Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 8fdbeb26 authored by Oliver Neukum's avatar Oliver Neukum Committed by Greg Kroah-Hartman
Browse files

cdc-acm: fix power management in ioctl 



An ioctl that does depends on communication with a device should
prevent suspension of teh device.

Signed-off-by: default avatarOliver Neukum <oneukum@suse.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 797ef137

drivers/usb/class/cdc-acm.c

+6 −0
Original line number Diff line number Diff line
@@ -888,7 +888,13 @@ static int acm_tty_ioctl(struct tty_struct *tty, 
		rv = set_serial_info(acm, (struct serial_struct __user *) arg);

		break;

	case TIOCMIWAIT:

		rv = usb_autopm_get_interface(acm->control);

		if (rv < 0) {

			rv = -EIO;

			break;

		}

		rv = wait_serial_change(acm, arg);

		usb_autopm_put_interface(acm->control);

		break;

	case TIOCGICOUNT:

		rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);