diff options
| author | Philipp Zabel <p.zabel@pengutronix.de> | 2013-05-21 05:11:35 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2013-11-29 14:12:43 -0200 |
| commit | ea3aba8482be6f3e4815f4014fa7302fc77c9c3f (patch) | |
| tree | 452730ad3c76a2041ffc8935a3fd18aa60f09906 /drivers/media/v4l2-core/videobuf2-core.c | |
| parent | d8eec74a229f4e3448bfdff9ff3cd3f61bb1e63d (diff) | |
[media] videobuf2: Add support for file access mode flags for DMABUF exporting
Currently it is not possible for userspace to map a DMABUF exported buffer
with write permissions. This patch allows to also pass O_RDONLY/O_RDWR when
exporting the buffer, so that userspace may map it with write permissions.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-core.c')
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-core.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index b19b306c8f7f..57ba131f08ad 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -1824,8 +1824,8 @@ int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb) return -EINVAL; } - if (eb->flags & ~O_CLOEXEC) { - dprintk(1, "Queue does support only O_CLOEXEC flag\n"); + if (eb->flags & ~(O_CLOEXEC | O_ACCMODE)) { + dprintk(1, "Queue does support only O_CLOEXEC and access mode flags\n"); return -EINVAL; } @@ -1848,14 +1848,14 @@ int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb) vb_plane = &vb->planes[eb->plane]; - dbuf = call_memop(q, get_dmabuf, vb_plane->mem_priv); + dbuf = call_memop(q, get_dmabuf, vb_plane->mem_priv, eb->flags & O_ACCMODE); if (IS_ERR_OR_NULL(dbuf)) { dprintk(1, "Failed to export buffer %d, plane %d\n", eb->index, eb->plane); return -EINVAL; } - ret = dma_buf_fd(dbuf, eb->flags); + ret = dma_buf_fd(dbuf, eb->flags & ~O_ACCMODE); if (ret < 0) { dprintk(3, "buffer %d, plane %d failed to export (%d)\n", eb->index, eb->plane, ret); |