linux-kernel - [PATCH] [media] vb2: include length in dmabuf qbuf debug message

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Date:	Thu, 14 Jul 2016 11:09:34 -0400
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	linux-kernel@...r.kernel.org
Cc:	Marek Szyprowski <m.szyprowski@...sung.com>,
	Mauro Carvalho Chehab <mchehab@...pensource.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Pawel Osciak <pawel@...iak.com>, linux-media@...r.kernel.org,
	Javier Martinez Canillas <javier@....samsung.com>
Subject: [PATCH] [media] vb2: include length in dmabuf qbuf debug message

If the the VIDIOC_QBUF ioctl fails due a wrong dmabuf length,
it's useful to get the invalid length as a debug information.

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

Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>

---

 drivers/media/v4l2-core/videobuf2-core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index ca8ffeb56d72..97d1483e0f7a 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -1228,8 +1228,8 @@ 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 %d for plane %d\n",
+				planes[plane].length, plane);
 			dma_buf_put(dbuf);
 			ret = -EINVAL;
 			goto err;
-- 
2.5.5