ARM: Fix DMA coherent allocator alignment



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>

parent 151f52f0

arch/arm/mm/dma-mapping.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;