Hi,

an open() between killing the urb and unregistering the device
can lead to IO to a disconnected device.

	Regards
		Oliver

Signed-off-by: Oliver Neukum <redacted>

--

commit e15f9b41115356ca5399f77bbc6b364c41b7f780
Author: Oliver Neukum [off-list ref]
Date:   Fri Nov 20 21:50:38 2009 +0100

    usbtouchscreen: fix race between open and disconnect
    
    the input device must be unregistered before IO is stopped
    so that open cannot restart IO

diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 68ece58..6850b0d 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c

@@ -1087,8 +1087,8 @@ static void usbtouch_disconnect(struct usb_interface *intf)
 
 	dbg("%s - usbtouch is initialized, cleaning up", __func__);
 	usb_set_intfdata(intf, NULL);
-	usb_kill_urb(usbtouch->irq);
 	input_unregister_device(usbtouch->input);
+	usb_kill_urb(usbtouch->irq);
 	usb_free_urb(usbtouch->irq);
 	usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
 	kfree(usbtouch);

--

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