Here is the deal:
we have a guy here with a webcam and the following scenario:
1. ov511 disconnects, everything dies/releases/closes fine,
2. webcam soft starts polling open/sleep/open/sleep/...
3. ov511_probe works and reaches ov511_configure,
calls video_register_device().
4. Webcam software opens and oopses on the semafore
that was not initialized yet.
I think video_register_device needs to be done last, when
everything else is ready to accept appliction requests.
Someone please review. The error handling style
of ov511 spins my head. I may be missing a code path somewhere.
Thanks in advance,
-- Pete
--- linux-2.4.2-ac19/drivers/usb/ov511.c Thu Jan 4 13:15:32 2001
+++ linux-2.4.2-ac19-p3/drivers/usb/ov511.c Thu Mar 22 19:55:59 2001
@@ -3141,11 +3141,6 @@
init_waitqueue_head(&ov511->wq);
- if (video_register_device(&ov511->vdev, VFL_TYPE_GRABBER) < 0) {
- err("video_register_device failed");
- return -EBUSY;
- }
-
if (ov511_write_regvals(dev, aRegvalsInit)) goto error;
if (ov511_write_regvals(dev, aRegvalsNorm511)) goto error;
@@ -3214,7 +3209,6 @@
return 0;
error:
- video_unregister_device(&ov511->vdev);
usb_driver_release_interface(&ov511_driver,
&dev->actconfig->interface[ov511->iface]);
@@ -3323,6 +3317,11 @@
ov511->buf_state = BUF_NOT_ALLOCATED;
} else {
err("Failed to configure camera");
+ goto error;
+ }
+
+ if (video_register_device(&ov511->vdev, VFL_TYPE_GRABBER) < 0) {
+ err("video_register_device failed");
goto error;
}
-
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