[PATCH 0/3] staging: emxx_udc: Fixed all meaningful sparse warnings

[PATCH 0/3] staging: emxx_udc: Fixed all meaningful sparse warnings

[Carmeli Tamir]

This series fixes all meaningful sparse (running make C=2... ) warnings. 
The number of warnings is reduced from ~280 to 12 (only warnings of type 'expression using sizeof(void)' are left). Resent the series to Greg's request.

Carmeli Tamir (3):
  staging: emxx_udc: Added static modifier to udc_controller
  staging: emxx_udc: Added missing __iomem modifier to handle p_regs
  staging: emxx_udc: Added missing le16_to_cpu conversions

 drivers/staging/emxx_udc/emxx_udc.c | 68 +++++++++++++++++++------------------
 drivers/staging/emxx_udc/emxx_udc.h |  2 +-
 2 files changed, 36 insertions(+), 34 deletions(-)

-- 
2.7.4

[PATCH 1/3] staging: emxx_udc: Added static modifier to udc_controller

[Carmeli Tamir]

Added static modifier to the udc_controller, since it's only
required within emxx_udc.c.

Signed-off-by: Carmeli Tamir <carmeli.tamir@gmail.com>
---
 drivers/staging/emxx_udc/emxx_udc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/emxx_udc/emxx_udc.c b/drivers/staging/emxx_udc/emxx_udc.c
index 65cc3d9..f49c863 100644
--- a/drivers/staging/emxx_udc/emxx_udc.c
+++ b/drivers/staging/emxx_udc/emxx_udc.c
@@ -56,7 +56,7 @@ static void _nbu2ss_fifo_flush(struct nbu2ss_udc *, struct nbu2ss_ep *);
 
 /*===========================================================================*/
 /* Global */
-struct nbu2ss_udc udc_controller;
+static struct nbu2ss_udc udc_controller;
 
 /*-------------------------------------------------------------------------*/
 /* Read */
-- 
2.7.4

Re: [PATCH 1/3] staging: emxx_udc: Added static modifier to udc_controller

[Geert Uytterhoeven]

Hi Carmeli,

CC Magnus

(staging drivers receive so may janitorial changes that the original author is
 lost in the git shortlog noise)

On Wed, Nov 7, 2018 at 9:46 PM Carmeli Tamir <carmeli.tamir@gmail.com> wrote:
> Added static modifier to the udc_controller, since it's only
> required within emxx_udc.c.
>
> Signed-off-by: Carmeli Tamir <carmeli.tamir@gmail.com>

Thanks for your patch!

> --- a/drivers/staging/emxx_udc/emxx_udc.c
> +++ b/drivers/staging/emxx_udc/emxx_udc.c
> @@ -56,7 +56,7 @@ static void _nbu2ss_fifo_flush(struct nbu2ss_udc *, struct nbu2ss_ep *);
>
>  /*===========================================================================*/
>  /* Global */
> -struct nbu2ss_udc udc_controller;
> +static struct nbu2ss_udc udc_controller;

What about the "Global" comment?
Perhaps this was intentional?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

[PATCH 2/3] staging: emxx_udc: Added missing __iomem modifier to handle p_regs

[Carmeli Tamir]

Since in nbu2ss_drv_probe() p_regs is assigned from mmio_base, which is
marked as __iomem, p_regs also should be market with __iomem.

Signed-off-by: Carmeli Tamir <carmeli.tamir@gmail.com>
---
 drivers/staging/emxx_udc/emxx_udc.c | 44 ++++++++++++++++++-------------------
 drivers/staging/emxx_udc/emxx_udc.h |  2 +-
 2 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/emxx_udc/emxx_udc.c b/drivers/staging/emxx_udc/emxx_udc.c
index f49c863..3504277 100644
--- a/drivers/staging/emxx_udc/emxx_udc.c
+++ b/drivers/staging/emxx_udc/emxx_udc.c
@@ -60,21 +60,21 @@ static struct nbu2ss_udc udc_controller;
 
 /*-------------------------------------------------------------------------*/
 /* Read */
-static inline u32 _nbu2ss_readl(void *address)
+static inline u32 _nbu2ss_readl(void __iomem *address)
 {
 	return __raw_readl(address);
 }
 
 /*-------------------------------------------------------------------------*/
 /* Write */
-static inline void _nbu2ss_writel(void *address, u32 udata)
+static inline void _nbu2ss_writel(void __iomem *address, u32 udata)
 {
 	__raw_writel(udata, address);
 }
 
 /*-------------------------------------------------------------------------*/
 /* Set Bit */
-static inline void _nbu2ss_bitset(void *address, u32 udata)
+static inline void _nbu2ss_bitset(void __iomem *address, u32 udata)
 {
 	u32	reg_dt = __raw_readl(address) | (udata);
 
