_sem); /* release the semaphore */
- if (rv != acd->page_count){
+ if (rv != acd->page_count) {
dev_err(&priv->ldev->pldev->dev, "Couldn't get_user_pages (%ld)\n", rv);
goto err_get_user_pages;
}
// Allocate and setup the sg_table (scatterlist entries)
rv = sg_alloc_table_from_pages(&acd->sgt, acd->user_pages, acd->page_count, iov_base & (PAGE_SIZE-1), iov_len, GFP_KERNEL);
- if (rv){
+ if (rv) {
dev_err(&priv->ldev->pldev->dev, "Couldn't alloc sg_table (%ld)\n", rv);
goto err_alloc_sg_table;
}
// Setup the DMA mapping for all the sg entries
acd->mapped_entry_count = dma_map_sg(&ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, ldev->dir);
- if (acd->mapped_entry_count <= 0){
+ if (acd->mapped_entry_count <= 0) {
dev_err(&priv->ldev->pldev->dev, "Couldn't dma_map_sg (%d)\n", acd->mapped_entry_count);
goto err_dma_map_sg;
}
// Calculate how many descriptors are actually needed for this transfer.
- for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i){
+ for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i) {
desc_needed += count_parts_for_sge(sg);
}
@@ -113,13 +113,13 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
// Figoure out how many descriptors are available and return an error if there aren't enough
num_descrs_avail = count_descriptors_available(ldev);
dev_dbg(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
- if (desc_needed >= ldev->desc_pool_cnt){
+ if (desc_needed >= ldev->desc_pool_cnt) {
dev_warn(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d TOO MANY to ever complete!\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
rv = -EAGAIN;
unlock_engine(ldev);
goto err_descr_too_many;
}
- if (desc_needed > num_descrs_avail){
+ if (desc_needed > num_descrs_avail) {
dev_warn(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d Too many to complete right now.\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
rv = -EMSGSIZE;
unlock_engine(ldev);
@@ -129,13 +129,13 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
// Loop through all the sg table entries and fill out a descriptor for each one.
desc = ldev->desc_next;
card_addr = acd->priv->card_addr;
- for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i){
+ for_each_sg(acd->sgt.sgl, sg, acd->mapped_entry_count, i) {
pcnt = count_parts_for_sge(sg);
- for (p = 0 ; p < pcnt ; p++){
+ for (p = 0 ; p < pcnt ; p++) {
// Fill out the descriptor
BUG_ON(desc == NULL);
clear_desc(desc);
- if (p != pcnt-1){
+ if (p != pcnt-1) {
desc->DescByteCount = 0x80000;
} else {
desc->DescByteCount = sg_dma_len(sg) - (p * 0x80000);
@@ -157,7 +157,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
desc->DescSystemAddrMS = (dma_addr & 0xFFFFFFFF00000000) >> 32;
user_ctl = acd->priv->user_ctl;
- if (i == acd->mapped_entry_count-1 && p == pcnt-1){
+ if (i == acd->mapped_entry_count-1 && p == pcnt-1) {
user_ctl = acd->priv->user_ctl_last;
}
desc->DescUserControlLS = (user_ctl & 0x00000000FFFFFFFF) >> 0;
@@ -179,13 +179,13 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
unlock_engine(ldev);
// If this is a synchronous kiocb, we need to put the calling process to sleep until the transfer is complete
- if (kcb == NULL || is_sync_kiocb(kcb)){
+ if (kcb == NULL || is_sync_kiocb(kcb)) {
rv = wait_for_completion_interruptible(&done);
// If the user aborted (rv == -ERESTARTSYS), we're no longer responsible for cleaning up the acd
- if (rv == -ERESTARTSYS){
+ if (rv == -ERESTARTSYS) {
acd->cpl = NULL;
}
- if (rv == 0){
+ if (rv == 0) {
rv = acd->len;
kfree(acd);
}
@@ -200,7 +200,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
sg_free_table(&acd->sgt);
err_dma_map_sg:
err_alloc_sg_table:
- for (i = 0 ; i < acd->page_count ; i++){
+ for (i = 0 ; i < acd->page_count ; i++) {
put_page(acd->user_pages[i]);
}
err_get_user_pages:
@@ -223,15 +223,15 @@ void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
dev_dbg(&acd->ldev->pldev->dev, "transfer_complete_cb(acd = [%p])\n", acd);
- for (i = 0 ; i < acd->page_count ; i++){
- if (!PageReserved(acd->user_pages[i])){
+ for (i = 0 ; i < acd->page_count ; i++) {
+ if (!PageReserved(acd->user_pages[i])) {
set_page_dirty(acd->user_pages[i]);
}
}
dma_unmap_sg(&acd->ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, acd->ldev->dir);
- for (i = 0 ; i < acd->page_count ; i++){
+ for (i = 0 ; i < acd->page_count ; i++) {
put_page(acd->user_pages[i]);
}
@@ -241,8 +241,8 @@ void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
acd->flags = flags;
- if (acd->kcb == NULL || is_sync_kiocb(acd->kcb)){
- if (acd->cpl){
+ if (acd->kcb == NULL || is_sync_kiocb(acd->kcb)) {
