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authorAlan Stern <stern@rowland.harvard.edu>2009-06-02 11:53:55 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2009-06-15 21:44:47 -0700
commitf9c99bb8b3a1ec81af68d484a551307326c2e933 (patch)
tree9031ebe390ecd558d54ad484dde5ba66dcf823b7 /drivers/usb/serial/kl5kusb105.c
parentc706ebdfc8955b850e477255a8c0f93f9f14712d (diff)
USB: usb-serial: replace shutdown with disconnect, release
This patch (as1254) splits up the shutdown method of usb_serial_driver into a disconnect and a release method. The problem is that the usb-serial core was calling shutdown during disconnect handling, but drivers didn't expect it to be called until after all the open file references had been closed. The result was an oops when the close method tried to use memory that had been deallocated by shutdown. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial/kl5kusb105.c')
-rw-r--r--drivers/usb/serial/kl5kusb105.c39
1 files changed, 22 insertions, 17 deletions
diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c
index fa817c66b3e8..0f44bb8e8d4f 100644
--- a/drivers/usb/serial/kl5kusb105.c
+++ b/drivers/usb/serial/kl5kusb105.c
@@ -73,7 +73,8 @@ static int debug;
* Function prototypes
*/
static int klsi_105_startup(struct usb_serial *serial);
-static void klsi_105_shutdown(struct usb_serial *serial);
+static void klsi_105_disconnect(struct usb_serial *serial);
+static void klsi_105_release(struct usb_serial *serial);
static int klsi_105_open(struct tty_struct *tty,
struct usb_serial_port *port, struct file *filp);
static void klsi_105_close(struct usb_serial_port *port);
@@ -131,7 +132,8 @@ static struct usb_serial_driver kl5kusb105d_device = {
.tiocmget = klsi_105_tiocmget,
.tiocmset = klsi_105_tiocmset,
.attach = klsi_105_startup,
- .shutdown = klsi_105_shutdown,
+ .disconnect = klsi_105_disconnect,
+ .release = klsi_105_release,
.throttle = klsi_105_throttle,
.unthrottle = klsi_105_unthrottle,
};
@@ -315,7 +317,7 @@ err_cleanup:
} /* klsi_105_startup */
-static void klsi_105_shutdown(struct usb_serial *serial)
+static void klsi_105_disconnect(struct usb_serial *serial)
{
int i;
@@ -325,33 +327,36 @@ static void klsi_105_shutdown(struct usb_serial *serial)
for (i = 0; i < serial->num_ports; ++i) {
struct klsi_105_private *priv =
usb_get_serial_port_data(serial->port[i]);
- unsigned long flags;
if (priv) {
/* kill our write urb pool */
int j;
struct urb **write_urbs = priv->write_urb_pool;
- spin_lock_irqsave(&priv->lock, flags);
for (j = 0; j < NUM_URBS; j++) {
if (write_urbs[j]) {
- /* FIXME - uncomment the following
- * usb_kill_urb call when the host
- * controllers get fixed to set
- * urb->dev = NULL after the urb is
- * finished. Otherwise this call
- * oopses. */
- /* usb_kill_urb(write_urbs[j]); */
- kfree(write_urbs[j]->transfer_buffer);
+ usb_kill_urb(write_urbs[j]);
usb_free_urb(write_urbs[j]);
}
}
- spin_unlock_irqrestore(&priv->lock, flags);
- kfree(priv);
- usb_set_serial_port_data(serial->port[i], NULL);
}
}
-} /* klsi_105_shutdown */
+} /* klsi_105_disconnect */
+
+
+static void klsi_105_release(struct usb_serial *serial)
+{
+ int i;
+
+ dbg("%s", __func__);
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ struct klsi_105_private *priv =
+ usb_get_serial_port_data(serial->port[i]);
+
+ kfree(priv);
+ }
+} /* klsi_105_release */
static int klsi_105_open(struct tty_struct *tty,
struct usb_serial_port *port, struct file *filp)