From 7566f39dfdc11f8a97d5810c6e6295a88f97ef91 Mon Sep 17 00:00:00 2001
From: Stefan Wahren <stefan.wahren@i2se.com>
Date: Thu, 6 Dec 2018 19:28:51 +0100
Subject: [PATCH] staging: bcm2835-camera: Abort probe if there is no camera
Git-commit: 7566f39dfdc11f8a97d5810c6e6295a88f97ef91
Patch-mainline: v5.0-rc1
References: bsc#1051510
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
.../vc04_services/bcm2835-camera/bcm2835-camera.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
index c04bdf070c87..d6fbef70c831 100644
--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
+++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
@@ -1841,6 +1841,12 @@ static int bcm2835_mmal_probe(struct platform_device *pdev)
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;
@@ -1940,6 +1946,9 @@ static int bcm2835_mmal_probe(struct platform_device *pdev)
pr_info("%s: error %d while loading driver\n",
BM2835_MMAL_MODULE_NAME, ret);
+cleanup_mmal:
+ vchiq_mmal_finalise(instance);
+
return ret;
}
--
2.19.2