From: Nathan Chancellor Date: Thu, 23 Apr 2020 16:29:24 +0000 (-0700) Subject: USB: gadget: udc: s3c2410_udc: Remove pointless NULL check in s3c2410_udc_nuke X-Git-Tag: v4.9.229~136 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fd554743e85b7d98c7a0684cd0f2a41cbfc26b22;p=platform%2Fkernel%2Flinux-amlogic.git USB: gadget: udc: s3c2410_udc: Remove pointless NULL check in s3c2410_udc_nuke [ Upstream commit 7a0fbcf7c308920bc6116b3a5fb21c8cc5fec128 ] Clang warns: drivers/usb/gadget/udc/s3c2410_udc.c:255:11: warning: comparison of address of 'ep->queue' equal to a null pointer is always false [-Wtautological-pointer-compare] if (&ep->queue == NULL) ~~~~^~~~~ ~~~~ 1 warning generated. It is not wrong, queue is not a pointer so if ep is not NULL, the address of queue cannot be NULL. No other driver does a check like this and this check has been around since the driver was first introduced, presumably with no issues so it does not seem like this check should be something else. Just remove it. Commit afe956c577b2d ("kbuild: Enable -Wtautological-compare") exposed this but it is not the root cause of the warning. Fixes: 3fc154b6b8134 ("USB Gadget driver for Samsung s3c2410 ARM SoC") Link: https://github.com/ClangBuiltLinux/linux/issues/1004 Reviewed-by: Nick Desaulniers Reported-by: kbuild test robot Signed-off-by: Nathan Chancellor Signed-off-by: Felipe Balbi Signed-off-by: Sasha Levin --- diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c index eb3571e..08153a4 100644 --- a/drivers/usb/gadget/udc/s3c2410_udc.c +++ b/drivers/usb/gadget/udc/s3c2410_udc.c @@ -269,10 +269,6 @@ static void s3c2410_udc_done(struct s3c2410_ep *ep, static void s3c2410_udc_nuke(struct s3c2410_udc *udc, struct s3c2410_ep *ep, int status) { - /* Sanity check */ - if (&ep->queue == NULL) - return; - while (!list_empty(&ep->queue)) { struct s3c2410_request *req; req = list_entry(ep->queue.next, struct s3c2410_request,