aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorHans Verkuil <hans.verkuil@cisco.com>2014-04-07 08:44:56 -0300
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-04-16 18:41:36 -0300
commit412376a1532a9eb3eb66c9d07175f21cdbebdc09 (patch)
treef9ad6194c430b6f412d2f148171d9649a3ad979e
parentbc96f30c3b96ccb0b9bc0f79d1538cba75e501a9 (diff)
[media] vb2: fix handling of data_offset and v4l2_plane.reserved[]
The videobuf2-core did not zero the 'planes' array in __qbuf_userptr() and __qbuf_dmabuf(). That's now memset to 0. Without this the reserved array in struct v4l2_plane would be non-zero, causing v4l2-compliance errors. More serious is the fact that data_offset was not handled correctly: - for capture devices it was never zeroed, which meant that it was uninitialized. Unless the driver sets it it was a completely random number. With the memset above this is now fixed. - __qbuf_dmabuf had a completely incorrect length check that included data_offset. - in __fill_vb2_buffer in the DMABUF case the data_offset field was unconditionally copied from v4l2_buffer to v4l2_plane when this should only happen in the output case. - in the single-planar case data_offset was never correctly set to 0. The single-planar API doesn't support data_offset, so setting it to 0 is the right thing to do. This too is now solved by the memset. All these issues were found with v4l2-compliance. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Pawel Osciak <pawel@osciak.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
-rw-r--r--drivers/media/v4l2-core/videobuf2-core.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index 98ddeb6c05c1..b20e0fbc762a 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -1234,8 +1234,6 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
b->m.planes[plane].m.fd;
v4l2_planes[plane].length =
b->m.planes[plane].length;
- v4l2_planes[plane].data_offset =
- b->m.planes[plane].data_offset;
}
}
} else {
@@ -1245,10 +1243,8 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
* In videobuf we use our internal V4l2_planes struct for
* single-planar buffers as well, for simplicity.
*/
- if (V4L2_TYPE_IS_OUTPUT(b->type)) {
+ if (V4L2_TYPE_IS_OUTPUT(b->type))
v4l2_planes[0].bytesused = b->bytesused;
- v4l2_planes[0].data_offset = 0;
- }
if (b->memory == V4L2_MEMORY_USERPTR) {
v4l2_planes[0].m.userptr = b->m.userptr;
@@ -1258,9 +1254,7 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
if (b->memory == V4L2_MEMORY_DMABUF) {
v4l2_planes[0].m.fd = b->m.fd;
v4l2_planes[0].length = b->length;
- v4l2_planes[0].data_offset = 0;
}
-
}
/* Zero flags that the vb2 core handles */
@@ -1303,6 +1297,7 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
int write = !V4L2_TYPE_IS_OUTPUT(q->type);
bool reacquired = vb->planes[0].mem_priv == NULL;
+ memset(planes, 0, sizeof(planes[0]) * vb->num_planes);
/* Copy relevant information provided by the userspace */
__fill_vb2_buffer(vb, b, planes);
@@ -1414,6 +1409,7 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
int write = !V4L2_TYPE_IS_OUTPUT(q->type);
bool reacquired = vb->planes[0].mem_priv == NULL;
+ memset(planes, 0, sizeof(planes[0]) * vb->num_planes);
/* Copy relevant information provided by the userspace */
__fill_vb2_buffer(vb, b, planes);
@@ -1431,8 +1427,7 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
if (planes[plane].length == 0)
planes[plane].length = dbuf->size;
- if (planes[plane].length < planes[plane].data_offset +
- q->plane_sizes[plane]) {
+ if (planes[plane].length < q->plane_sizes[plane]) {
dprintk(1, "qbuf: invalid dmabuf length for plane %d\n",
plane);
ret = -EINVAL;

Privacy Policy