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path: root/drivers/dma/imx-dma.c
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Diffstat (limited to 'drivers/dma/imx-dma.c')
-rw-r--r--drivers/dma/imx-dma.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index a46e1d9fa3e..a1eac99a5fa 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -243,6 +243,21 @@ static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
243 else 243 else
244 dmamode = DMA_MODE_WRITE; 244 dmamode = DMA_MODE_WRITE;
245 245
246 switch (imxdmac->word_size) {
247 case DMA_SLAVE_BUSWIDTH_4_BYTES:
248 if (sgl->length & 3 || sgl->dma_address & 3)
249 return NULL;
250 break;
251 case DMA_SLAVE_BUSWIDTH_2_BYTES:
252 if (sgl->length & 1 || sgl->dma_address & 1)
253 return NULL;
254 break;
255 case DMA_SLAVE_BUSWIDTH_1_BYTE:
256 break;
257 default:
258 return NULL;
259 }
260
246 ret = imx_dma_setup_sg(imxdmac->imxdma_channel, sgl, sg_len, 261 ret = imx_dma_setup_sg(imxdmac->imxdma_channel, sgl, sg_len,
247 dma_length, imxdmac->per_address, dmamode); 262 dma_length, imxdmac->per_address, dmamode);
248 if (ret) 263 if (ret)