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media: cedrus: Forbid setting new formats on busy queues 

Check that our queues are not busy before setting the format or return
EBUSY if that's the case. This ensures that our format can't change
once buffers are allocated for the queue.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Paul Kocialkowski 2019-02-14 04:25:11 -05:00 committed by Mauro Carvalho Chehab
parent ffaec3b21a
commit 9dacde5ed0
1 changed files with 10 additions and 0 deletions
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10
drivers/staging/media/sunxi/cedrus/cedrus_video.c
View File

@ -282,8 +282,13 @@ static int cedrus_s_fmt_vid_cap(struct file *file, void *priv,
{
struct cedrus_ctx *ctx = cedrus_file2ctx(file);
struct cedrus_dev *dev = ctx->dev;
struct vb2_queue *vq;
int ret;
vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
if (vb2_is_busy(vq))
return -EBUSY;
ret = cedrus_try_fmt_vid_cap(file, priv, f);
if (ret)
return ret;
@ -299,8 +304,13 @@ static int cedrus_s_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
struct cedrus_ctx *ctx = cedrus_file2ctx(file);
struct vb2_queue *vq;
int ret;
vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
if (vb2_is_busy(vq))
return -EBUSY;
ret = cedrus_try_fmt_vid_out(file, priv, f);
if (ret)
return ret;