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path: root/drivers/usb/class
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-rw-r--r--drivers/usb/class/cdc-acm.c31
1 files changed, 16 insertions, 15 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 69e859e0f51..adff5a77e31 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;
}