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arm: dma_alloc_coherent: malloc() -> memalign()

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Even though the MMU/D-cache is off, some DMA engines still
expect strict address alignment.

For example, the incoming Faraday FTMAC110 & FTGMAC100 ethernet
controllers expect the tx/rx descriptors should always be aligned
to 16-bytes boundary.

Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com>
CC: Albert ARIBAUD <albert.u.boot@aribaud.net>
This commit is contained in:
Kuo-Jung Su 2013-07-29 13:51:43 +08:00 • committed by Albert ARIBAUD
parent fb8d49cb44
commit 771f74c3d3
1 changed files with 1 additions and 1 deletions
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2
arch/arm/include/asm/dma-mapping.h
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@ -16,7 +16,7 @@ enum dma_data_direction {
static void *dma_alloc_coherent(size_t len, unsigned long *handle) static void *dma_alloc_coherent(size_t len, unsigned long *handle)
{ {
*handle = (unsigned long)malloc(len); *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len);
return (void *)*handle; return (void *)*handle;
} }