diff mbox

uvc: simplify redundant check

Message ID 1390472905-29586-1-git-send-email-oliver@neukum.org (mailing list archive)
State New, archived
Headers show

Commit Message

Oliver Neukum Jan. 23, 2014, 10:28 a.m. UTC
From: Oliver Neukum <oneukum@suse.de>

x < constant implies x + unsigned < constant
That check just obfuscates the code

Signed-off-by: Oliver Neukum <oneukum@suse.de>
---
 drivers/media/usb/uvc/uvc_driver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Laurent Pinchart Jan. 23, 2014, 11:32 a.m. UTC | #1
Hi Oliver,

Thank you for the patch.

On Thursday 23 January 2014 11:28:24 oliver@neukum.org wrote:
> From: Oliver Neukum <oneukum@suse.de>
> 
> x < constant implies x + unsigned < constant
> That check just obfuscates the code
> 
> Signed-off-by: Oliver Neukum <oneukum@suse.de>

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

I've applied the patch to my tree and will send a pull request for v3.15.

> ---
>  drivers/media/usb/uvc/uvc_driver.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/usb/uvc/uvc_driver.c
> b/drivers/media/usb/uvc/uvc_driver.c index c3bb250..b6cac17 100644
> --- a/drivers/media/usb/uvc/uvc_driver.c
> +++ b/drivers/media/usb/uvc/uvc_driver.c
> @@ -925,7 +925,7 @@ static int uvc_parse_standard_control(struct uvc_device
> *dev, case UVC_VC_HEADER:
>  		n = buflen >= 12 ? buffer[11] : 0;
> 
> -		if (buflen < 12 || buflen < 12 + n) {
> +		if (buflen < 12 + n) {
>  			uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
>  				"interface %d HEADER error\n", udev->devnum,
>  				alts->desc.bInterfaceNumber);
diff mbox

Patch

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index c3bb250..b6cac17 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -925,7 +925,7 @@  static int uvc_parse_standard_control(struct uvc_device *dev,
 	case UVC_VC_HEADER:
 		n = buflen >= 12 ? buffer[11] : 0;
 
-		if (buflen < 12 || buflen < 12 + n) {
+		if (buflen < 12 + n) {
 			uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
 				"interface %d HEADER error\n", udev->devnum,
 				alts->desc.bInterfaceNumber);