From 86067eead5a6c6fa413ef5cb59f7129f5ed80292 Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Sun, 8 Jan 2006 12:39:13 +0100 Subject: [PATCH] [PATCH] USB: fix oops in acm disconnect this fixes an oops with disconnection in acm. Signed-off-by: Oliver Neukum Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/cdc-acm.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index b9fd39fd1b..97bdeb1c21 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); -- 2.39.5