+ if (acd->cpl) {
complete(acd->cpl);
} else {
// There's no completion, so we're responsible for cleaning up the acd
@@ -265,7 +265,7 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
if (ldev == NULL)
return -ENODEV;
- if (! atomic_dec_and_test(&ldev->open_count)){
+ if (!atomic_dec_and_test(&ldev->open_count)) {
atomic_inc(&ldev->open_count);
return -EBUSY; /* already open */
}
@@ -294,9 +294,9 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
stop_dma_engine(eng);
cur = eng->desc_completed->Next;
- while (cur != eng->desc_next){
+ while (cur != eng->desc_next) {
dev_dbg(&eng->pldev->dev, "Aborting descriptor %p (acd = %p)\n", cur, cur->acd);
- if (cur->DescControlFlags & DMA_DESC_CTL_EOP){
+ if (cur->DescControlFlags & DMA_DESC_CTL_EOP) {
if (cur->acd)
transfer_complete_cb(cur->acd, 0, ACD_FLAG_ABORT);
}
@@ -334,7 +334,7 @@ ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
- if (iov_count != 1){
+ if (iov_count != 1) {
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_read() called with iov_count > 1!\n");
return -EFAULT;
}
@@ -353,7 +353,7 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
- if (iov_count != 1){
+ if (iov_count != 1) {
dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_write() called with iov_count > 1!\n");
return -EFAULT;
}
@@ -365,7 +365,7 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
#endif
static
-ssize_t kpc_dma_read( struct file *filp, char __user *user_buf, size_t count, loff_t *ppos)
+ssize_t kpc_dma_read(struct file *filp, char __user *user_buf, size_t count, loff_t *ppos)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
@@ -394,7 +394,7 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
- switch (ioctl_num){
+ switch (ioctl_num) {
case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index 004d91b5ad00..0b8dcf046136 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -97,7 +97,7 @@ int kpc_dma_probe(struct platform_device *pldev)
dev_t dev;
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
- if (!ldev){
+ if (!ldev) {
dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
rv = -ENOMEM;
goto err_rv;
@@ -116,20 +116,20 @@ int kpc_dma_probe(struct platform_device *pldev)
// Get Engine regs resource
r = platform_get_resource(pldev, IORESOURCE_MEM, 0);
- if (!r){
+ if (!r) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the engine regs resource!\n");
rv = -ENXIO;
goto err_kfree;
}
ldev->eng_regs = ioremap_nocache(r->start, resource_size(r));
- if (!ldev->eng_regs){
+ if (!ldev->eng_regs) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to ioremap engine regs!\n");
rv = -ENXIO;
goto err_kfree;
}
r = platform_get_resource(pldev, IORESOURCE_IRQ, 0);
- if (!r){
+ if (!r) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the IRQ resource!\n");
rv = -ENXIO;
goto err_kfree;
@@ -139,21 +139,21 @@ int kpc_dma_probe(struct platform_device *pldev)
// Setup miscdev struct
dev = MKDEV(assigned_major_num, pldev->id);
ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
- if (IS_ERR(ldev->kpc_dma_dev)){
+ if (IS_ERR(ldev->kpc_dma_dev)) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: device_create failed: %d\n", rv);
goto err_kfree;
}
// Setup the DMA engine
rv = setup_dma_engine(ldev, 30);
- if (rv){
+ if (rv) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to setup_dma_engine: %d\n", rv);
goto err_misc_dereg;
}
// Setup the sysfs files
rv = sysfs_create_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
- if (rv){
+ if (rv) {
dev_err(&ldev->pldev->dev, "kpc_dma_probe: Failed to add sysfs files: %d\n", rv);
goto err_destroy_eng;
}
@@ -208,7 +208,7 @@ int __init kpc_dma_driver_init(void)
int err;
err = __register_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma", &kpc_dma_fops);
- if (err < 0){
+ if (err < 0) {
pr_err("Can't allocate a major number (%d) for kpc_dma (err = %d)\n", KPC_DMA_CHAR_MAJOR, err);
goto fail_chrdev_register;
}
@@ -216,13 +216,13 @@ int __init kpc_dma_driver_init(void)
kpc_dma_class = class_create(THIS_MODULE, "kpc_dma");
err = PTR_ERR(kpc_dma_class);
- if (IS_ERR(kpc_dma_class)){
+ if (IS_ERR(kpc_dma_class)) {
pr_err("Can't create class kpc_dma (err = %d)\n", err);
goto fail_class_create;
}
err = platform_driver_register(&kpc_dma_plat_driver_i);
- if (err){
+ if (err) {
pr_err("Can't register platform driver for kpc_dma (err = %d)\n", err);
goto fail_platdriver_register;
}
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v4 4/8] Staging: kpc2000: kpc_dma: Resolve code indent and trailing statements on next line errors reported by checkpatch.
