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[PATCH] usbaudio: prevent oops & dead keyboard on usb unplugging while the device is being used 

Summary: prevent oops & dead keyboard on usb unplugging while the device is being used

Without this patch, some usb kobjects, which are parents to
the usx2y's kobjects can be freed before the usx2y's.
This led to an oops in get_kobj_path_length() and a dead
keyboard, when the usx2y's kobjects were freed.
The patch ensures the correct sequence.
Tested ok on kernel 2.6.12-rc2.

Present in ALSA cvs

Signed-off-by: Karsten Wiese <annabellesgarden@yahoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Wright <chrisw@osdl.org>
This commit is contained in:
Gregor Jasny 2005-04-28 09:26:48 +02:00 committed by
parent 87127723a5
commit 439de7e64f
1 changed files with 1 additions and 1 deletions
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2
sound/usb/usbaudio.c
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@ -3276,7 +3276,7 @@ static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
}
usb_chip[chip->index] = NULL;
up(&register_mutex);
snd_card_free_in_thread(card);
snd_card_free(card);
} else {
up(&register_mutex);
}