dmaengine: dw: define DW_DMA_MAX_NR_MASTERS

Instead of using magic number in the code the patch provides
DW_DMA_MAX_NR_MASTERS constant.

While here, restrict the reading of data width array by amount of the actual
number of AHB masters.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index fcb9a916e6f6..0469d8eda253 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -1562,7 +1562,8 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
                 }
         } else {
                 dw->nr_masters = pdata->nr_masters;
-                memcpy(dw->data_width, pdata->data_width, 4);
+                for (i = 0; i < dw->nr_masters; i++)
+                        dw->data_width[i] = pdata->data_width[i];
         }
 
         /* Calculate all channel mask before DMA setup */