2019-05-13 13:43 ` [PATCH v4 " Vandana BN
2019-05-13 13:43 ` [PATCH v4 2/8] Staging: kpc2000: kpc_dma: Resolve space errors around pointers and function declarations " Vandana BN
2019-05-13 13:43 ` [PATCH v4 3/8] Staging: kpc2000: kpc_dma: Resolve checkpatch space errors around brace '{','!' and open paranthesis '(' Vandana BN
@ 2019-05-13 13:43 ` Vandana BN
2019-05-13 13:43 ` [PATCH v4 5/8] Staging: kpc2000: kpc_dma: Resolve checkpath errors Macros in paranthesis & trailing statements on next line Vandana BN
` (3 subsequent siblings)
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 13:43 UTC (permalink / raw)
To: dan.carpenter, gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch fixes code indentaion error reported by checkpath
ERROR: switch and case should be at the same indent
ERROR: trailing statements should be on next line
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
v2 - split changes to multiple patches
v3 - edit commit message, subject line
v4 - edit commit message
drivers/staging/kpc2000/kpc_dma/fileops.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 8dd948ef455f..c09147aaa4ef 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -395,10 +395,14 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
switch (ioctl_num) {
- case KND_IOCTL_SET_CARD_ADDR: priv->card_addr = ioctl_param; return priv->card_addr;
- case KND_IOCTL_SET_USER_CTL: priv->user_ctl = ioctl_param; return priv->user_ctl;
- case KND_IOCTL_SET_USER_CTL_LAST: priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
- case KND_IOCTL_GET_USER_STS: return priv->user_sts;
+ case KND_IOCTL_SET_CARD_ADDR:
+ priv->card_addr = ioctl_param; return priv->card_addr;
+ case KND_IOCTL_SET_USER_CTL:
+ priv->user_ctl = ioctl_param; return priv->user_ctl;
+ case KND_IOCTL_SET_USER_CTL_LAST:
+ priv->user_ctl_last = ioctl_param; return priv->user_ctl_last;
+ case KND_IOCTL_GET_USER_STS:
+ return priv->user_sts;
}
return -ENOTTY;
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v4 5/8] Staging: kpc2000: kpc_dma: Resolve checkpath errors Macros in paranthesis & trailing statements on next line.
2019-05-13 13:43 ` [PATCH v4 " Vandana BN
` (2 preceding siblings ...)
2019-05-13 13:43 ` [PATCH v4 4/8] Staging: kpc2000: kpc_dma: Resolve code indent and trailing statements on next line errors reported by checkpatch Vandana BN
@ 2019-05-13 13:43 ` Vandana BN
2019-05-13 13:43 ` [PATCH v4 6/8] Staging: kpc2000: kpc_dma: Resolve warning Missing blank line after declarations & labels not to be indented Vandana BN
` (2 subsequent siblings)
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 13:43 UTC (permalink / raw)
To: dan.carpenter, gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch fixes below errors reported by checkpath
ERROR: Macros with complex values should be enclosed in parentheses
CHECK: Prefer using the BIT macro
ERROR: trailing statements should be on next line
ERROR: trailing statements should be on next line
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
v2 - split changes to multiple patches
v3 - edit commit message, subject line
v4 - edit commit message
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index 0b8dcf046136..e996ced77bd6 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -14,7 +14,7 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("Matt.Sickler@daktronics.com");
#define KPC_DMA_CHAR_MAJOR UNNAMED_MAJOR
-#define KPC_DMA_NUM_MINORS 1 << MINORBITS
+#define KPC_DMA_NUM_MINORS BIT(MINORBITS)
static DEFINE_MUTEX(kpc_dma_mtx);
static int assigned_major_num;
static LIST_HEAD(kpc_dma_list);
@@ -55,9 +55,11 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
{
struct kpc_dma_device *ldev;
struct platform_device *pldev = to_platform_device(dev);
- if (!pldev) return 0;
+ if (!pldev)
+ return 0;
ldev = platform_get_drvdata(pldev);
- if (!ldev) return 0;
+ if (!ldev)
+ return 0;
return scnprintf(buf, PAGE_SIZE,
"EngineControlStatus = 0x%08x\n"
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v4 6/8] Staging: kpc2000: kpc_dma: Resolve warning Missing blank line after declarations & labels not to be indented.
2019-05-13 13:43 ` [PATCH v4 " Vandana BN
` (3 preceding siblings ...)
