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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-09-22 11:32:25 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-09-26 10:36:50 +0200 |
| commit | d8e89b47e00ee80e920761145144640aac4cf71a (patch) | |
| tree | f3d0bd7bf530fe56dc6fba2f7701f0e6b82795d3 /arch/arm/mm/dma-mapping.c | |
| parent | ARM: fix vmlinux.lds.S discarding sections (diff) | |
| download | linux-d8e89b47e00ee80e920761145144640aac4cf71a.tar.xz linux-d8e89b47e00ee80e920761145144640aac4cf71a.zip | |
ARM: dma-mapping: free allocated page if unable to map
If the attempt to map a page for DMA fails (eg, because we're out of
mapping space) then we must not hold on to the page we allocated for
DMA - doing so will result in a memory leak.
Cc: <stable@kernel.org>
Reported-by: Bryan Phillippe <bp@darkforest.org>
Tested-by: Bryan Phillippe <bp@darkforest.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/dma-mapping.c')
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 0a0a1e7c20d2..c3ff82f92d9c 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -324,6 +324,8 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, if (addr) *handle = pfn_to_dma(dev, page_to_pfn(page)); + else + __dma_free_buffer(page, size); return addr; } |