@@ -83,7 +83,7 @@ static inline void _nbu2ss_bitset(void *address, u32 udata)
 
 /*-------------------------------------------------------------------------*/
 /* Clear Bit */
-static inline void _nbu2ss_bitclr(void *address, u32 udata)
+static inline void _nbu2ss_bitclr(void __iomem *address, u32 udata)
 {
 	u32	reg_dt = __raw_readl(address) & ~(udata);
 
@@ -184,7 +184,7 @@ static u32 _nbu2ss_get_begin_ram_address(struct nbu2ss_udc *udc)
 	u32		num, buf_type;
 	u32		data, last_ram_adr, use_ram_size;
 
-	struct ep_regs *p_ep_regs;
+	struct ep_regs __iomem *p_ep_regs;
 
 	last_ram_adr = (D_RAM_SIZE_CTRL / sizeof(u32)) * 2;
 	use_ram_size = 0;
@@ -377,7 +377,7 @@ static void _nbu2ss_ep_dma_exit(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
 {
 	u32		num;
 	u32		data;
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	if (udc->vbus_active == 0)
 		return;		/* VBUS OFF */
@@ -408,7 +408,7 @@ static void _nbu2ss_ep_dma_exit(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
 /* Abort DMA */
 static void _nbu2ss_ep_dma_abort(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
 {
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	_nbu2ss_bitclr(&preg->EP_DCR[ep->epnum - 1].EP_DCR1, DCR1_EPN_REQEN);
 	mdelay(DMA_DISABLE_TIME);	/* DCR1_EPN_REQEN Clear */
@@ -426,7 +426,7 @@ static void _nbu2ss_ep_in_end(
 {
 	u32		data;
 	u32		num;
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	if (length >= sizeof(u32))
 		return;
@@ -817,7 +817,7 @@ static int _nbu2ss_out_dma(
 	u32		burst = 1;
 	u32		data;
 	int		result = -EINVAL;
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	if (req->dma_flag)
 		return 1;		/* DMA is forwarded */
@@ -880,7 +880,7 @@ static int _nbu2ss_epn_out_pio(
 	union usb_reg_access	temp_32;
 	union usb_reg_access	*p_buf_32;
 	int		result = 0;
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	if (req->dma_flag)
 		return 1;		/* DMA is forwarded */
@@ -964,7 +964,7 @@ static int _nbu2ss_epn_out_transfer(
 	u32		num;
 	u32		i_recv_length;
 	int		result = 1;
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	if (ep->epnum == 0)
 		return -EINVAL;
@@ -1026,7 +1026,7 @@ static int _nbu2ss_in_dma(
 	u32		i_write_length;
 	u32		data;
 	int		result = -EINVAL;
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	if (req->dma_flag)
 		return 1;		/* DMA is forwarded */
@@ -1101,7 +1101,7 @@ static int _nbu2ss_epn_in_pio(
 	union usb_reg_access	temp_32;
 	union usb_reg_access	*p_buf_32 = NULL;
 	int		result = 0;
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	if (req->dma_flag)
 		return 1;		/* DMA is forwarded */
@@ -1317,7 +1317,7 @@ static void _nbu2ss_set_endpoint_stall(
 	u8		num, epnum;
 	u32		data;
 	struct nbu2ss_ep *ep;
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	if ((ep_adrs == 0) || (ep_adrs == 0x80)) {
 		if (bstall) {
@@ -1421,7 +1421,7 @@ static int _nbu2ss_get_ep_stall(struct nbu2ss_udc *udc, u8 ep_adrs)
 {
 	u8		epnum;
 	u32		data = 0, bit_data;
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	epnum = ep_adrs & ~USB_ENDPOINT_DIR_MASK;
 	if (epnum == 0) {
@@ -1516,7 +1516,7 @@ static void _nbu2ss_epn_set_stall(
 	u32	regdata;
 	int	limit_cnt = 0;
 
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	if (ep->direct == USB_DIR_IN) {
 		for (limit_cnt = 0
@@ -1924,7 +1924,7 @@ static inline void _nbu2ss_epn_in_int(
 	int	result = 0;
 	u32	status;
 
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	if (req->dma_flag)
 		return;		/* DMA is forwarded */
@@ -2019,7 +2019,7 @@ static inline void _nbu2ss_epn_out_dma_int(
 	u32		num;
 	u32		dmacnt, ep_dmacnt;
 	u32		mpkt;
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	num = ep->epnum - 1;
 
