mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 00:11:13 +00:00
538a1d740c
The patches were generated from the RPi repo with the following command: git format-patch v6.6.58..rpi-6.6.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
60 lines
2.1 KiB
Diff
60 lines
2.1 KiB
Diff
From cc0c868b51941f0ff2676970b70d388f1722e7fe Mon Sep 17 00:00:00 2001
|
|
From: Paul Elder <paul.elder@ideasonboard.com>
|
|
Date: Thu, 10 Oct 2024 14:52:53 +0100
|
|
Subject: [PATCH 1326/1350] media: platform: video-mux: Fix mutex locking
|
|
|
|
The current order of locking between the driver mutex and the v4l2
|
|
subdev state lock causes a circuluar locking dependency when trying to
|
|
set up a link. Fix this.
|
|
|
|
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
|
|
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
|
|
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
|
|
---
|
|
drivers/media/platform/video-mux.c | 6 +++---
|
|
1 file changed, 3 insertions(+), 3 deletions(-)
|
|
|
|
--- a/drivers/media/platform/video-mux.c
|
|
+++ b/drivers/media/platform/video-mux.c
|
|
@@ -70,6 +70,7 @@ static int video_mux_link_setup(struct m
|
|
{
|
|
struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
|
|
struct v4l2_subdev *source_sd;
|
|
+ struct v4l2_subdev_state *sd_state;
|
|
struct video_mux *vmux = v4l2_subdev_to_video_mux(sd);
|
|
u16 source_pad = entity->num_pads - 1;
|
|
int ret = 0;
|
|
@@ -85,10 +86,10 @@ static int video_mux_link_setup(struct m
|
|
remote->entity->name, remote->index, local->entity->name,
|
|
local->index, flags & MEDIA_LNK_FL_ENABLED);
|
|
|
|
+ sd_state = v4l2_subdev_lock_and_get_active_state(sd);
|
|
mutex_lock(&vmux->lock);
|
|
|
|
if (flags & MEDIA_LNK_FL_ENABLED) {
|
|
- struct v4l2_subdev_state *sd_state;
|
|
struct v4l2_mbus_framefmt *source_mbusformat;
|
|
|
|
if (vmux->active == local->index)
|
|
@@ -106,12 +107,10 @@ static int video_mux_link_setup(struct m
|
|
vmux->active = local->index;
|
|
|
|
/* Propagate the active format to the source */
|
|
- sd_state = v4l2_subdev_lock_and_get_active_state(sd);
|
|
source_mbusformat = v4l2_subdev_get_pad_format(sd, sd_state,
|
|
source_pad);
|
|
*source_mbusformat = *v4l2_subdev_get_pad_format(sd, sd_state,
|
|
vmux->active);
|
|
- v4l2_subdev_unlock_state(sd_state);
|
|
|
|
source_sd = media_entity_to_v4l2_subdev(remote->entity);
|
|
vmux->subdev.ctrl_handler = source_sd->ctrl_handler;
|
|
@@ -129,6 +128,7 @@ static int video_mux_link_setup(struct m
|
|
|
|
out:
|
|
mutex_unlock(&vmux->lock);
|
|
+ v4l2_subdev_unlock_state(sd_state);
|
|
return ret;
|
|
}
|
|
|