From: Clemens Ladisch <clemens@ladisch.de>
Date: Sat, 15 Oct 2011 21:19:25 +0000 (+0200)
Subject: ALSA: ua101: fix crash when unplugging
X-Git-Tag: v3.2-rc1~38^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=862a6244eb9f9f5123fe819454fcfcae0ee1f2f9;p=pandora-kernel.git

ALSA: ua101: fix crash when unplugging

If the device is unplugged while running, it is possible for a PCM
device to be closed after the disconnect callback has returned.  This
means that kill_stream_urb() and disable_iso_interface() would try to
access already-invalid or freed USB data structures.

The function free_usb_related_resources() was intended to prevent this,
but forgot to clear the affected variables.

Reported-and-tested-by: Olivier Courtay <olivier@courtay.org>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: 2.6.33+ <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

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