@@ -2195,7 +2195,7 @@ static int _nbu2ss_pullup(struct nbu2ss_udc *udc, int is_on)
 /*-------------------------------------------------------------------------*/
 static void _nbu2ss_fifo_flush(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
 {
-	struct fc_regs	*p = udc->p_regs;
+	struct fc_regs __iomem *p = udc->p_regs;
 
 	if (udc->vbus_active == 0)
 		return;
@@ -2413,7 +2413,7 @@ static irqreturn_t _nbu2ss_udc_irq(int irq, void *_udc)
 	u32	epnum, int_bit;
 
 	struct nbu2ss_udc	*udc = (struct nbu2ss_udc *)_udc;
-	struct fc_regs	*preg = udc->p_regs;
+	struct fc_regs __iomem *preg = udc->p_regs;
 
 	if (gpio_get_value(VBUS_VALUE) == 0) {
 		_nbu2ss_writel(&preg->USB_INT_STA, ~USB_INT_STA_RW);
@@ -2804,7 +2804,7 @@ static int nbu2ss_ep_fifo_status(struct usb_ep *_ep)
 	struct nbu2ss_ep	*ep;
 	struct nbu2ss_udc	*udc;
 	unsigned long		flags;
-	struct fc_regs		*preg;
+	struct fc_regs	__iomem *preg;
 
 	if (!_ep) {
 		pr_err("%s, bad param\n", __func__);
@@ -3177,7 +3177,7 @@ static int nbu2ss_drv_probe(struct platform_device *pdev)
 				  0, driver_name, udc);
 
 	/* IO Memory */
-	udc->p_regs = (struct fc_regs *)mmio_base;
+	udc->p_regs = (struct fc_regs __iomem *)mmio_base;
 
 	/* USB Function Controller Interrupt */
 	if (status != 0) {
diff --git a/drivers/staging/emxx_udc/emxx_udc.h b/drivers/staging/emxx_udc/emxx_udc.h
index 8337e38c..e28a74d 100644
--- a/drivers/staging/emxx_udc/emxx_udc.h
+++ b/drivers/staging/emxx_udc/emxx_udc.h
@@ -582,7 +582,7 @@ struct nbu2ss_udc {
 
 	u32		curr_config;	/* Current Configuration Number */
 
-	struct fc_regs		*p_regs;
+	struct fc_regs __iomem *p_regs;
 };
 
 /* USB register access structure */
-- 
2.7.4

[PATCH 3/3] staging: emxx_udc: Added missing le16_to_cpu conversions

[Carmeli Tamir]

Fixed sparse tool warnings due to missing convesion from
le16 to cpu endienness. 

Signed-off-by: Carmeli Tamir <carmeli.tamir@gmail.com>
---
 drivers/staging/emxx_udc/emxx_udc.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/emxx_udc/emxx_udc.c b/drivers/staging/emxx_udc/emxx_udc.c
index 3504277..bf7c5da 100644
--- a/drivers/staging/emxx_udc/emxx_udc.c
+++ b/drivers/staging/emxx_udc/emxx_udc.c
@@ -135,6 +135,7 @@ static void _nbu2ss_ep0_complete(struct usb_ep *_ep, struct usb_request *_req)
 {
 	u8		recipient;
 	u16		selector;
+	u16		wIndex;
 	u32		test_mode;
 	struct usb_ctrlrequest	*p_ctrl;
 	struct nbu2ss_udc *udc;
@@ -149,10 +150,11 @@ static void _nbu2ss_ep0_complete(struct usb_ep *_ep, struct usb_request *_req)
 			/*-------------------------------------------------*/
 			/* SET_FEATURE */
 			recipient = (u8)(p_ctrl->bRequestType & USB_RECIP_MASK);
-			selector  = p_ctrl->wValue;
+			selector  = le16_to_cpu(p_ctrl->wValue);
 			if ((recipient == USB_RECIP_DEVICE) &&
 			    (selector == USB_DEVICE_TEST_MODE)) {
-				test_mode = (u32)(p_ctrl->wIndex >> 8);
+				wIndex = le16_to_cpu(p_ctrl->wIndex);
+				test_mode = (u32)(wIndex >> 8);
 				_nbu2ss_set_test_mode(udc, test_mode);
 			}
 		}
@@ -1449,8 +1451,8 @@ static inline int _nbu2ss_req_feature(struct nbu2ss_udc *udc, bool bset)
 {
 	u8	recipient = (u8)(udc->ctrl.bRequestType & USB_RECIP_MASK);
 	u8	direction = (u8)(udc->ctrl.bRequestType & USB_DIR_IN);
-	u16	selector  = udc->ctrl.wValue;
-	u16	wIndex    = udc->ctrl.wIndex;
+	u16	selector  = le16_to_cpu(udc->ctrl.wValue);
+	u16	wIndex    = le16_to_cpu(udc->ctrl.wIndex);
 	u8	ep_adrs;
 	int	result = -EOPNOTSUPP;
 
@@ -1549,8 +1551,8 @@ static int std_req_get_status(struct nbu2ss_udc *udc)
 	if ((udc->ctrl.wValue != 0x0000) || (direction != USB_DIR_IN))
 		return result;
 
