USB: usb_wwan: fix urb leak in write error path
authorxiao jin <jin.xiao@intel.com>
Mon, 26 May 2014 17:23:13 +0000 (19:23 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 1 Jul 2014 03:09:43 +0000 (20:09 -0700)
commit866c4e127c31e507fa851e6346a129945df05d65
tree1529e615787391fbed85052a5a8f0fb51d0adc90
parent031767d310d44ec8e1e244ad8e8d0f5564f4a49a
USB: usb_wwan: fix urb leak in write error path

commit db0904737947d509844e171c9863ecc5b4534005 upstream.

When enable usb serial for modem data, sometimes the tty is blocked
in tty_wait_until_sent because portdata->out_busy always is set and
have no chance to be cleared.

We find a bug in write error path. usb_wwan_write set portdata->out_busy
firstly, then try autopm async with error. No out urb submit and no
usb_wwan_outdat_callback to this write, portdata->out_busy can't be
cleared.

This patch clear portdata->out_busy if usb_wwan_write try autopm async
with error.

Fixes: 383cedc3bb43 ("USB: serial: full autosuspend support for the
option driver")

Signed-off-by: xiao jin <jin.xiao@intel.com>
Signed-off-by: Zhang, Qi1 <qi1.zhang@intel.com>
Reviewed-by: David Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/serial/usb_wwan.c