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media: videobuf2: Exit promptly if size = 0

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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@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Ricardo Ribalda
2021-03-09 21:51:08 +01:00
committed by Mauro Carvalho Chehab
parent a9e3863d00
commit 9cc25c4bea
1 changed files with 1 additions and 1 deletions
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2
drivers/media/common/videobuf2/videobuf2-dma-sg.c
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@ -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);