usb: xhci: Remove useless variable
diff mbox series

Message ID 20210515084647.179580-1-chengzhihao1@huawei.com
State New, archived
Headers show
Series
  • usb: xhci: Remove useless variable
Related show

Commit Message

Zhihao Cheng May 15, 2021, 8:46 a.m. UTC
Fix the following gcc warning:

drivers/usb/host/xhci.c:1349:15: warning: variable ‘len’ set but not
used [-Wunused-but-set-variable ]

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
---
 drivers/usb/host/xhci.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

Comments

Greg Kroah-Hartman May 15, 2021, 8:51 a.m. UTC | #1
On Sat, May 15, 2021 at 04:46:47PM +0800, Zhihao Cheng wrote:
> Fix the following gcc warning:
> 
> drivers/usb/host/xhci.c:1349:15: warning: variable ‘len’ set but not
> used [-Wunused-but-set-variable ]
> 
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
> ---
>  drivers/usb/host/xhci.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
> index ca9385d22f68..b38a14ef2e15 100644
> --- a/drivers/usb/host/xhci.c
> +++ b/drivers/usb/host/xhci.c
> @@ -1346,7 +1346,6 @@ static bool xhci_urb_temp_buffer_required(struct usb_hcd *hcd,
>  
>  static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
>  {
> -	unsigned int len;
>  	unsigned int buf_len;
>  	enum dma_data_direction dir;
>  
> @@ -1362,10 +1361,10 @@ static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
>  				 dir);
>  
>  	if (usb_urb_dir_in(urb))
> -		len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
> -					   urb->transfer_buffer,
> -					   buf_len,
> -					   0);
> +		sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
> +				     urb->transfer_buffer,
> +				     buf_len,
> +				     0);
>  
>  	urb->transfer_flags &= ~URB_DMA_MAP_SINGLE;
>  	kfree(urb->transfer_buffer);
> -- 
> 2.25.4
> 

Isn't this the same thing that I have asked "please fix this by checking
the return value!" in the past?

Please do so.

greg k-h

Patch
diff mbox series

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index ca9385d22f68..b38a14ef2e15 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1346,7 +1346,6 @@  static bool xhci_urb_temp_buffer_required(struct usb_hcd *hcd,
 
 static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
 {
-	unsigned int len;
 	unsigned int buf_len;
 	enum dma_data_direction dir;
 
@@ -1362,10 +1361,10 @@  static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
 				 dir);
 
 	if (usb_urb_dir_in(urb))
-		len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
-					   urb->transfer_buffer,
-					   buf_len,
-					   0);
+		sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
+				     urb->transfer_buffer,
+				     buf_len,
+				     0);
 
 	urb->transfer_flags &= ~URB_DMA_MAP_SINGLE;
 	kfree(urb->transfer_buffer);