Commit ed797074 authored May 26, 2014 by Johan Hovold Committed by Greg Kroah-Hartman May 27, 2014

USB: cdc-acm: fix shutdown and suspend race



We should stop I/O unconditionally at suspend rather than rely on the
tty-port initialised flag (which is set prior to stopping I/O during
shutdown) in order to prevent suspend returning with URBs still active.

Fixes: 11ea859d ("USB: additional power savings for cdc-acm devices
that support remote wakeup")

Cc: <stable@vger.kernel.org>	# v2.6.27
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent bae3f4c5

drivers/usb/class/cdc-acm.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -1550,7 +1550,6 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message)
		if (cnt)
		return 0;

		if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
		stop_data_traffic(acm);

		return 0;