2019-05-13 13:43 ` [PATCH v4 5/8] Staging: kpc2000: kpc_dma: Resolve checkpath errors Macros in paranthesis & trailing statements on next line Vandana BN
@ 2019-05-13 13:43 ` Vandana BN
2019-05-13 13:43 ` [PATCH v4 7/8] Staging: kpc2000: kpc_dma: Resolve warning to use __func__ insted of funtion name reported by checkpatch Vandana BN
2019-05-13 13:43 ` [PATCH v4 8/8] Staging: kpc2000: kpc_dma: Resolve cast warning and use const for file_operation Vandana BN
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 13:43 UTC (permalink / raw)
To: dan.carpenter, gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resloves below warnings reported by checkpath in kpc_dma
WARNING: Missing a blank line after declarations
WARNING: labels should not be indented
CHECK: Please don't use multiple blank lines
CHECK: Please use a blank line after function/struct/union/enum
declarations
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
v2 - split changes to multiple patches
v3 - edit commit message, subject line
v4 - edit commit message
drivers/staging/kpc2000/kpc_dma/dma.c | 8 +++++---
drivers/staging/kpc2000/kpc_dma/fileops.c | 11 ++++++++++-
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c | 15 ++++++++-------
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h | 8 ++++++--
4 files changed, 29 insertions(+), 13 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index 2053316009bc..ac842fa38c64 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -27,6 +27,7 @@ void ndd_irq_worker(struct work_struct *ws)
{
struct kpc_dma_descriptor *cur;
struct kpc_dma_device *eng = container_of(ws, struct kpc_dma_device, irq_work);
+
lock_engine(eng);
if (GetEngineCompletePtr(eng) == 0)
@@ -67,7 +68,6 @@ void ndd_irq_worker(struct work_struct *ws)
unlock_engine(eng);
}
-
/********** DMA Engine Init/Teardown **********/
void start_dma_engine(struct kpc_dma_device *eng)
{
@@ -91,6 +91,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
dma_addr_t head_handle;
unsigned int i;
int rv;
+
dev_dbg(&eng->pldev->dev, "Setting up DMA engine [%p]\n", eng);
caps = GetEngineCapabilities(eng);
@@ -159,6 +160,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
void stop_dma_engine(struct kpc_dma_device *eng)
{
unsigned long timeout;
+
dev_dbg(&eng->pldev->dev, "Destroying DMA engine [%p]\n", eng);
// Disable the descriptor engine
@@ -220,6 +222,7 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
for (i = 0 ; i < eng->desc_pool_cnt ; i++) {
struct kpc_dma_descriptor *next = cur->Next;
dma_addr_t next_handle = cur->DescNextDescPtr;
+
dma_pool_free(eng->desc_pool, cur, cur_handle);
cur_handle = next_handle;
cur = next;
@@ -230,13 +233,12 @@ void destroy_dma_engine(struct kpc_dma_device *eng)
free_irq(eng->irq, eng);
}
-
-
/********** Helper Functions **********/
int count_descriptors_available(struct kpc_dma_device *eng)
{
u32 count = 0;
struct kpc_dma_descriptor *cur = eng->desc_next;
+
while (cur != eng->desc_completed) {
BUG_ON(cur == NULL);
count++;
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index c09147aaa4ef..13c0e532437e 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -21,6 +21,7 @@ unsigned int count_pages(unsigned long iov_base, size_t iov_len)
{
unsigned long first = (iov_base & PAGE_MASK) >> PAGE_SHIFT;
unsigned long last = ((iov_base+iov_len-1) & PAGE_MASK) >> PAGE_SHIFT;
+
return last - first + 1;
}
@@ -28,6 +29,7 @@ static inline
unsigned int count_parts_for_sge(struct scatterlist *sg)
{
unsigned int sg_length = sg_dma_len(sg);
+
sg_length += (0x80000-1);
return (sg_length / 0x80000);
}
@@ -262,6 +264,7 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
{
struct dev_private_data *priv;
struct kpc_dma_device *ldev = kpc_dma_lookup_device(iminor(inode));
+
if (ldev == NULL)
return -ENODEV;
@@ -287,6 +290,7 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
struct kpc_dma_descriptor *cur;
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
struct kpc_dma_device *eng = priv->ldev;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_close(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", inode, filp, priv, priv->ldev);
lock_engine(eng);
@@ -321,6 +325,7 @@ static
int kpc_dma_aio_cancel(struct kiocb *kcb)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_cancel(kcb = [%p]) priv = [%p], ldev = [%p]\n", kcb, priv, priv->ldev);
return 0;
}
@@ -329,6 +334,7 @@ static
ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned long iov_count, loff_t pos)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_read(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
@@ -348,6 +354,7 @@ static
ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned long iov_count, loff_t pos)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_write(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
@@ -368,6 +375,7 @@ static
