diff options
| author | Alexey Khoroshilov <khoroshilov@ispras.ru> | 2013-07-23 20:20:17 (GMT) |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-09-17 15:38:48 (GMT) |
| commit | 2389df458b9e8222ef54fbb6e7023ead84b87a5c (patch) | |
| tree | 7af474c2118894f586b67aebd494fa3d216e844f /drivers/usb | |
| parent | 272b98c6455f00884f0350f775c5342358ebb73f (diff) | |
| download | linux-2389df458b9e8222ef54fbb6e7023ead84b87a5c.tar.xz | |
usb: gadget: mv_u3d_core: fix violation of locking discipline in mv_u3d_ep_disable()
mv_u3d_nuke() expects to be calles with ep->u3d->lock held,
because mv_u3d_done() does. But mv_u3d_ep_disable() calls it
without lock that can lead to unpleasant consequences.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/mv_u3d_core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/gadget/mv_u3d_core.c b/drivers/usb/gadget/mv_u3d_core.c index bbb6e98..561b30e 100644 --- a/drivers/usb/gadget/mv_u3d_core.c +++ b/drivers/usb/gadget/mv_u3d_core.c @@ -645,6 +645,7 @@ static int mv_u3d_ep_disable(struct usb_ep *_ep) struct mv_u3d_ep *ep; struct mv_u3d_ep_context *ep_context; u32 epxcr, direction; + unsigned long flags; if (!_ep) return -EINVAL; @@ -661,7 +662,9 @@ static int mv_u3d_ep_disable(struct usb_ep *_ep) direction = mv_u3d_ep_dir(ep); /* nuke all pending requests (does flush) */ + spin_lock_irqsave(&u3d->lock, flags); mv_u3d_nuke(ep, -ESHUTDOWN); + spin_unlock_irqrestore(&u3d->lock, flags); /* Disable the endpoint for Rx or Tx and reset the endpoint type */ if (direction == MV_U3D_EP_DIR_OUT) { |