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| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2015-06-19 14:50:07 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-06-22 15:52:58 +0300 |
| commit | 77a3c6fd90c94f635edb00d4a65f485687538791 (patch) | |
| tree | a4641cd1727d055232b2cef75fbcc3ab73e7de0b /drivers/media | |
| parent | 6f32a8c97f11eb074027052b6b507891e5c9d8b1 (diff) | |
| download | linux-77a3c6fd90c94f635edb00d4a65f485687538791.tar.xz | |
[media] vb2: Don't WARN when v4l2_buffer.bytesused is 0 for multiplanar buffers
Commit f61bf13b6a07 ("[media] vb2: add allow_zero_bytesused flag to the
vb2_queue struct") added a WARN_ONCE to catch usage of a deprecated API
using a zero value for v4l2_buffer.bytesused.
However, the condition is checked incorrectly, as the v4L2_buffer
bytesused field is supposed to be ignored for multiplanar buffers. This
results in spurious warnings when using the multiplanar API.
Fix it by checking v4l2_buffer.bytesused for uniplanar buffers and
v4l2_plane.bytesused for multiplanar buffers.
Fixes: f61bf13b6a07 ("[media] vb2: add allow_zero_bytesused flag to the vb2_queue struct")
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: stable@vger.kernel.org # for v4.0
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-core.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index d835814a24d4..93b315459098 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -1242,6 +1242,23 @@ void vb2_discard_done(struct vb2_queue *q) } EXPORT_SYMBOL_GPL(vb2_discard_done); +static void vb2_warn_zero_bytesused(struct vb2_buffer *vb) +{ + static bool __check_once __read_mostly; + + if (__check_once) + return; + + __check_once = true; + __WARN(); + + pr_warn_once("use of bytesused == 0 is deprecated and will be removed in the future,\n"); + if (vb->vb2_queue->allow_zero_bytesused) + pr_warn_once("use VIDIOC_DECODER_CMD(V4L2_DEC_CMD_STOP) instead.\n"); + else + pr_warn_once("use the actual size instead.\n"); +} + /** * __fill_vb2_buffer() - fill a vb2_buffer with information provided in a * v4l2_buffer by the userspace. The caller has already verified that struct @@ -1252,16 +1269,6 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b { unsigned int plane; - if (V4L2_TYPE_IS_OUTPUT(b->type)) { - if (WARN_ON_ONCE(b->bytesused == 0)) { - pr_warn_once("use of bytesused == 0 is deprecated and will be removed in the future,\n"); - if (vb->vb2_queue->allow_zero_bytesused) - pr_warn_once("use VIDIOC_DECODER_CMD(V4L2_DEC_CMD_STOP) instead.\n"); - else - pr_warn_once("use the actual size instead.\n"); - } - } - if (V4L2_TYPE_IS_MULTIPLANAR(b->type)) { if (b->memory == V4L2_MEMORY_USERPTR) { for (plane = 0; plane < vb->num_planes; ++plane) { @@ -1302,6 +1309,9 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b struct v4l2_plane *pdst = &v4l2_planes[plane]; struct v4l2_plane *psrc = &b->m.planes[plane]; + if (psrc->bytesused == 0) + vb2_warn_zero_bytesused(vb); + if (vb->vb2_queue->allow_zero_bytesused) pdst->bytesused = psrc->bytesused; else @@ -1336,6 +1346,9 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b } if (V4L2_TYPE_IS_OUTPUT(b->type)) { + if (b->bytesused == 0) + vb2_warn_zero_bytesused(vb); + if (vb->vb2_queue->allow_zero_bytesused) v4l2_planes[0].bytesused = b->bytesused; else |