path: root/arch/arm
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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-09-22 10:32:25 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-09-26 09:36:50 +0100
commitd8e89b47e00ee80e920761145144640aac4cf71a (patch)
treef3d0bd7bf530fe56dc6fba2f7701f0e6b82795d3 /arch/arm
parent6760b109603c794e4bd281c0014fef069c019b6a (diff)
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')
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;