From: Hans Verkuil <hans.verk...@cisco.com>
The prepare memop now returns an error, so we need to be able to handle that.
In addition, prepare has to be called before buf_prepare since in the dma-sg
case buf_prepare expects that the dma memory is mapped and it can use the
sg_table.
So call the prepare memop before calling buf_prepare and clean up the memory
in case of an error.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/v4l2-core/videobuf2-core.c | 46 +++++++++++++++++++++++---------
1 file changed, 34 insertions(+), 12 deletions(-)
diff --git a/drivers/media/v4l2-core/videobuf2-core.c
b/drivers/media/v4l2-core/videobuf2-core.c
index 087cd62..1cb3423 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -1346,13 +1346,43 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb,
const struct v4l2_buffer *b
}
}
+static int __buf_memory_prepare(struct vb2_buffer *vb)
+{
+ int ret = call_vb_qop(vb, buf_prepare_for_cpu, vb);
+ unsigned int plane;
+
+ if (ret)
+ return ret;
+
+ /* sync buffers */
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ ret = call_memop(vb, prepare, vb->planes[plane].mem_priv);
+ if (ret) {
+ for (; plane; plane--)
+ call_void_memop(vb, finish, vb->planes[plane -
1].mem_priv);
+ call_void_vb_qop(vb, buf_finish_for_cpu, vb);
+ dprintk(1, "buffer memory preparation failed\n");
+ return ret;
+ }
+ }
+
+ ret = call_vb_qop(vb, buf_prepare, vb);
+ if (ret) {
+ dprintk(1, "buffer preparation failed\n");
+ for (plane = 0; plane < vb->num_planes; ++plane)
+ call_void_memop(vb, finish, vb->planes[plane].mem_priv);
+ call_void_vb_qop(vb, buf_finish_for_cpu, vb);
+ }
+ return ret;
+}
+
/**
* __qbuf_mmap() - handle qbuf of an MMAP buffer
*/
static int __qbuf_mmap(struct vb2_buffer *vb, const struct v4l2_buffer *b)
{
__fill_vb2_buffer(vb, b, vb->v4l2_planes);
- return call_vb_qop(vb, buf_prepare, vb);
+ return __buf_memory_prepare(vb);
}
/**
@@ -1437,11 +1467,10 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const
struct v4l2_buffer *b)
}
}
- ret = call_vb_qop(vb, buf_prepare, vb);
+ ret = __buf_memory_prepare(vb);
if (ret) {
- dprintk(1, "buffer preparation failed\n");
call_void_vb_qop(vb, buf_cleanup, vb);
- goto err;
+ return ret;
}
return 0;
@@ -1561,9 +1590,8 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const
struct v4l2_buffer *b)
}
}
- ret = call_vb_qop(vb, buf_prepare, vb);
+ ret = __buf_memory_prepare(vb);
if (ret) {
- dprintk(1, "buffer preparation failed\n");
call_void_vb_qop(vb, buf_cleanup, vb);
goto err;
}
@@ -1628,12 +1656,6 @@ static int __buf_prepare(struct vb2_buffer *vb, const
struct v4l2_buffer *b)
vb->v4l2_buf.timestamp.tv_usec = 0;
vb->v4l2_buf.sequence = 0;
- ret = call_vb_qop(vb, buf_prepare_for_cpu, vb);
- if (ret) {
- dprintk(1, "buf_prepare_for_cpu failed\n");
- return ret;
- }
-
switch (q->memory) {
case V4L2_MEMORY_MMAP:
ret = __qbuf_mmap(vb, b);
--
2.1.0
--
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