[PATCH -next] dma: Add dev_id parameter description in request_dma_bycap

[Yang Li]

This patch adds the missing description for the dev_id parameter in the
kernel documentation for the request_dma_bycap function.

Signed-off-by: Yang Li <yang.lee@xxxxxxxxxxxxxxxxx>
---
 arch/sh/drivers/dma/dma-api.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/sh/drivers/dma/dma-api.c b/arch/sh/drivers/dma/dma-api.c
index 89cd4a3b4cca..65005d348877 100644
--- a/arch/sh/drivers/dma/dma-api.c
+++ b/arch/sh/drivers/dma/dma-api.c
@@ -116,6 +116,7 @@ static int search_cap(const char **haystack, const char *needle)
  * request_dma_bycap - Allocate a DMA channel based on its capabilities
  * @dmac: List of DMA controllers to search
  * @caps: List of capabilities
+ * @dev_id: Unique identifier for the device that is requesting a DMA channel
  *
  * Search all channels of all DMA controllers to find a channel which
  * matches the requested capabilities. The result is the channel
-- 
2.20.1.7.g153144c