From: Johan Hovold Date: Mon, 26 May 2014 17:23:44 +0000 (+0200) Subject: USB: cdc-acm: fix I/O after failed open X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e4c36076c2a6195ec62c35b03c3fde84d0087dc8;p=openwrt%2Fstaging%2Fblogic.git USB: cdc-acm: fix I/O after failed open Make sure to kill any already submitted read urbs on read-urb submission failures in open in order to prevent doing I/O for a closed port. Fixes: 088c64f81284 ("USB: cdc-acm: re-write read processing") Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 6c6928a154bd..eddeba61a88c 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -506,6 +506,7 @@ static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) { struct acm *acm = container_of(port, struct acm, port); int retval = -ENODEV; + int i; dev_dbg(&acm->control->dev, "%s\n", __func__); @@ -556,6 +557,8 @@ static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) return 0; error_submit_read_urbs: + for (i = 0; i < acm->rx_buflimit; i++) + usb_kill_urb(acm->read_urbs[i]); acm->ctrlout = 0; acm_set_control(acm, acm->ctrlout); error_set_control: