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-rw-r--r--drivers/dma/dw/platform.c20
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c
index 23616c57645c..e65ebe5ab88f 100644
--- a/drivers/dma/dw/platform.c
+++ b/drivers/dma/dw/platform.c
@@ -103,6 +103,7 @@ 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[DW_DMA_MAX_NR_MASTERS];
+ u32 nr_masters;
u32 nr_channels;
if (!np) {
@@ -110,6 +111,11 @@ dw_dma_parse_dt(struct platform_device *pdev)
return NULL;
}
+ if (of_property_read_u32(np, "dma-masters", &nr_masters))
+ return NULL;
+ if (nr_masters < 1 || nr_masters > DW_DMA_MAX_NR_MASTERS)
+ return NULL;
+
if (of_property_read_u32(np, "dma-channels", &nr_channels))
return NULL;
@@ -117,6 +123,7 @@ dw_dma_parse_dt(struct platform_device *pdev)
if (!pdata)
return NULL;
+ pdata->nr_masters = nr_masters;
pdata->nr_channels = nr_channels;
if (of_property_read_bool(np, "is_private"))
@@ -131,17 +138,10 @@ dw_dma_parse_dt(struct platform_device *pdev)
if (!of_property_read_u32(np, "block_size", &tmp))
pdata->block_size = tmp;
- if (!of_property_read_u32(np, "dma-masters", &tmp)) {
- if (tmp > DW_DMA_MAX_NR_MASTERS)
- return NULL;
-
- pdata->nr_masters = tmp;
- }
-
- if (!of_property_read_u32_array(np, "data_width", arr,
- pdata->nr_masters))
- for (tmp = 0; tmp < pdata->nr_masters; tmp++)
+ if (!of_property_read_u32_array(np, "data_width", arr, nr_masters)) {
+ for (tmp = 0; tmp < nr_masters; tmp++)
pdata->data_width[tmp] = arr[tmp];
+ }
return pdata;
}