This patch fix an unchecked dereference warning by returning operation
not permitted when stm32_dma_start_transfer() does not succeed to allocate
a virtual channel descriptor.
Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@xxxxxxxxx>
---
drivers/dma/stm32-dma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c
index 12f3a3e..0214bcf 100644
--- a/drivers/dma/stm32-dma.c
+++ b/drivers/dma/stm32-dma.c
@@ -437,7 +437,7 @@ static int stm32_dma_start_transfer(struct stm32_dma_chan *chan)
if (!chan->desc) {
vdesc = vchan_next_desc(&chan->vchan);
if (!vdesc)
- return 0;
+ return -EPERM;
chan->desc = to_stm32_dma_desc(vdesc);
chan->next_sg = 0;
--
1.9.1
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