]> git.baikalelectronics.ru Git - kernel.git/commit
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, 27 May 2014 22:04:05 +0000 (15:04 -0700)
commit885e6815b69261ec75b2febc52222abd8fee0263
tree903fdf8c6fec1f0fd4a6462c30dea70c9eba40e7
parentbd77988f3c6943a958dde65aaeb22ebb6e384382
USB: usb_wwan: fix urb leak in write error path

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: a2521e4271fe ("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>
Cc: <stable@vger.kernel.org> # v2.6.32
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/serial/usb_wwan.c