]> git.baikalelectronics.ru Git - kernel.git/commit
ARM: 8816/1: dma-mapping: fix potential uninitialized return
authorNathan Jones <nathanj439@gmail.com>
Tue, 4 Dec 2018 09:05:32 +0000 (10:05 +0100)
committerRussell King <rmk+kernel@armlinux.org.uk>
Tue, 4 Dec 2018 22:38:34 +0000 (22:38 +0000)
commit5f63d467fd1ae17c425717c02c825273376a0a52
treed3bbfe10057d1c9c0717a65ff53f815991ad67d5
parentbfe9f78f09138e4538f4cbbeb73d595f3cffa314
ARM: 8816/1: dma-mapping: fix potential uninitialized return

While trying to use the dma_mmap_*() interface, it was noticed that this
interface returns strange values when passed an incorrect length.

If neither of the if() statements fire then the return value is
uninitialized. In the worst case it returns 0 which means the caller
will think the function succeeded.

Fixes: 49736c70e33b ("ARM: dma-mapping: Remove traces of NOMMU code")
Signed-off-by: Nathan Jones <nathanj439@gmail.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
arch/arm/mm/dma-mapping.c