lkml.org 
[lkml]   [2015]   [Jul]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.1 063/267] [media] vb2: Dont WARN when v4l2_buffer.bytesused is 0 for multiplanar buffers
Date
4.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

commit 77a3c6fd90c94f635edb00d4a65f485687538791 upstream.

Commit f61bf13b6a07 ("[media] vb2: add allow_zero_bytesused flag to the
vb2_queue struct") added a WARN_ONCE to catch usage of a deprecated API
using a zero value for v4l2_buffer.bytesused.

However, the condition is checked incorrectly, as the v4L2_buffer
bytesused field is supposed to be ignored for multiplanar buffers. This
results in spurious warnings when using the multiplanar API.

Fix it by checking v4l2_buffer.bytesused for uniplanar buffers and
v4l2_plane.bytesused for multiplanar buffers.

Fixes: f61bf13b6a07 ("[media] vb2: add allow_zero_bytesused flag to the vb2_queue struct")

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/media/v4l2-core/videobuf2-core.c | 33 +++++++++++++++++++++----------
1 file changed, 23 insertions(+), 10 deletions(-)

--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -1237,6 +1237,23 @@ void vb2_discard_done(struct vb2_queue *
}
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
@@ -1247,16 +1264,6 @@ static void __fill_vb2_buffer(struct vb2
{
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) {
@@ -1297,6 +1304,9 @@ static void __fill_vb2_buffer(struct vb2
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
@@ -1331,6 +1341,9 @@ static void __fill_vb2_buffer(struct vb2
}

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



\
 
 \ /
  Last update: 2015-07-31 22:01    [W:0.504 / U:0.560 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site