iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

staging: mmal-vchiq: Fix incorrect static vchiq_instance.

Browse Source 
[ Upstream commit afc023da53e46b88552822f2fe035c7129c505a2 ]

For some reason lost in history function vchiq_mmal_init used
a static variable for storing the vchiq_instance.
This value is retrieved from vchiq per instance, so worked fine
until you try to call vchiq_mmal_init multiple times concurrently
when things then go wrong. This seemed to happen quite frequently
if using the cutdown firmware (no MMAL or VCSM services running)
as the vchiq_connect then failed, and one or other vchiq_shutdown
was working on an invalid handle.

Remove the static so that each caller gets a unique vchiq_instance.

Fixes: 7b3ad5abf027 ("staging: Import the BCM2835 MMAL-based V4L2 camera driver.")
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1621979857-26754-1-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dave Stevenson 2021-05-25 23:57:37 +02:00 committed by Greg Kroah-Hartman
parent cf05986cc4
commit 5a766253e3
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
View File

@ -1862,7 +1862,7 @@ int vchiq_mmal_init(struct vchiq_mmal_instance **out_instance)
int status;
int err = -ENODEV;
struct vchiq_mmal_instance *instance;
static struct vchiq_instance *vchiq_instance;
struct vchiq_instance *vchiq_instance;
struct vchiq_service_params_kernel params = {
.version = VC_MMAL_VER,
.version_min = VC_MMAL_MIN_VER,