[PATCH 01/13] dmaengine: of_dma: Correct return code for of_dma_request_slave_channel in case !CONFIG_OF

Peter Ujfalusi
2015-05-26T13:26:41Z

of_dma_request_slave_channel should return either pointer for valid
dma_chan or ERR_PTR() error code, NULL is not expected to be returned.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
---
include/linux/of_dma.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/of_dma.h b/include/linux/of_dma.h
index 98ba7525929e..0fd80be152c4 100644
--- a/include/linux/of_dma.h
+++ b/include/linux/of_dma.h
@@ -80,7 +80,7 @@ static inline int of_dma_router_register(struct device_node *np,
static inline struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
const char *name)
{
- return NULL;
+ return ERR_PTR(-ENODEV);
}

static inline struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
--
2.3.5