diff options
-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 |