If the VIDIOC_QBUF ioctl fails due a wrong dmabuf length, it's
useful to get the invalid and minimum lengths as a debug info.
Before this patch:
vb2-core: __qbuf_dmabuf: invalid dmabuf length for plane 1
After this patch:
vb2-core: __qbuf_dmabuf: invalid dmabuf length 221248 for plane 1, minimum length 410880
Signed-off-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
---
Changes in v2:
- Use %u instead of %d (Sakari Ailus)
- Include min_length (Sakari Ailus)
drivers/media/v4l2-core/videobuf2-core.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index b6fbc04f9699..bbba50d6e1ad 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -1227,8 +1227,10 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const void *pb)
planes[plane].length = dbuf->size;
if (planes[plane].length < vb->planes[plane].min_length) {
- dprintk(1, "invalid dmabuf length for plane %d\n",
- plane);
+ dprintk(1, "invalid dmabuf length %u for plane %d, "
+ "minimum length %u\n",
+ planes[plane].length, plane,
+ vb->planes[plane].min_length);
dma_buf_put(dbuf);
ret = -EINVAL;
goto err;
--
2.5.5
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