dma: xilinx: Initialize variables xilinx_dma driver.

desc was never initialized so dereferencing that pointer would invariably
result in a null pointer exception.  The residue must also be initialized
to zero.  These changes both fix compiler warnings.

Signed-off-by: Joseph Zavodny <Joseph.Zavodny@jhuapl.edu>
Acked-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 130e323b8872a2074cdbe1bef540adbbee3919b6..d32db15e6244bf099578f8c8cf5fc6ffeab6343f 100644 (file)
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -484,12 +484,12 @@ static enum dma_status xilinx_dma_tx_status(struct dma_chan *dchan,
                                            struct dma_tx_state *txstate)
 {
        struct xilinx_dma_chan *chan = to_xilinx_chan(dchan);
-       struct xilinx_dma_tx_descriptor *desc;
+       struct xilinx_dma_tx_descriptor *desc = chan->active_desc;
        struct xilinx_dma_tx_segment *segment;
        struct xilinx_dma_desc_hw *hw;
        enum dma_status ret;
        unsigned long flags;
-       u32 residue;
+       u32 residue = 0;
 
        ret = dma_cookie_status(dchan, cookie, txstate);
        if (ret == DMA_COMPLETE || !txstate)