ssize_t kpc_dma_read(struct file *filp, char __user *user_buf, size_t count, loff_t *ppos)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
@@ -380,6 +388,7 @@ static
ssize_t kpc_dma_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *ppos)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_write(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
@@ -392,6 +401,7 @@ static
long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioctl_param)
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
+
dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
switch (ioctl_num) {
@@ -408,7 +418,6 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
return -ENOTTY;
}
-
struct file_operations kpc_dma_fops = {
.owner = THIS_MODULE,
.open = kpc_dma_open,
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index e996ced77bd6..135428e62f8e 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -19,11 +19,11 @@ static DEFINE_MUTEX(kpc_dma_mtx);
static int assigned_major_num;
static LIST_HEAD(kpc_dma_list);
-
/********** kpc_dma_list list management **********/
struct kpc_dma_device *kpc_dma_lookup_device(int minor)
{
struct kpc_dma_device *c;
+
mutex_lock(&kpc_dma_mtx);
list_for_each_entry(c, &kpc_dma_list, list) {
if (c->pldev->id == minor) {
@@ -31,7 +31,7 @@ struct kpc_dma_device *kpc_dma_lookup_device(int minor)
}
}
c = NULL; // not-found case
- out:
+out:
mutex_unlock(&kpc_dma_mtx);
return c;
}
@@ -55,6 +55,7 @@ static ssize_t show_engine_regs(struct device *dev, struct device_attribute *at
{
struct kpc_dma_device *ldev;
struct platform_device *pldev = to_platform_device(dev);
+
if (!pldev)
return 0;
ldev = platform_get_drvdata(pldev);
@@ -89,7 +90,6 @@ static const struct attribute *ndd_attr_list[] = {
struct class *kpc_dma_class;
-
/********** Platform Driver Functions **********/
static
int kpc_dma_probe(struct platform_device *pldev)
@@ -99,6 +99,7 @@ int kpc_dma_probe(struct platform_device *pldev)
dev_t dev;
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
+
if (!ldev) {
dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
rv = -ENOMEM;
@@ -178,6 +179,7 @@ static
int kpc_dma_remove(struct platform_device *pldev)
{
struct kpc_dma_device *ldev = platform_get_drvdata(pldev);
+
if (!ldev)
return -ENXIO;
@@ -193,7 +195,6 @@ int kpc_dma_remove(struct platform_device *pldev)
return 0;
}
-
/********** Driver Functions **********/
struct platform_driver kpc_dma_plat_driver_i = {
.probe = kpc_dma_probe,
@@ -231,11 +232,11 @@ int __init kpc_dma_driver_init(void)
return err;
- fail_platdriver_register:
+fail_platdriver_register:
class_destroy(kpc_dma_class);
- fail_class_create:
+fail_class_create:
__unregister_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma");
- fail_chrdev_register:
+fail_chrdev_register:
return err;
}
module_init(kpc_dma_driver_init);
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index 8101601736a2..cf781940ac1b 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -18,7 +18,6 @@
#include <linux/bitops.h>
#include "../kpc.h"
-
struct kp2000_device;
struct kpc_dma_device {
struct list_head list;
@@ -157,15 +156,18 @@ void WriteEngineControl(struct kpc_dma_device *eng, u32 value)
{
writel(value, eng->eng_regs + 1);
}
+
static inline
u32 GetEngineControl(struct kpc_dma_device *eng)
{
return readl(eng->eng_regs + 1);
}
+
static inline
void SetClearEngineControl(struct kpc_dma_device *eng, u32 set_bits, u32 clear_bits)
{
u32 val = GetEngineControl(eng);
+
val |= set_bits;
val &= ~clear_bits;
WriteEngineControl(eng, val);
@@ -176,16 +178,19 @@ void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *de
{
writel(desc->MyDMAAddr, eng->eng_regs + 2);
}
+
static inline
void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
{
writel(desc->MyDMAAddr, eng->eng_regs + 3);
}
+
static inline
void ClearEngineCompletePtr(struct kpc_dma_device *eng)
{
writel(0, eng->eng_regs + 4);
}
+
static inline
u32 GetEngineCompletePtr(struct kpc_dma_device *eng)
{
@@ -206,7 +211,6 @@ void unlock_engine(struct kpc_dma_device *eng)
mutex_unlock(&eng->sem);
}
-
/// Shared Functions
void start_dma_engine(struct kpc_dma_device *eng);
int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt);
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v4 7/8] Staging: kpc2000: kpc_dma: Resolve warning to use __func__ insted of funtion name reported by checkpatch.
2019-05-13 13:43 ` [PATCH v4 " Vandana BN
` (4 preceding siblings ...)
2019-05-13 13:43 ` [PATCH v4 6/8] Staging: kpc2000: kpc_dma: Resolve warning Missing blank line after declarations & labels not to be indented Vandana BN
@ 2019-05-13 13:43 ` Vandana BN
2019-05-13 13:43 ` [PATCH v4 8/8] Staging: kpc2000: kpc_dma: Resolve cast warning and use const for file_operation Vandana BN
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 13:43 UTC (permalink / raw)
To: dan.carpenter, gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This patch resolves warnings to use __func__ insted of funtion name.
