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ARM: Fix DMA coherent allocator alignment

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An out by one bug meant that the DMA coherent allocator was aligning
to one more bit than it should, causing it to run out of available
memory quicker.  Fix this.

Reported-by: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2010-11-03 16:00:15 +00:00
parent 151f52f09c
commit c947f69fff
1 changed files with 1 additions and 1 deletions
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arch/arm/mm/dma-mapping.c
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@ -198,7 +198,7 @@ __dma_alloc_remap(struct page *page, size_t size, gfp_t gfp, pgprot_t prot)
* fragmentation of the DMA space, and also prevents allocations
* smaller than a section from crossing a section boundary.
*/
bit = fls(size - 1) + 1;
bit = fls(size - 1);
if (bit > SECTION_SHIFT)
bit = SECTION_SHIFT;
align = 1 << bit;