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Commit efa93dbe authored by Karsten Wiese's avatar Karsten Wiese Committed by Linus Torvalds
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[PATCH] usbaudio: 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: default avatarKarsten Wiese <annabellesgarden@yahoo.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: default avatarChris Wright <chrisw@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 9a476969

sound/usb/usbaudio.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

	}