WARNING: Prefer using '"%s...", __func__' to using 'setup_dma_engine', this function's name, in a string
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
v2 - split changes to multiple patches
v3 - edit commit message, subject line
v4 - edit commit message
drivers/staging/kpc2000/kpc_dma/dma.c | 6 ++---
drivers/staging/kpc2000/kpc_dma/fileops.c | 26 +++++++++----------
.../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 18 ++++++-------
3 files changed, 25 insertions(+), 25 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
index ac842fa38c64..13687ab3e9c7 100644
--- a/drivers/staging/kpc2000/kpc_dma/dma.c
+++ b/drivers/staging/kpc2000/kpc_dma/dma.c
@@ -96,7 +96,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
caps = GetEngineCapabilities(eng);
- if (WARN(!(caps & ENG_CAP_PRESENT), "setup_dma_engine() called for DMA Engine at %p which isn't present in hardware!\n", eng))
+ if (WARN(!(caps & ENG_CAP_PRESENT), "%s() called for DMA Engine at %p which isn't present in hardware!\n", __func__, eng))
return -ENXIO;
if (caps & ENG_CAP_DIRECTION) {
@@ -110,7 +110,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
eng->desc_pool_first = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &head_handle);
if (!eng->desc_pool_first) {
- dev_err(&eng->pldev->dev, "setup_dma_engine: couldn't allocate desc_pool_first!\n");
+ dev_err(&eng->pldev->dev, "%s: couldn't allocate desc_pool_first!\n", __func__);
dma_pool_destroy(eng->desc_pool);
return -ENOMEM;
}
@@ -146,7 +146,7 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
// Grab IRQ line
rv = request_irq(eng->irq, ndd_irq_handler, IRQF_SHARED, KP_DRIVER_NAME_DMA_CONTROLLER, eng);
if (rv) {
- dev_err(&eng->pldev->dev, "setup_dma_engine: failed to request_irq: %d\n", rv);
+ dev_err(&eng->pldev->dev, "%s: failed to request_irq: %d\n", __func__, rv);
return rv;
}
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index 13c0e532437e..c21672ea2b4f 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -57,7 +57,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
ldev = priv->ldev;
BUG_ON(ldev == NULL);
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void *)iov_base, iov_len, ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", __func__, priv, kcb, (void *)iov_base, iov_len, ldev);
acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd) {
@@ -209,7 +209,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
kfree(acd->user_pages);
err_alloc_userpages:
kfree(acd);
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer returning with error %ld\n", rv);
+ dev_dbg(&priv->ldev->pldev->dev, "%s returning with error %ld\n", __func__, rv);
return rv;
}
@@ -223,7 +223,7 @@ void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags)
BUG_ON(acd->ldev == NULL);
BUG_ON(acd->ldev->pldev == NULL);
- dev_dbg(&acd->ldev->pldev->dev, "transfer_complete_cb(acd = [%p])\n", acd);
+ dev_dbg(&acd->ldev->pldev->dev, "%s(acd = [%p])\n", __func__, acd);
for (i = 0 ; i < acd->page_count ; i++) {
if (!PageReserved(acd->user_pages[i])) {
@@ -280,7 +280,7 @@ int kpc_dma_open(struct inode *inode, struct file *filp)
priv->ldev = ldev;
filp->private_data = priv;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_open(inode = [%p], filp = [%p]) priv = [%p] ldev = [%p]\n", inode, filp, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(inode = [%p], filp = [%p]) priv = [%p] ldev = [%p]\n", __func__, inode, filp, priv, priv->ldev);
return 0;
}
@@ -291,7 +291,7 @@ int kpc_dma_close(struct inode *inode, struct file *filp)
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
struct kpc_dma_device *eng = priv->ldev;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_close(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", inode, filp, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(inode = [%p], filp = [%p]) priv = [%p], ldev = [%p]\n", __func__, inode, filp, priv, priv->ldev);
lock_engine(eng);
@@ -326,7 +326,7 @@ int kpc_dma_aio_cancel(struct kiocb *kcb)
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_cancel(kcb = [%p]) priv = [%p], ldev = [%p]\n", kcb, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p]) priv = [%p], ldev = [%p]\n", __func__, kcb, priv, priv->ldev);
return 0;
}
@@ -335,13 +335,13 @@ ssize_t kpc_dma_aio_read(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_read(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", __func__, kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
if (iov_count != 1) {
- dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_read() called with iov_count > 1!\n");
+ dev_err(&priv->ldev->pldev->dev, "%s() called with iov_count > 1!\n", __func__);
return -EFAULT;
}
@@ -355,13 +355,13 @@ ssize_t kpc_dma_aio_write(struct kiocb *kcb, const struct iovec *iov, unsigned
{
