V4L/DVB: IR/lirc_dev: check for valid irctl in unregister path
Prompted by Red Hat bugzilla #633023
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/IR/lirc_dev.c b/drivers/media/IR/lirc_dev.c
index 899891b..0572053 100644
--- a/drivers/media/IR/lirc_dev.c
+++ b/drivers/media/IR/lirc_dev.c
@@ -366,6 +366,11 @@
}
ir = irctls[minor];
+ if (!ir) {
+ printk(KERN_ERR "lirc_dev: lirc_unregister_driver: "
+ "failed to get irctl struct for minor %d!", minor);
+ return -ENOENT;
+ }
mutex_lock(&lirc_dev_lock);