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

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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>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Karsten Wiese 2005-06-14 09:54:55 -07:00 committed by Linus Torvalds
parent 9a47696970
commit efa93dbedd
1 changed files with 1 additions and 1 deletions
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2
sound/usb/usbaudio.c
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@ -3289,7 +3289,7 @@ 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);
}