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Commit 5b7c1178 authored by Oliver Neukum's avatar Oliver Neukum Committed by Greg Kroah-Hartman
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USB: sierra: error handling in runtime PM 



resumption of devices can fail. Errors must be handled.

Signed-off-by: default avatarOliver Neukum <oneukum@suse.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 9a91aedc

drivers/usb/serial/sierra.c

+12 −4
Original line number Diff line number Diff line
@@ -373,7 +373,10 @@ static int sierra_send_setup(struct usb_serial_port *port) 
	if (!do_send)

		return 0;



	usb_autopm_get_interface(serial->interface);

	retval = usb_autopm_get_interface(serial->interface);

	if (retval < 0)

		return retval;



	retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),

		0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);

	usb_autopm_put_interface(serial->interface);
@@ -808,8 +811,12 @@ static void sierra_close(struct usb_serial_port *port) 
		mutex_lock(&serial->disc_mutex);

		if (!serial->disconnected) {

			serial->interface->needs_remote_wakeup = 0;

			usb_autopm_get_interface(serial->interface);

			/* odd error handling due to pm counters */

			if (!usb_autopm_get_interface(serial->interface))

				sierra_send_setup(port);

			else

				usb_autopm_get_interface_no_resume(serial->interface);

				

		}

		mutex_unlock(&serial->disc_mutex);

		spin_lock_irq(&intfdata->susp_lock);
@@ -862,6 +869,7 @@ static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port) 
		/* get rid of everything as in close */

		sierra_close(port);

		/* restore balance for autopm */

		if (!serial->disconnected)

			usb_autopm_put_interface(serial->interface);

		return err;

	}