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path: root/drivers/usb/class/cdc-acm.c
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Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
-rw-r--r--drivers/usb/class/cdc-acm.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index e3861b21e77..e4eca7810bc 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -609,9 +609,9 @@ static int acm_tty_open(struct tty_struct *tty, struct file *filp)
acm->throttle = 0;
- tasklet_schedule(&acm->urb_task);
set_bit(ASYNCB_INITIALIZED, &acm->port.flags);
rv = tty_port_block_til_ready(&acm->port, tty, filp);
+ tasklet_schedule(&acm->urb_task);
done:
mutex_unlock(&acm->mutex);
err_out:
@@ -686,15 +686,21 @@ static void acm_tty_close(struct tty_struct *tty, struct file *filp)
/* Perform the closing process and see if we need to do the hardware
shutdown */
- if (!acm || tty_port_close_start(&acm->port, tty, filp) == 0)
+ if (!acm)
+ return;
+ if (tty_port_close_start(&acm->port, tty, filp) == 0) {
+ mutex_lock(&open_mutex);
+ if (!acm->dev) {
+ tty_port_tty_set(&acm->port, NULL);
+ acm_tty_unregister(acm);
+ tty->driver_data = NULL;
+ }
+ mutex_unlock(&open_mutex);
return;
+ }
acm_port_down(acm, 0);
tty_port_close_end(&acm->port, tty);
- mutex_lock(&open_mutex);
tty_port_tty_set(&acm->port, NULL);
- if (!acm->dev)
- acm_tty_unregister(acm);
- mutex_unlock(&open_mutex);
}
static int acm_tty_write(struct tty_struct *tty,