* [PATCH] usb: gadget: function: printer: Add gadget dev interface status judgment
@ 2020-06-15 9:46 qiang.zhang
2020-06-24 8:59 ` 回复: " Zhang, Qiang
2020-06-28 1:14 ` Zhang, Qiang
0 siblings, 2 replies; 5+ messages in thread
From: qiang.zhang @ 2020-06-15 9:46 UTC (permalink / raw)
To: balbi; +Cc: gregkh, linux-usb, linux-kernel
From: Zqiang <qiang.zhang@windriver.com>
After the interface of gadget printer device was disabled,
We should not continue operate the device.
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
---
drivers/usb/gadget/function/f_printer.c | 36 +++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/usb/gadget/function/f_printer.c b/drivers/usb/gadget/function/f_printer.c
index 9c7ed2539ff7..2b45a61e4213 100644
--- a/drivers/usb/gadget/function/f_printer.c
+++ b/drivers/usb/gadget/function/f_printer.c
@@ -338,6 +338,11 @@ printer_open(struct inode *inode, struct file *fd)
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENODEV;
+ }
+
if (!dev->printer_cdev_open) {
dev->printer_cdev_open = 1;
fd->private_data = dev;
@@ -430,6 +435,12 @@ printer_read(struct file *fd, char __user *buf, size_t len, loff_t *ptr)
mutex_lock(&dev->lock_printer_io);
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ mutex_unlock(&dev->lock_printer_io);
+ return -ENODEV;
+ }
+
/* We will use this flag later to check if a printer reset happened
* after we turn interrupts back on.
*/
@@ -561,6 +572,12 @@ printer_write(struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
mutex_lock(&dev->lock_printer_io);
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ mutex_unlock(&dev->lock_printer_io);
+ return -ENODEV;
+ }
+
/* Check if a printer reset happens while we have interrupts on */
dev->reset_printer = 0;
@@ -667,6 +684,13 @@ printer_fsync(struct file *fd, loff_t start, loff_t end, int datasync)
inode_lock(inode);
spin_lock_irqsave(&dev->lock, flags);
+
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ inode_unlock(inode);
+ return -ENODEV;
+ }
+
tx_list_empty = (likely(list_empty(&dev->tx_reqs)));
spin_unlock_irqrestore(&dev->lock, flags);
@@ -689,6 +713,13 @@ printer_poll(struct file *fd, poll_table *wait)
mutex_lock(&dev->lock_printer_io);
spin_lock_irqsave(&dev->lock, flags);
+
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ mutex_unlock(&dev->lock_printer_io);
+ return EPOLLERR | EPOLLHUP;
+ }
+
setup_rx_reqs(dev);
spin_unlock_irqrestore(&dev->lock, flags);
mutex_unlock(&dev->lock_printer_io);
@@ -722,6 +753,11 @@ printer_ioctl(struct file *fd, unsigned int code, unsigned long arg)
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENODEV;
+ }
+
switch (code) {
case GADGET_GET_PRINTER_STATUS:
status = (int)dev->printer_status;
--
2.24.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* 回复: [PATCH] usb: gadget: function: printer: Add gadget dev interface status judgment
2020-06-15 9:46 [PATCH] usb: gadget: function: printer: Add gadget dev interface status judgment qiang.zhang
@ 2020-06-24 8:59 ` Zhang, Qiang
2020-06-24 9:29 ` Greg KH
2020-06-28 1:14 ` Zhang, Qiang
1 sibling, 1 reply; 5+ messages in thread
From: Zhang, Qiang @ 2020-06-24 8:59 UTC (permalink / raw)
To: Greg KH; +Cc: linux-usb, linux-kernel, Felipe Balbi
Hello, Greg KH
Please have you review the patch?
thanks
Zqiang
________________________________________
发件人: linux-usb-owner@vger.kernel.org <linux-usb-owner@vger.kernel.org> 代表 qiang.zhang@windriver.com <qiang.zhang@windriver.com>
发送时间: 2020年6月15日 17:46
收件人: balbi@kernel.org
抄送: gregkh@linuxfoundation.org; linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org
主题: [PATCH] usb: gadget: function: printer: Add gadget dev interface status judgment
From: Zqiang <qiang.zhang@windriver.com>
After the interface of gadget printer device was disabled,
We should not continue operate the device.
