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, 3 insertions, 1 deletions

diff --git a/include/linux/platform_data/dma-dw.h b/include/linux/platform_data/dma-dw.h
index 359127d290e7..87ac14c584f2 100644
--- a/include/linux/platform_data/dma-dw.h
+++ b/include/linux/platform_data/dma-dw.h
@@ -13,6 +13,8 @@
 
 #include <linux/device.h>
 
+#define DW_DMA_MAX_NR_MASTERS   4
+
 /**
  * struct dw_dma_slave - Controller-specific information about a slave
  *
@@ -53,7 +55,7 @@ struct dw_dma_platform_data {
         unsigned char   chan_priority;
         unsigned short  block_size;
         unsigned char   nr_masters;
-        unsigned char   data_width[4];
+        unsigned char   data_width[DW_DMA_MAX_NR_MASTERS];
 };
 
 #endif /* _PLATFORM_DATA_DMA_DW_H */