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authorJohan Hovold <jhovold@gmail.com>2012-10-25 10:29:00 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-10-25 09:36:57 -0700
commit2ee44fbeac92c36e53779a57ee84cfee1affe418 (patch)
tree2af799d3fe59dc19fc994e65f71a7d4d505c9ada /drivers/usb
parent50dde8686eec41bf3d7cbec7a6f76c073ab01903 (diff)
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: <stable@vger.kernel.org> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/serial/metro-usb.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c
index 25cb97c25ad..6f29c74eb76 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)