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dmaengine: vdma: Fix compilation warning in cyclic dma mode

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This patch fixes the below compilation warining.
drivers/dma/xilinx/xilinx_vdma.c: In function 'xilinx_dma_prep_dma_cyclic':
drivers/dma/xilinx/xilinx_vdma.c:1808:23: warning: 'segment' may be used
uninitialized in this function [-Wmaybe-uninitialized]
   segment->hw.control |= XILINX_DMA_BD_SOP;

The start of packet (SOP) should be set to the first segment in the desc
chain not for the last segment of the desc chain.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Kedareswara rao Appana 2016-06-09 11:32:12 +05:30 committed by Vinod Koul
parent 6214786651
commit e167a0b6dc
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/xilinx/xilinx_vdma.c
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@ -1805,7 +1805,7 @@ static struct dma_async_tx_descriptor *xilinx_dma_prep_dma_cyclic(
/* For the last DMA_MEM_TO_DEV transfer, set EOP */
if (direction == DMA_MEM_TO_DEV) {
segment->hw.control |= XILINX_DMA_BD_SOP;
head_segment->hw.control |= XILINX_DMA_BD_SOP;
segment = list_last_entry(&desc->segments,
struct xilinx_axidma_tx_segment,
node);