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| author | Stefan Wahren <stefan.wahren@i2se.com> | 2018-12-06 19:28:51 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-27 14:46:07 +0100 |
| commit | 0c52e16253a5d6d810696a647107ea55909708f2 (patch) | |
| tree | 4399c17fc67e5005bf994633662f2044508a863d /drivers/staging | |
| parent | c7c34c31038087b6ba47c193f38a055d3adcd71d (diff) | |
staging: bcm2835-camera: Abort probe if there is no camera
[ Upstream commit 7566f39dfdc11f8a97d5810c6e6295a88f97ef91 ]
Abort the probing of the camera driver in case there isn't a camera
actually connected to the Raspberry Pi. This solution also avoids a
NULL ptr dereference of mmal instance on driver unload.
Fixes: 7b3ad5abf027 ("staging: Import the BCM2835 MMAL-based V4L2 camera driver.")
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c index 377da037f31c..b521752d9aa0 100644 --- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c +++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c @@ -1849,6 +1849,12 @@ static int __init bm2835_mmal_init(void) num_cameras = get_num_cameras(instance, resolutions, MAX_BCM2835_CAMERAS); + + if (num_cameras < 1) { + ret = -ENODEV; + goto cleanup_mmal; + } + if (num_cameras > MAX_BCM2835_CAMERAS) num_cameras = MAX_BCM2835_CAMERAS; @@ -1948,6 +1954,9 @@ cleanup_gdev: pr_info("%s: error %d while loading driver\n", BM2835_MMAL_MODULE_NAME, ret); +cleanup_mmal: + vchiq_mmal_finalise(instance); + return ret; } |