diff options
Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 69e859e0f51d..adff5a77e31f 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -422,6 +422,17 @@ bail_out: return -EIO; } +static void acm_tty_unregister(struct acm *acm) +{ + tty_unregister_device(acm_tty_driver, acm->minor); + usb_put_intf(acm->control); + acm_table[acm->minor] = NULL; + usb_free_urb(acm->ctrlurb); + usb_free_urb(acm->readurb); + usb_free_urb(acm->writeurb); + kfree(acm); +} + static void acm_tty_close(struct tty_struct *tty, struct file *filp) { struct acm *acm = tty->driver_data; @@ -436,14 +447,8 @@ static void acm_tty_close(struct tty_struct *tty, struct file *filp) usb_kill_urb(acm->ctrlurb); usb_kill_urb(acm->writeurb); usb_kill_urb(acm->readurb); - } else { - tty_unregister_device(acm_tty_driver, acm->minor); - acm_table[acm->minor] = NULL; - usb_free_urb(acm->ctrlurb); - usb_free_urb(acm->readurb); - usb_free_urb(acm->writeurb); - kfree(acm); - } + } else + acm_tty_unregister(acm); } up(&open_sem); } @@ -905,7 +910,8 @@ skip_normal_probe: usb_driver_claim_interface(&acm_driver, data_interface, acm); - tty_register_device(acm_tty_driver, minor, &intf->dev); + usb_get_intf(control_interface); + tty_register_device(acm_tty_driver, minor, &control_interface->dev); acm_table[minor] = acm; usb_set_intfdata (intf, acm); @@ -954,12 +960,7 @@ static void acm_disconnect(struct usb_interface *intf) usb_driver_release_interface(&acm_driver, acm->data); if (!acm->used) { - tty_unregister_device(acm_tty_driver, acm->minor); - acm_table[acm->minor] = NULL; - usb_free_urb(acm->ctrlurb); - usb_free_urb(acm->readurb); - usb_free_urb(acm->writeurb); - kfree(acm); + acm_tty_unregister(acm); up(&open_sem); return; } |