Commit 62ad296b authored Jun 25, 2008 by Oliver Neukum Committed by Greg Kroah-Hartman Jul 21, 2008

USB: fix usb serial pm counter decrement for disconnected interfaces



usb serial decrements the pm counter even if an interface has been
disconnected. If it was a logical disconnect the interface may belong
already to another driver. This patch introduces a check for disconnected
interfaces.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Cc: Stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

parent 17d80d56

drivers/usb/serial/usb-serial.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -283,7 +283,10 @@ static void serial_close(struct tty_struct tty, struct file filp)
		}

		if (port->open_count == 0) {
		mutex_lock(&port->serial->disc_mutex);
		if (!port->serial->disconnected)
		usb_autopm_put_interface(port->serial->interface);
		mutex_unlock(&port->serial->disc_mutex);
		module_put(port->serial->type->driver.owner);
		}

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