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Code Issues Releases Wiki Activity

USB: fix bug in usb_unlink_anchored_urbs()

Browse source 
Irqs must not accidentally be reenabled.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Oliver Neukum 2008-08-18 16:36:52 +02:00 committed by Greg Kroah-Hartman
parent f8033827d8
commit 77571f05a4
1 changed files with 7 additions and 2 deletions
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9
drivers/usb/core/urb.c
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@ -601,15 +601,20 @@ EXPORT_SYMBOL_GPL(usb_kill_anchored_urbs);
void usb_unlink_anchored_urbs(struct usb_anchor *anchor)
{
struct urb *victim;
unsigned long flags;
spin_lock_irq(&anchor->lock);
spin_lock_irqsave(&anchor->lock, flags);
while (!list_empty(&anchor->urb_list)) {
victim = list_entry(anchor->urb_list.prev, struct urb,
anchor_list);
usb_get_urb(victim);
spin_unlock_irqrestore(&anchor->lock, flags);
/* this will unanchor the URB */
usb_unlink_urb(victim);
usb_put_urb(victim);
spin_lock_irqsave(&anchor->lock, flags);
}
spin_unlock_irq(&anchor->lock);
spin_unlock_irqrestore(&anchor->lock, flags);
}
EXPORT_SYMBOL_GPL(usb_unlink_anchored_urbs);