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USB: cyberjack: fix disconnect handling 

Make sure the interrupt urb submitted in port_probe is killed in
port_remove.

The interrupt-urb completion handler references the port and may get
called after port_remove has returned and the port has been
unregistered (although this is currently prevented by usb-serial core as
we are using a non-private urb).

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-03-21 12:36:45 +01:00 committed by Greg Kroah-Hartman
parent c3452f5e44
commit 30d9d42e9a
1 changed files with 2 additions and 10 deletions
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12
drivers/usb/serial/cyberjack.c
View File

@ -51,7 +51,6 @@
#define CYBERJACK_PRODUCT_ID 0x0100
/* Function prototypes */
static void cyberjack_disconnect(struct usb_serial *serial);
static int cyberjack_port_probe(struct usb_serial_port *port);
static int cyberjack_port_remove(struct usb_serial_port *port);
static int cyberjack_open(struct tty_struct *tty,
@ -79,7 +78,6 @@ static struct usb_serial_driver cyberjack_device = {
.description = "Reiner SCT Cyberjack USB card reader",
.id_table = id_table,
.num_ports = 1,
.disconnect = cyberjack_disconnect,
.port_probe = cyberjack_port_probe,
.port_remove = cyberjack_port_remove,
.open = cyberjack_open,
@ -130,20 +128,14 @@ static int cyberjack_port_remove(struct usb_serial_port *port)
{
struct cyberjack_private *priv;
usb_kill_urb(port->interrupt_in_urb);
priv = usb_get_serial_port_data(port);
kfree(priv);
return 0;
}
static void cyberjack_disconnect(struct usb_serial *serial)
{
int i;
for (i = 0; i < serial->num_ports; ++i)
usb_kill_urb(serial->port[i]->interrupt_in_urb);
}
static int cyberjack_open(struct tty_struct *tty,
struct usb_serial_port *port)
{