tree c04511e2e8078c4ef540d59406f3d16d46a390e8
parent 6b8029fab64164b5895d58d23229b75c82e3a6fc
author Lars-Peter Clausen <lars@metafoo.de> 1349396040 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1349460303 +0900

drivers/rtc/rtc-jz4740.c: fix IRQ error check

The irq field of the jz4740_irc struct is unsigned.  Yet we assign the
result of platform_get_irq() to it.  platform_get_irq() may return a
negative error code and the code checks for this condition by checking if
'irq' is less than zero.  But since 'irq' is unsigned this test will
always be false.  Fix it by making 'irq' signed.

The issue was found using the following coccinelle semantic patch:

//<smpl>
@@
type T;
unsigned T i;
@@
(
*i < 0
|
*i >= 0
)
//</smpl>

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>