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dmaengine: dw: define DW_DMA_MAX_NR_MASTERS

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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>
This commit is contained in:
Andy Shevchenko
2015-01-13 19:08:14 +02:00
committed by Vinod Koul
parent cfd8fef322
commit d8ded50f8b
8 changed files with 13 additions and 10 deletions
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4
drivers/dma/dw/platform.c
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@@ -99,7 +99,7 @@ dw_dma_parse_dt(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct dw_dma_platform_data *pdata;
u32 tmp, arr[4];
u32 tmp, arr[DW_DMA_MAX_NR_MASTERS];
if (!np) {
dev_err(&pdev->dev, "Missing DT data\n");
@@ -126,7 +126,7 @@ dw_dma_parse_dt(struct platform_device *pdev)
pdata->block_size = tmp;
if (!of_property_read_u32(np, "dma-masters", &tmp)) {
if (tmp > 4)
if (tmp > DW_DMA_MAX_NR_MASTERS)
return NULL;
pdata->nr_masters = tmp;