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authorAnton Vorontsov <avorontsov@mvista.com>2010-05-14 18:33:18 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2010-05-20 13:21:46 -0700
commit7f1cccd3ec8789e52897bc34420ca81a5e2edeab (patch)
tree8f97a2d5879b9c7e130372552a2b42b239e97d59 /drivers/usb/host
parent12e7eca9630c0e00284e8a3995fc5eceaa0c199e (diff)
downloadblackbird-op-linux-7f1cccd3ec8789e52897bc34420ca81a5e2edeab.tar.gz
blackbird-op-linux-7f1cccd3ec8789e52897bc34420ca81a5e2edeab.zip
USB: FHCI: cq_get() should check kfifo_out()'s return value
Since commit 7acd72eb85f1c7a15e8b5eb554994949241737f1 ("kfifo: rename kfifo_put... into kfifo_in... and kfifo_get... into kfifo_out..."), kfifo_out() is marked __must_check, and that causes gcc to produce lots of warnings like this: CC drivers/usb/host/fhci-mem.o In file included from drivers/usb/host/fhci-hcd.c:34: drivers/usb/host/fhci.h: In function 'cq_get': drivers/usb/host/fhci.h:520: warning: ignoring return value of 'kfifo_out', declared with attribute warn_unused_result ... This patch fixes the issue by properly checking the return value. Signed-off-by: Anton Vorontsov <avorontsov@mvista.com> Cc: stable <stable@kernel.org> [.33 and .34] Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host')
-rw-r--r--drivers/usb/host/fhci.h9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/usb/host/fhci.h b/drivers/usb/host/fhci.h
index 649ab07308f2..71c3caaea4c1 100644
--- a/drivers/usb/host/fhci.h
+++ b/drivers/usb/host/fhci.h
@@ -20,6 +20,7 @@
#include <linux/kernel.h>
#include <linux/types.h>
+#include <linux/bug.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/kfifo.h>
@@ -515,9 +516,13 @@ static inline int cq_put(struct kfifo *kfifo, void *p)
static inline void *cq_get(struct kfifo *kfifo)
{
- void *p = NULL;
+ unsigned int sz;
+ void *p;
+
+ sz = kfifo_out(kfifo, (void *)&p, sizeof(p));
+ if (sz != sizeof(p))
+ return NULL;
- kfifo_out(kfifo, (void *)&p, sizeof(p));
return p;
}
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