dma: mxs-dma: Fix build warnings with W=1

Fix the following warnings when building with W=1 option:

drivers/dma/mxs-dma.c: In function 'mxs_dma_alloc_chan_resources':
drivers/dma/mxs-dma.c:368:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
drivers/dma/mxs-dma.c: In function 'mxs_dma_prep_slave_sg':
drivers/dma/mxs-dma.c:481:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
drivers/dma/mxs-dma.c:494:3: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
drivers/dma/mxs-dma.c:515:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
drivers/dma/mxs-dma.c: In function 'mxs_dma_prep_dma_cyclic':
drivers/dma/mxs-dma.c:563:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 9f02e794b12b..8f6d30d37c45 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -109,7 +109,7 @@ struct mxs_dma_chan {
         struct dma_chan                 chan;
         struct dma_async_tx_descriptor  desc;
         struct tasklet_struct           tasklet;
-        int                             chan_irq;
+        unsigned int                    chan_irq;
         struct mxs_dma_ccw              *ccw;
         dma_addr_t                      ccw_phys;
         int                             desc_count;
@@ -441,7 +441,7 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
         struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
         struct mxs_dma_ccw *ccw;
         struct scatterlist *sg;
-        int i, j;
+        u32 i, j;
         u32 *pio;
         bool append = flags & DMA_PREP_INTERRUPT;
         int idx = append ? mxs_chan->desc_count : 0;
@@ -537,8 +537,8 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_dma_cyclic(
 {
         struct mxs_dma_chan *mxs_chan = to_mxs_dma_chan(chan);
         struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
-        int num_periods = buf_len / period_len;
-        int i = 0, buf = 0;
+        u32 num_periods = buf_len / period_len;
+        u32 i = 0, buf = 0;
 
         if (mxs_chan->status == DMA_IN_PROGRESS)
                 return NULL;