]> git.itanic.dy.fi Git - linux-stable/commit
wusbcore: fix kernel panic when disconnecting a wireless USB->serial device
authorThomas Pugliese <thomas.pugliese@gmail.com>
Fri, 9 Aug 2013 14:52:13 +0000 (09:52 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 20 Aug 2013 15:43:05 +0000 (08:43 -0700)
commitf34a4837cd0b28abe7449e591a23cb32ab128520
tree545fb90294b2545d40b0d4a08acbde9068c9ea14
parent1dba303727f52ea062580b0a9b3f0c3b462769cf
wusbcore: fix kernel panic when disconnecting a wireless USB->serial device

commit ec58fad1feb76c323ef47efff1d1e8660ed4644c upstream.

This patch fixes a kernel panic that can occur when disconnecting a
wireless USB->serial device.  When the serial device disconnects, the
device cleanup procedure ends up calling usb_hcd_disable_endpoint on the
serial device's endpoints.  The wusbcore uses the ABORT_RPIPE command to
abort all transfers on the given endpoint but it does not properly give
back the URBs when the transfer results return from the HWA.  This patch
prevents the transfer result processing code from bailing out when it sees
a WA_XFER_STATUS_ABORTED result code so that these urbs are flushed
properly by usb_hcd_disable_endpoint.  It also updates wa_urb_dequeue to
handle the case where the endpoint has already been cleaned up when
usb_kill_urb is called which is where the panic originally occurred.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/wusbcore/wa-xfer.c