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ARC: Don't memzero twice in dma_alloc_coherent for __GFP_ZERO 

alloc_pages_exact() get gfp flags and handle zero'ing already

And while it, fix the case where ioremap fails: return rightaway.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2015-07-03 10:40:43 +05:30
parent 9770906921
commit f718c2efff
1 changed files with 2 additions and 2 deletions
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4
arch/arc/mm/dma.c
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@ -60,8 +60,8 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
/* This is kernel Virtual address (0x7000_0000 based) */
kvaddr = ioremap_nocache((unsigned long)paddr, size);
if (kvaddr != NULL)
memset(kvaddr, 0, size);
if (kvaddr == NULL)
return NULL;
/* This is bus address, platform dependent */
*dma_handle = (dma_addr_t)paddr;