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
---
drivers/usb/gadget/function/f_printer.c | 36 +++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/usb/gadget/function/f_printer.c b/drivers/usb/gadget/function/f_printer.c
index 9c7ed2539ff7..2b45a61e4213 100644
--- a/drivers/usb/gadget/function/f_printer.c
+++ b/drivers/usb/gadget/function/f_printer.c
@@ -338,6 +338,11 @@ printer_open(struct inode *inode, struct file *fd)
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENODEV;
+ }
+
if (!dev->printer_cdev_open) {
dev->printer_cdev_open = 1;
fd->private_data = dev;
@@ -430,6 +435,12 @@ printer_read(struct file *fd, char __user *buf, size_t len, loff_t *ptr)
mutex_lock(&dev->lock_printer_io);
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ mutex_unlock(&dev->lock_printer_io);
+ return -ENODEV;
+ }
+
/* We will use this flag later to check if a printer reset happened
* after we turn interrupts back on.
*/
@@ -561,6 +572,12 @@ printer_write(struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
mutex_lock(&dev->lock_printer_io);
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ mutex_unlock(&dev->lock_printer_io);
+ return -ENODEV;
+ }
+
/* Check if a printer reset happens while we have interrupts on */
dev->reset_printer = 0;
@@ -667,6 +684,13 @@ printer_fsync(struct file *fd, loff_t start, loff_t end, int datasync)
inode_lock(inode);
spin_lock_irqsave(&dev->lock, flags);
+
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ inode_unlock(inode);
+ return -ENODEV;
+ }
+
tx_list_empty = (likely(list_empty(&dev->tx_reqs)));
spin_unlock_irqrestore(&dev->lock, flags);
@@ -689,6 +713,13 @@ printer_poll(struct file *fd, poll_table *wait)
mutex_lock(&dev->lock_printer_io);
spin_lock_irqsave(&dev->lock, flags);
+
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ mutex_unlock(&dev->lock_printer_io);
+ return EPOLLERR | EPOLLHUP;
+ }
+
setup_rx_reqs(dev);
spin_unlock_irqrestore(&dev->lock, flags);
mutex_unlock(&dev->lock_printer_io);
@@ -722,6 +753,11 @@ printer_ioctl(struct file *fd, unsigned int code, unsigned long arg)
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENODEV;
+ }
+
switch (code) {
case GADGET_GET_PRINTER_STATUS:
status = (int)dev->printer_status;
--
2.24.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: 回复: [PATCH] usb: gadget: function: printer: Add gadget dev interface status judgment
2020-06-24 8:59 ` 回复: " Zhang, Qiang
@ 2020-06-24 9:29 ` Greg KH
2020-07-25 6:15 ` Felipe Balbi
0 siblings, 1 reply; 5+ messages in thread
From: Greg KH @ 2020-06-24 9:29 UTC (permalink / raw)
To: Zhang, Qiang; +Cc: linux-usb, linux-kernel, Felipe Balbi
On Wed, Jun 24, 2020 at 08:59:40AM +0000, Zhang, Qiang wrote:
> Hello, Greg KH
> Please have you review the patch?
I am not the gadget driver maintainer :)
Give Felipe a chance to catch up...
greg k-h
^ permalink raw reply [flat|nested] 5+ messages in thread
* 回复: [PATCH] usb: gadget: function: printer: Add gadget dev interface status judgment
2020-06-15 9:46 [PATCH] usb: gadget: function: printer: Add gadget dev interface status judgment qiang.zhang
2020-06-24 8:59 ` 回复: " Zhang, Qiang
@ 2020-06-28 1:14 ` Zhang, Qiang
1 sibling, 0 replies; 5+ messages in thread
From: Zhang, Qiang @ 2020-06-28 1:14 UTC (permalink / raw)
To: balbi, felipe.balbi; +Cc: gregkh, linux-usb, linux-kernel
________________________________________
发件人: linux-usb-owner@vger.kernel.org <linux-usb-owner@vger.kernel.org> 代表 qiang.zhang@windriver.com <qiang.zhang@windriver.com>
发送时间: 2020年6月15日 17:46
收件人: balbi@kernel.org
抄送: gregkh@linuxfoundation.org; linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org
主题: [PATCH] usb: gadget: function: printer: Add gadget dev interface status judgment
From: Zqiang <qiang.zhang@windriver.com>
After the interface of gadget printer device was disabled,
We should not continue operate the device.
