dmaengine: xilinx_dma: Fix warning variable prev set but not used

This patch fixes the below sparse warning in the driver
drivers/dma/xilinx/xilinx_dma.c: In function ‘xilinx_vdma_dma_prep_interleaved’:
drivers/dma/xilinx/xilinx_dma.c:1614:43: warning: variable ‘prev’ set but not used [-Wunused-but-set-variable]
  struct xilinx_vdma_tx_segment *segment, *prev = NULL;

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index e32ebe0837af15528a975b2b454e7dcba9ae7d9f..855ea14f6877ba1307a2a3aa3fe20a5eeaaff8bf 100644 (file)
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -1611,7 +1611,7 @@ xilinx_vdma_dma_prep_interleaved(struct dma_chan *dchan,
 {
        struct xilinx_dma_chan *chan = to_xilinx_chan(dchan);
        struct xilinx_dma_tx_descriptor *desc;
-       struct xilinx_vdma_tx_segment *segment, *prev = NULL;
+       struct xilinx_vdma_tx_segment *segment;
        struct xilinx_vdma_desc_hw *hw;
 
        if (!is_slave_direction(xt->dir))
@@ -1665,8 +1665,6 @@ xilinx_vdma_dma_prep_interleaved(struct dma_chan *dchan,
        /* Insert the segment into the descriptor segments list. */
        list_add_tail(&segment->node, &desc->segments);
 
-       prev = segment;
-
        /* Link the last hardware descriptor with the first. */
        segment = list_first_entry(&desc->segments,
                                   struct xilinx_vdma_tx_segment, node);