drm/i915: drop the struct_mutex when wedged or trying to reset

We grab the struct_mutex in intel_crtc_page_flip, but if we are wedged
or a reset is in progress we bail early but never seem to actually
release the lock.

Fixes: 7f1847ebf48b ("drm/i915: Simplify checking of GPU reset_counter in display pageflips")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161128103648.9235-1-matthew.auld@intel.com
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: <stable@vger.kernel.org> # v4.7+
(cherry picked from commit ddbb271aea87fc6004d3c8bcdb0710e980c7ec85)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
(cherry picked from commit e411072d5740a49cdc9d0713798c30440757e451)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/astraceroute/Makefile b/astraceroute/Makefile
index 82e5b5b..8add1cd 100644
--- a/astraceroute/Makefile
+++ b/astraceroute/Makefile
@@ -9,6 +9,7 @@ astraceroute-objs =	xmalloc.o \
 			tprintf.o \
 			bpf.o \
 			str.o \
+			dev.o \
 			geoip.o \
 			ring_rx.o \
 			ring.o \