[PATCH] m2m-deinterlace: don't return zero on failure paths in deinterlace_probe()

[Alexey Khoroshilov]

If DMA does not support INTERLEAVE, deinterlace_probe() breaks off
initialization, releases dma channel, but returns zero.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
---
 drivers/media/platform/m2m-deinterlace.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/m2m-deinterlace.c b/drivers/media/platform/m2m-deinterlace.c
index bedc7cc4c7d6..980066b8d32a 100644
--- a/drivers/media/platform/m2m-deinterlace.c
+++ b/drivers/media/platform/m2m-deinterlace.c
@@ -1017,6 +1017,7 @@ static int deinterlace_probe(struct platform_device *pdev)
 
 	if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
 		dev_err(&pdev->dev, "DMA does not support INTERLEAVE\n");
+		ret = -ENODEV;
 		goto rel_dma;
 	}
 
-- 
2.7.4