Make sure to kill the interrupt-in URB after a failed open request. Apart from saving power (and avoiding stale input after a later successful open), this also prevents a NULL-deref in the completion handler if the port is manually unbound.
Signed-off-by: Johan Hovold <[email protected]> --- drivers/usb/serial/metro-usb.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c index cc84da8dbb84..4bb29e03dae4 100644 --- a/drivers/usb/serial/metro-usb.c +++ b/drivers/usb/serial/metro-usb.c @@ -188,7 +188,7 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port) dev_err(&port->dev, "%s - failed submitting interrupt in urb, error code=%d\n", __func__, result); - goto exit; + return result; } /* Send activate cmd to device */ @@ -197,9 +197,14 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port) dev_err(&port->dev, "%s - failed to configure device, error code=%d\n", __func__, result); - goto exit; + goto err_kill_urb; } -exit: + + return 0; + +err_kill_urb: + usb_kill_urb(port->interrupt_in_urb); + return result; } -- 2.14.2 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
