MIPS: lantiq: Use dma_zalloc_coherent() in dma code

Instead of using dma_alloc_coherent() and memset() directly use
dma_zalloc_coherent().

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/19962/
Cc: ralf@linux-mips.org
Cc: jhogan@kernel.org
Cc: john@phrozen.org
Cc: linux-mips@linux-mips.org
Cc: dev@kresin.me

diff --git a/arch/mips/lantiq/xway/dma.c b/arch/mips/lantiq/xway/dma.c
index 805b3a6ab2d60c95c8c8a13477cfd21f9bc616e4..4b9fbb6744adecfe17fdba69649e8f95f875dfcb 100644 (file)
--- a/arch/mips/lantiq/xway/dma.c
+++ b/arch/mips/lantiq/xway/dma.c
@@ -130,10 +130,9 @@ ltq_dma_alloc(struct ltq_dma_channel *ch)
        unsigned long flags;
 
        ch->desc = 0;
-       ch->desc_base = dma_alloc_coherent(NULL,
+       ch->desc_base = dma_zalloc_coherent(NULL,
                                LTQ_DESC_NUM * LTQ_DESC_SIZE,
                                &ch->phys, GFP_ATOMIC);
-       memset(ch->desc_base, 0, LTQ_DESC_NUM * LTQ_DESC_SIZE);
 
        spin_lock_irqsave(&ltq_dma_lock, flags);
        ltq_dma_w32(ch->nr, LTQ_DMA_CS);