drm/i915: Add missing mutex_lock(&dev->struct_mutex)

there might be a nicer way to fix this but this is the simplest for now.

Signed-off-by: Pierre Willenbrock <pierre@pirsoft.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4d2baf7..65b635c 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1008,6 +1008,7 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
                temp = CURSOR_MODE_DISABLE;
                addr = 0;
                bo = NULL;
+               mutex_lock(&dev->struct_mutex);
                goto finish;
        }