struct dev_private_data *priv = (struct dev_private_data *)kcb->ki_filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_aio_write(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", kcb, iov, iov_count, pos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(kcb = [%p], iov = [%p], iov_count = %ld, pos = %lld) priv = [%p], ldev = [%p]\n", __func__, kcb, iov, iov_count, pos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
if (iov_count != 1) {
- dev_err(&priv->ldev->pldev->dev, "kpc_dma_aio_write() called with iov_count > 1!\n");
+ dev_err(&priv->ldev->pldev->dev, "%s() called with iov_count > 1!\n", __func__);
return -EFAULT;
}
@@ -376,7 +376,7 @@ ssize_t kpc_dma_read(struct file *filp, char __user *user_buf, size_t cou
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_read(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", __func__, filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_FROM_DEVICE)
return -EMEDIUMTYPE;
@@ -389,7 +389,7 @@ ssize_t kpc_dma_write(struct file *filp, const char __user *user_buf, size_t co
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_write(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", filp, user_buf, count, ppos, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], user_buf = [%p], count = %zu, ppos = [%p]) priv = [%p], ldev = [%p]\n", __func__, filp, user_buf, count, ppos, priv, priv->ldev);
if (priv->ldev->dir != DMA_TO_DEVICE)
return -EMEDIUMTYPE;
@@ -402,7 +402,7 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
{
struct dev_private_data *priv = (struct dev_private_data *)filp->private_data;
- dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_ioctl(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", filp, ioctl_num, ioctl_param, priv, priv->ldev);
+ dev_dbg(&priv->ldev->pldev->dev, "%s(filp = [%p], ioctl_num = 0x%x, ioctl_param = 0x%lx) priv = [%p], ldev = [%p]\n", __func__, filp, ioctl_num, ioctl_param, priv, priv->ldev);
switch (ioctl_num) {
case KND_IOCTL_SET_CARD_ADDR:
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
index 135428e62f8e..cda057569163 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
@@ -101,12 +101,12 @@ int kpc_dma_probe(struct platform_device *pldev)
struct kpc_dma_device *ldev = kzalloc(sizeof(struct kpc_dma_device), GFP_KERNEL);
if (!ldev) {
- dev_err(&pldev->dev, "kpc_dma_probe: unable to kzalloc space for kpc_dma_device\n");
+ dev_err(&pldev->dev, "%s: unable to kzalloc space for kpc_dma_device\n", __func__);
rv = -ENOMEM;
goto err_rv;
}
- dev_dbg(&pldev->dev, "kpc_dma_probe(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
+ dev_dbg(&pldev->dev, "%s(pldev = [%p]) ldev = [%p]\n", __func__, pldev, ldev);
INIT_LIST_HEAD(&ldev->list);
@@ -120,20 +120,20 @@ int kpc_dma_probe(struct platform_device *pldev)
// Get Engine regs resource
r = platform_get_resource(pldev, IORESOURCE_MEM, 0);
if (!r) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the engine regs resource!\n");
+ dev_err(&ldev->pldev->dev, "%s: didn't get the engine regs resource!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
ldev->eng_regs = ioremap_nocache(r->start, resource_size(r));
if (!ldev->eng_regs) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to ioremap engine regs!\n");
+ dev_err(&ldev->pldev->dev, "%s: failed to ioremap engine regs!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
r = platform_get_resource(pldev, IORESOURCE_IRQ, 0);
if (!r) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: didn't get the IRQ resource!\n");
+ dev_err(&ldev->pldev->dev, "%s: didn't get the IRQ resource!\n", __func__);
rv = -ENXIO;
goto err_kfree;
}
@@ -143,21 +143,21 @@ int kpc_dma_probe(struct platform_device *pldev)
dev = MKDEV(assigned_major_num, pldev->id);
ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
if (IS_ERR(ldev->kpc_dma_dev)) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: device_create failed: %d\n", rv);
+ dev_err(&ldev->pldev->dev, "%s: device_create failed: %d\n", __func__, rv);
goto err_kfree;
}
// Setup the DMA engine
rv = setup_dma_engine(ldev, 30);
if (rv) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: failed to setup_dma_engine: %d\n", rv);
+ dev_err(&ldev->pldev->dev, "%s: failed to setup_dma_engine: %d\n", __func__, rv);
goto err_misc_dereg;
}
// Setup the sysfs files
rv = sysfs_create_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
if (rv) {
- dev_err(&ldev->pldev->dev, "kpc_dma_probe: Failed to add sysfs files: %d\n", rv);
+ dev_err(&ldev->pldev->dev, "%s: Failed to add sysfs files: %d\n", __func__, rv);
goto err_destroy_eng;
}
@@ -183,7 +183,7 @@ int kpc_dma_remove(struct platform_device *pldev)
if (!ldev)
return -ENXIO;
- dev_dbg(&ldev->pldev->dev, "kpc_dma_remove(pldev = [%p]) ldev = [%p]\n", pldev, ldev);
+ dev_dbg(&ldev->pldev->dev, "%s(pldev = [%p]) ldev = [%p]\n", __func__, pldev, ldev);
lock_engine(ldev);
sysfs_remove_files(&(ldev->pldev->dev.kobj), ndd_attr_list);
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
* [PATCH v4 8/8] Staging: kpc2000: kpc_dma: Resolve cast warning and use const for file_operation
2019-05-13 13:43 ` [PATCH v4 " Vandana BN
` (5 preceding siblings ...)
