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[PATCH] USB: fix oops in acm disconnect
this fixes an oops with disconnection in acm. Signed-off-by: Oliver Neukum <oliver@neukum.name> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -1014,8 +1014,13 @@ static void acm_disconnect(struct usb_interface *intf)
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}
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down(&open_sem);
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if (!usb_get_intfdata(intf)) {
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up(&open_sem);
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return;
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}
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acm->dev = NULL;
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usb_set_intfdata (intf, NULL);
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usb_set_intfdata(acm->control, NULL);
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usb_set_intfdata(acm->data, NULL);
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tasklet_disable(&acm->urb_task);
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@ -1036,7 +1041,7 @@ static void acm_disconnect(struct usb_interface *intf)
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for (i = 0; i < ACM_NRB; i++)
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usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma);
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usb_driver_release_interface(&acm_driver, acm->data);
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usb_driver_release_interface(&acm_driver, intf == acm->control ? acm->data : intf);
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if (!acm->used) {
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acm_tty_unregister(acm);
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