diff options
Diffstat (limited to 'drivers/usb/class/cdc-wdm.c')
| -rw-r--r-- | drivers/usb/class/cdc-wdm.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c index a97c018dd419..2b9ff518b509 100644 --- a/drivers/usb/class/cdc-wdm.c +++ b/drivers/usb/class/cdc-wdm.c @@ -542,6 +542,8 @@ static int wdm_open(struct inode *inode, struct file *file) mutex_lock(&desc->lock); if (!desc->count++) { + desc->werr = 0; + desc->rerr = 0; rv = usb_submit_urb(desc->validity, GFP_KERNEL); if (rv < 0) { desc->count--; @@ -853,6 +855,18 @@ static int wdm_pre_reset(struct usb_interface *intf) struct wdm_device *desc = usb_get_intfdata(intf); mutex_lock(&desc->lock); + kill_urbs(desc); + + /* + * we notify everybody using poll of + * an exceptional situation + * must be done before recovery lest a spontaneous + * message from the device is lost + */ + spin_lock_irq(&desc->iuspin); + desc->rerr = -EINTR; + spin_unlock_irq(&desc->iuspin); + wake_up_all(&desc->wait); return 0; } |