-	length = min_t(u16, udc->ctrl.wLength, sizeof(status_data));
-
+	length =
+		min_t(u16, le16_to_cpu(udc->ctrl.wLength), sizeof(status_data));
 	switch (recipient) {
 	case USB_RECIP_DEVICE:
 		if (udc->ctrl.wIndex == 0x0000) {
@@ -1565,8 +1567,8 @@ static int std_req_get_status(struct nbu2ss_udc *udc)
 		break;
 
 	case USB_RECIP_ENDPOINT:
-		if (0x0000 == (udc->ctrl.wIndex & 0xFF70)) {
-			ep_adrs = (u8)(udc->ctrl.wIndex & 0xFF);
+		if (0x0000 == (le16_to_cpu(udc->ctrl.wIndex) & 0xFF70)) {
+			ep_adrs = (u8)(le16_to_cpu(udc->ctrl.wIndex) & 0xFF);
 			result = _nbu2ss_get_ep_stall(udc, ep_adrs);
 
 			if (result > 0)
@@ -1606,7 +1608,7 @@ static int std_req_set_feature(struct nbu2ss_udc *udc)
 static int std_req_set_address(struct nbu2ss_udc *udc)
 {
 	int		result = 0;
-	u32		wValue = udc->ctrl.wValue;
+	u32		wValue = le16_to_cpu(udc->ctrl.wValue);
 
 	if ((udc->ctrl.bRequestType != 0x00)	||
 	    (udc->ctrl.wIndex != 0x0000)	||
@@ -1628,7 +1630,7 @@ static int std_req_set_address(struct nbu2ss_udc *udc)
 /*-------------------------------------------------------------------------*/
 static int std_req_set_configuration(struct nbu2ss_udc *udc)
 {
-	u32 config_value = (u32)(udc->ctrl.wValue & 0x00ff);
+	u32 config_value = (u32)(le16_to_cpu(udc->ctrl.wValue) & 0x00ff);
 
 	if ((udc->ctrl.wIndex != 0x0000)	||
 	    (udc->ctrl.wLength != 0x0000)	||
-- 
2.7.4

[PATCH 1/3] staging: emxx_udc: Added static modifier to udc_controller

[Carmeli Tamir]

Added static modifier to the udc_controller, since it's only
required within emxx_udc.c.
Previously posted without any feedback, now updated according to master.

Signed-off-by: Carmeli Tamir <carmeli.tamir@gmail.com>
---
 drivers/staging/emxx_udc/emxx_udc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/emxx_udc/emxx_udc.c b/drivers/staging/emxx_udc/emxx_udc.c
index 3e51476..94a4327 100644
--- a/drivers/staging/emxx_udc/emxx_udc.c
+++ b/drivers/staging/emxx_udc/emxx_udc.c
@@ -56,7 +56,7 @@ static void _nbu2ss_fifo_flush(struct nbu2ss_udc *, struct nbu2ss_ep *);
 
 /*===========================================================================*/
 /* Global */
-struct nbu2ss_udc udc_controller;
+static struct nbu2ss_udc udc_controller;
 
 /*-------------------------------------------------------------------------*/
 /* Read */
-- 
2.7.4

Re: [PATCH 1/3] staging: emxx_udc: Added static modifier to udc_controller

[Greg KH]

On Thu, Nov 01, 2018 at 03:58:57PM -0400, Carmeli Tamir wrote:
> Added static modifier to the udc_controller, since it's only
> required within emxx_udc.c.
> Previously posted without any feedback, now updated according to master.
> 
> Signed-off-by: Carmeli Tamir <carmeli.tamir@gmail.com>
> ---
>  drivers/staging/emxx_udc/emxx_udc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

I do not see patch 3/3 in this series.

Can you resend the whole series, properly threaded, so that I know what
to apply?  I think you send this one already and I have no idea what to
do here, sorry.

greg k-h

[PATCH 1/3] staging: emxx_udc: Added static modifier to udc_controller

[Carmeli Tamir]

Added static modifier to the udc_controller, since it's only
required within emxx_udc.c.

Signed-off-by: Carmeli Tamir <carmeli.tamir@gmail.com>
---
 drivers/staging/emxx_udc/emxx_udc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/emxx_udc/emxx_udc.c b/drivers/staging/emxx_udc/emxx_udc.c
index 3e51476..94a4327 100644
--- a/drivers/staging/emxx_udc/emxx_udc.c
+++ b/drivers/staging/emxx_udc/emxx_udc.c
@@ -56,7 +56,7 @@ static void _nbu2ss_fifo_flush(struct nbu2ss_udc *, struct nbu2ss_ep *);
 
 /*===========================================================================*/
 /* Global */
-struct nbu2ss_udc udc_controller;
+static struct nbu2ss_udc udc_controller;
 
 /*-------------------------------------------------------------------------*/
 /* Read */
-- 
2.7.4