diff options
| author | Oliver Neukum <oliver@neukum.org> | 2008-08-18 18:36:52 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-08-21 21:26:32 +0400 |
| commit | 77571f05a483c0259e42ba2f482c82debc9a63af (patch) | |
| tree | db4624d3c0fba8d3ab94df32ebbc7d8578ca4266 | |
| parent | f8033827d8e92db6159d34ed45c608522674ecd8 (diff) | |
| download | linux-77571f05a483c0259e42ba2f482c82debc9a63af.tar.xz | |
USB: fix bug in usb_unlink_anchored_urbs()
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>
| -rw-r--r-- | drivers/usb/core/urb.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c index c0b1ae25ae2a..47111e88f791 100644 --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -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); |