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>

diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 9f02e794b12b00d4ed75d62a67bd255f321992ee..8f6d30d37c45bd4e995f160e4e85fc55d81b1fe5 100644 (file)
--- 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;