tree 2ba0b5f126402495b5a0925ce0283c23329420d0
parent 8e0c34b0d268f10d84cb3f79f59c140d545a553a
author Marek Szyprowski <m.szyprowski@samsung.com> 1436358115 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1437142120 +0100

ARM: 8404/1: dma-mapping: fix off-by-one error in bitmap size check

nr_bitmaps member of mapping structure stores the number of already
allocated bitmaps and it is interpreted as loop iterator (it starts from
0 not from 1), so a comparison against number of possible bitmap
extensions should include this fact. This patch fixes this by changing
the extension failure condition. This issue has been introduced by
commit 4d852ef8c2544ce21ae41414099a7504c61164a0 ("arm: dma-mapping: Add
support to extend DMA IOMMU mappings").

Reported-by: Hyungwon Hwang <human.hwang@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Hyungwon Hwang <human.hwang@samsung.com>
Cc: stable@vger.kernel.org  # v3.15+
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>