[PATCH 2/2] media: videobuf2: Exit promptly if size = 0

[Ricardo Ribalda]

Exit as soon as possible if a driver wants to allocate a buffer of
size 0, and print a warning to help fixing the issue.

Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
---
 drivers/media/common/videobuf2/videobuf2-dma-sg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
index 030e48218687..c5b06a509566 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
@@ -105,7 +105,7 @@ static void *vb2_dma_sg_alloc(struct device *dev, unsigned long dma_attrs,
 	int ret;
 	int num_pages;
 
-	if (WARN_ON(!dev))
+	if (WARN_ON(!dev) || WARN_ON(!size))
 		return ERR_PTR(-EINVAL);
 
 	buf = kzalloc(sizeof *buf, GFP_KERNEL);
-- 
2.30.1.766.gb4fecdf3b7-goog