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
---
drivers/usb/gadget/function/f_printer.c | 36 +++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/usb/gadget/function/f_printer.c b/drivers/usb/gadget/function/f_printer.c
index 9c7ed2539ff7..2b45a61e4213 100644
--- a/drivers/usb/gadget/function/f_printer.c
+++ b/drivers/usb/gadget/function/f_printer.c
@@ -338,6 +338,11 @@ printer_open(struct inode *inode, struct file *fd)
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENODEV;
+ }
+
if (!dev->printer_cdev_open) {
dev->printer_cdev_open = 1;
fd->private_data = dev;
@@ -430,6 +435,12 @@ printer_read(struct file *fd, char __user *buf, size_t len, loff_t *ptr)
mutex_lock(&dev->lock_printer_io);
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ mutex_unlock(&dev->lock_printer_io);
+ return -ENODEV;
+ }
+
/* We will use this flag later to check if a printer reset happened
* after we turn interrupts back on.
*/
@@ -561,6 +572,12 @@ printer_write(struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
mutex_lock(&dev->lock_printer_io);
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ mutex_unlock(&dev->lock_printer_io);
+ return -ENODEV;
+ }
+
/* Check if a printer reset happens while we have interrupts on */
dev->reset_printer = 0;
@@ -667,6 +684,13 @@ printer_fsync(struct file *fd, loff_t start, loff_t end, int datasync)
inode_lock(inode);
spin_lock_irqsave(&dev->lock, flags);
+
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ inode_unlock(inode);
+ return -ENODEV;
+ }
+
tx_list_empty = (likely(list_empty(&dev->tx_reqs)));
spin_unlock_irqrestore(&dev->lock, flags);
@@ -689,6 +713,13 @@ printer_poll(struct file *fd, poll_table *wait)
mutex_lock(&dev->lock_printer_io);
spin_lock_irqsave(&dev->lock, flags);
+
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ mutex_unlock(&dev->lock_printer_io);
+ return EPOLLERR | EPOLLHUP;
+ }
+
setup_rx_reqs(dev);
spin_unlock_irqrestore(&dev->lock, flags);
mutex_unlock(&dev->lock_printer_io);
@@ -722,6 +753,11 @@ printer_ioctl(struct file *fd, unsigned int code, unsigned long arg)
spin_lock_irqsave(&dev->lock, flags);
+ if (dev->interface < 0) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENODEV;
+ }
+
switch (code) {
case GADGET_GET_PRINTER_STATUS:
status = (int)dev->printer_status;
--
2.24.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: 回复: [PATCH] usb: gadget: function: printer: Add gadget dev interface status judgment
2020-06-24 9:29 ` Greg KH
@ 2020-07-25 6:15 ` Felipe Balbi
0 siblings, 0 replies; 5+ messages in thread
From: Felipe Balbi @ 2020-07-25 6:15 UTC (permalink / raw)
To: Greg KH, Zhang, Qiang; +Cc: linux-usb, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 335 bytes --]
Greg KH <gregkh@linuxfoundation.org> writes:
> On Wed, Jun 24, 2020 at 08:59:40AM +0000, Zhang, Qiang wrote:
>> Hello, Greg KH
>> Please have you review the patch?
>
> I am not the gadget driver maintainer :)
>
> Give Felipe a chance to catch up...
It has been in my testing/next for a while, actually :-)
--
balbi
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 832 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2020-07-25 6:15 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2020-06-15 9:46 [PATCH] usb: gadget: function: printer: Add gadget dev interface status judgment qiang.zhang
2020-06-24 8:59 ` 回复: " Zhang, Qiang
2020-06-24 9:29 ` Greg KH
2020-07-25 6:15 ` Felipe Balbi
2020-06-28 1:14 ` Zhang, Qiang
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