2019-05-13 13:43 ` [PATCH v4 7/8] Staging: kpc2000: kpc_dma: Resolve warning to use __func__ insted of funtion name reported by checkpatch Vandana BN
@ 2019-05-13 13:43 ` Vandana BN
6 siblings, 0 replies; 32+ messages in thread
From: Vandana BN @ 2019-05-13 13:43 UTC (permalink / raw)
To: dan.carpenter, gregkh, devel, linux-kernel, lukas.bulwahn
Cc: skhan, linux-kernel-mentees, Vandana BN
This Patch resolves unnecessary cast warning and const file_operations
reported by checkpath.pl
WARNING: unnecessary cast may hide bugs
WARNING: struct file_operations should normally be const
Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
v2 - split changes to multiple patches
v3 - edit commit message, subject line
v4 - edit commit message
drivers/staging/kpc2000/kpc_dma/fileops.c | 4 ++--
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index c21672ea2b4f..54a1419728ce 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -59,7 +59,7 @@ int kpc_dma_transfer(struct dev_private_data *priv, struct kiocb *kcb, unsigned
dev_dbg(&priv->ldev->pldev->dev, "%s(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", __func__, priv, kcb, (void *)iov_base, iov_len, ldev);
- acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
+ acd = kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd) {
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the aio data\n");
return -ENOMEM;
@@ -418,7 +418,7 @@ long kpc_dma_ioctl(struct file *filp, unsigned int ioctl_num, unsigned long ioc
return -ENOTTY;
}
-struct file_operations kpc_dma_fops = {
+const struct file_operations kpc_dma_fops = {
.owner = THIS_MODULE,
.open = kpc_dma_open,
.release = kpc_dma_close,
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
index cf781940ac1b..ee47f43e71cf 100644
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
@@ -57,7 +57,7 @@ struct dev_private_data {
struct kpc_dma_device *kpc_dma_lookup_device(int minor);
-extern struct file_operations kpc_dma_fops;
+extern const struct file_operations kpc_dma_fops;
#define ENG_CAP_PRESENT 0x00000001
#define ENG_CAP_DIRECTION 0x00000002
--
2.17.1
^ permalink raw reply related [flat|nested] 32+ messages in thread
end of thread, other threads:[~2019-05-13 13:44 UTC | newest]
Thread overview: 32+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-05-10 19:38 [PATCH] Staging: kpc2000: kpc_dma: resolve checkpath errors and warnings Vandana BN
2019-05-10 20:34 ` [Linux-kernel-mentees] " Lukas Bulwahn
2019-05-12 15:48 ` Vandana BN
2019-05-11 6:04 ` Greg KH
2019-05-12 23:39 ` [PATCH v2 1/8] Staging: kpc2000: kpc_dma: resolve trailing whitespace error reported by checkpatch Vandana BN
2019-05-12 23:39 ` [PATCH v2 2/8] Staging: kpc2000: kpc_dma: Resolve coding style errors " Vandana BN
2019-05-13 8:42 ` Greg KH
2019-05-13 10:43 ` Vandana BN
2019-05-12 23:39 ` [PATCH v2 3/8] " Vandana BN
2019-05-12 23:39 ` [PATCH v2 4/8] Staging: kpc2000: kpc_dma: Resolve code indent error " Vandana BN
2019-05-12 23:39 ` [PATCH v2 5/8] Staging: kpc2000: kpc_dma: Resolve coding style " Vandana BN
2019-05-12 23:39 ` [PATCH v2 6/8] Staging: kpc2000: kpc_dma: Resolve coding style warning " Vandana BN
2019-05-12 23:39 ` [PATCH v2 7/8] " Vandana BN
2019-05-12 23:40 ` [PATCH v2 8/8] " Vandana BN
2019-05-13 10:26 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error " Vandana BN
2019-05-13 10:26 ` [PATCH v3 2/8] Staging: kpc2000: kpc_dma: Resolve space errors around pointers and function declarations " Vandana BN
2019-05-13 10:26 ` [PATCH v3 3/8] Staging: kpc2000: kpc_dma: Resolve checkpatch space errors around brace '{','!' and open paranthesis '(' Vandana BN
2019-05-13 10:26 ` [PATCH v3 4/8] Staging: kpc2000: kpc_dma: Resolve code indent and trailing statements on next line errors reported by checkpatch Vandana BN
2019-05-13 10:26 ` [PATCH v3 5/8] Staging: kpc2000: kpc_dma: Resolve checkpath errors Macros in paranthesis & trailing statements on next line Vandana BN
2019-05-13 10:26 ` [PATCH v3 6/8] Staging: kpc2000: kpc_dma: Resolve warning Missing blank line after declarations & labels not to be indented Vandana BN
2019-05-13 10:26 ` [PATCH v3 7/8] Staging: kpc2000: kpc_dma: Resolve warning to use __func__ insted of funtion name reported by checkpatch Vandana BN
2019-05-13 10:26 ` [PATCH v3 8/8] Staging: kpc2000: kpc_dma: Resolve cast warning and use const for file_operation Vandana BN
2019-05-13 10:49 ` [PATCH v3 1/8] Staging: kpc2000: kpc_dma: Resolve trailing whitespace error reported by checkpatch Dan Carpenter
2019-05-13 12:00 ` Vandana BN
2019-05-13 13:43 ` [PATCH v4 " Vandana BN
2019-05-13 13:43 ` [PATCH v4 2/8] Staging: kpc2000: kpc_dma: Resolve space errors around pointers and function declarations " Vandana BN
2019-05-13 13:43 ` [PATCH v4 3/8] Staging: kpc2000: kpc_dma: Resolve checkpatch space errors around brace '{','!' and open paranthesis '(' Vandana BN
2019-05-13 13:43 ` [PATCH v4 4/8] Staging: kpc2000: kpc_dma: Resolve code indent and trailing statements on next line errors reported by checkpatch Vandana BN
2019-05-13 13:43 ` [PATCH v4 5/8] Staging: kpc2000: kpc_dma: Resolve checkpath errors Macros in paranthesis & trailing statements on next line Vandana BN
2019-05-13 13:43 ` [PATCH v4 6/8] Staging: kpc2000: kpc_dma: Resolve warning Missing blank line after declarations & labels not to be indented Vandana BN
2019-05-13 13:43 ` [PATCH v4 7/8] Staging: kpc2000: kpc_dma: Resolve warning to use __func__ insted of funtion name reported by checkpatch Vandana BN
2019-05-13 13:43 ` [PATCH v4 8/8] Staging: kpc2000: kpc_dma: Resolve cast warning and use const for file_operation Vandana BN
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).