tree ca4e6b7ccdc5514bc1dd0899bd2f768e6bd39472
parent 9026d165a2c4e72225ddb3ee1076eef76e034020
author Florian Wolter <wolly84@web.de> 1376469196 +0200
committer Matthias Kaehlcke <mka@google.com> 1433366106 -0700

xhci: Fix race between ep halt and URB cancellation

commit 526867c3ca0caa2e3e846cb993b0f961c33c2abb upstream.

The halted state of a endpoint cannot be cleared over CLEAR_HALT from a
user process, because the stopped_td variable was overwritten in the
handle_stopped_endpoint() function. So the xhci_endpoint_reset() function will
refuse the reset and communication with device can not run over this endpoint.
https://bugzilla.kernel.org/show_bug.cgi?id=60699

Signed-off-by: Florian Wolter <wolly84@web.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>