diff options
| -rw-r--r-- | drivers/usb/core/urb.c | 20 | ||||
| -rw-r--r-- | include/linux/usb.h | 1 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c index b5e9948698b..58bc5e3c256 100644 --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -679,6 +679,26 @@ void usb_poison_anchored_urbs(struct usb_anchor *anchor) EXPORT_SYMBOL_GPL(usb_poison_anchored_urbs); /** + * usb_unpoison_anchored_urbs - let an anchor be used successfully again + * @anchor: anchor the requests are bound to + * + * Reverses the effect of usb_poison_anchored_urbs + * the anchor can be used normally after it returns + */ +void usb_unpoison_anchored_urbs(struct usb_anchor *anchor) +{ + unsigned long flags; + struct urb *lazarus; + + spin_lock_irqsave(&anchor->lock, flags); + list_for_each_entry(lazarus, &anchor->urb_list, anchor_list) { + usb_unpoison_urb(lazarus); + } + anchor->poisoned = 0; + spin_unlock_irqrestore(&anchor->lock, flags); +} +EXPORT_SYMBOL_GPL(usb_unpoison_anchored_urbs); +/** * usb_unlink_anchored_urbs - asynchronously cancel transfer requests en masse * @anchor: anchor the requests are bound to * diff --git a/include/linux/usb.h b/include/linux/usb.h index 4e8654a1825..e8963989650 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -1485,6 +1485,7 @@ extern void usb_poison_urb(struct urb *urb); extern void usb_unpoison_urb(struct urb *urb); extern void usb_kill_anchored_urbs(struct usb_anchor *anchor); extern void usb_poison_anchored_urbs(struct usb_anchor *anchor); +extern void usb_unpoison_anchored_urbs(struct usb_anchor *anchor); extern void usb_unlink_anchored_urbs(struct usb_anchor *anchor); extern void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor); extern void usb_unanchor_urb(struct urb *urb); |