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>

parent 97709069

arch/arc/mm/dma.c

+2 −2

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