[media] cx88: Don't allow opening a device while it is not ready
After registering the cdev, it would be possible do have an open on it.
In a matter of fact, some versions of udev do this. So, move registration
to the end and protect it with a mutex.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index e2fc455..f814886 100644
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -1882,6 +1882,15 @@
request_module("ir-kbd-i2c");
}
+ /* Sets device info at pci_dev */
+ pci_set_drvdata(pci_dev, dev);
+
+ /* initial device configuration */
+ mutex_lock(&core->lock);
+ cx88_set_tvnorm(core, core->tvnorm);
+ init_controls(core);
+ cx88_video_mux(core, 0);
+
/* register v4l devices */
dev->video_dev = cx88_vdev_init(core,dev->pci,
&cx8800_video_template,"video");
@@ -1923,16 +1932,6 @@
core->name, video_device_node_name(dev->radio_dev));
}
- /* everything worked */
- pci_set_drvdata(pci_dev,dev);
-
- /* initial device configuration */
- mutex_lock(&core->lock);
- cx88_set_tvnorm(core,core->tvnorm);
- init_controls(core);
- cx88_video_mux(core,0);
- mutex_unlock(&core->lock);
-
/* start tvaudio thread */
if (core->board.tuner_type != TUNER_ABSENT) {
core->kthread = kthread_run(cx88_audio_thread, core, "cx88 tvaudio");
@@ -1942,11 +1941,14 @@
core->name, err);
}
}
+ mutex_unlock(&core->lock);
+
return 0;
fail_unreg:
cx8800_unregister_video(dev);
free_irq(pci_dev->irq, dev);
+ mutex_unlock(&core->lock);
fail_core:
cx88_core_put(core,dev->pci);
fail_free: