USB: usb_wwan: fix urb leak at shutdown
authorJohan Hovold <jhovold@gmail.com>
Mon, 26 May 2014 17:23:16 +0000 (19:23 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 27 May 2014 22:04:06 +0000 (15:04 -0700)
commit79eed03e77d481b55d85d1cfe5a1636a0d3897fd
tree412cc2dd0d0f05f6dbdabfff9aa333d8926c7ebf
parent170fad9e22df0063eba0701adb966786d7a4ec5a
USB: usb_wwan: fix urb leak at shutdown

The delayed-write queue was never emptied at shutdown (close), something
which could lead to leaked urbs if the port is closed before being
runtime resumed due to a write.

When this happens the output buffer would not drain on close
(closing_wait timeout), and after consecutive opens, writes could be
corrupted with previously buffered data, transfered with reduced
throughput or completely blocked.

Note that unbusy_queued_urb() was simply moved out of CONFIG_PM.

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

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