From: Johan Hovold Date: Thu, 25 Oct 2012 08:29:00 +0000 (+0200) Subject: USB: metro-usb: fix io after disconnect X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2ee44fbeac92c36e53779a57ee84cfee1affe418;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git USB: metro-usb: fix io after disconnect Make sure no control urb is submitted during close after a disconnect by checking the disconnected flag. Cc: Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c index 25cb97c25ad4..6f29c74eb769 100644 --- a/drivers/usb/serial/metro-usb.c +++ b/drivers/usb/serial/metro-usb.c @@ -179,16 +179,13 @@ static void metrousb_cleanup(struct usb_serial_port *port) { dev_dbg(&port->dev, "%s\n", __func__); - if (port->serial->dev) { - /* Shutdown any interrupt in urbs. */ - if (port->interrupt_in_urb) { - usb_unlink_urb(port->interrupt_in_urb); - usb_kill_urb(port->interrupt_in_urb); - } - - /* Send deactivate cmd to device */ + usb_unlink_urb(port->interrupt_in_urb); + usb_kill_urb(port->interrupt_in_urb); + + mutex_lock(&port->serial->disc_mutex); + if (!port->serial->disconnected) metrousb_send_unidirectional_cmd(UNI_CMD_CLOSE, port); - } + mutex_unlock(&port->serial->disc_mutex); } static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)