This is a note to let you know that I've just added the patch titled USB: serial: metro-usb: stop I/O after failed open to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-testing branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will be merged to the usb-next branch sometime soon, after it passes testing, and the merge window is open. If you have any questions about this process, please let me know. >From 2339536d229df25c71c0900fc619289229bfecf6 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan@xxxxxxxxxx> Date: Thu, 12 Oct 2017 10:54:21 +0200 Subject: USB: serial: metro-usb: stop I/O after failed open 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. Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Fixes: 704577861d5e ("USB: serial: metro-usb: get data from device in Uni-Directional mode.") Cc: stable <stable@xxxxxxxxxxxxxxx> # 3.5 Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> --- 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; } -- 2.15.0