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[media] videobuf2-core: Check user space planes array in dqbuf

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The number of planes in videobuf2 is specific to a buffer. In order to
verify that the planes array provided by the user is long enough, a new
vb2_buf_op is required.

Call __verify_planes_array() when the dequeued buffer is known. Return an
error to the caller if there was one, otherwise remove the buffer from the
done list.

Signed-off-by: Sakari Ailus <[email protected]>
Acked-by: Hans Verkuil <[email protected]>
Cc: [email protected] # for v4.4 and later
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Sakari Ailus 2016-04-03 16:15:00 -03:00 • committed by Mauro Carvalho Chehab
commit e7e0c3e265
2 changed files with 9 additions and 5 deletions
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4
include/media/videobuf2-core.h
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@ -375,6 +375,9 @@ struct vb2_ops {
/**
* struct vb2_ops - driver-specific callbacks
*
* @verify_planes_array: Verify that a given user space structure contains
* enough planes for the buffer. This is called
* for each dequeued buffer.
* @fill_user_buffer: given a vb2_buffer fill in the userspace structure.
* For V4L2 this is a struct v4l2_buffer.
* @fill_vb2_buffer: given a userspace structure, fill in the vb2_buffer.
@ -384,6 +387,7 @@ struct vb2_ops {
* the vb2_buffer struct.
*/
struct vb2_buf_ops {
int (*verify_planes_array)(struct vb2_buffer *vb, const void *pb);
void (*fill_user_buffer)(struct vb2_buffer *vb, void *pb);
int (*fill_vb2_buffer)(struct vb2_buffer *vb, const void *pb,
struct vb2_plane *planes);