diff options
| author | Oliver Neukum <oliver@neukum.org> | 2006-01-08 12:39:13 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-01-31 17:23:37 -0800 |
| commit | 86067eead5a6c6fa413ef5cb59f7129f5ed80292 (patch) | |
| tree | 4861c4ce892c0485beb1810aa346f18833dd9b85 /drivers/usb/class/cdc-acm.c | |
| parent | 8e695cdbffe66f5d3142a363f47053be9f83a90d (diff) | |
[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>
Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index b9fd39fd1b5b..97bdeb1c2181 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1014,8 +1014,13 @@ static void acm_disconnect(struct usb_interface *intf) } down(&open_sem); + if (!usb_get_intfdata(intf)) { + up(&open_sem); + return; + } acm->dev = NULL; - usb_set_intfdata (intf, NULL); + usb_set_intfdata(acm->control, NULL); + usb_set_intfdata(acm->data, NULL); tasklet_disable(&acm->urb_task); @@ -1036,7 +1041,7 @@ static void acm_disconnect(struct usb_interface *intf) for (i = 0; i < ACM_NRB; i++) usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma); - usb_driver_release_interface(&acm_driver, acm->data); + usb_driver_release_interface(&acm_driver, intf == acm->control ? acm->data : intf); if (!acm->used) { acm_tty_unregister(acm); |