drm/i915: Add missing locking to primary plane handlers
intel_primary_plane_{setplane,disable} were lacking struct_mutex locking
around their GEM operations.
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reported-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 34286c6..0029d43 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11400,9 +11400,11 @@
intel_disable_primary_hw_plane(dev_priv, intel_plane->plane,
intel_plane->pipe);
disable_unpin:
+ mutex_lock(&dev->struct_mutex);
i915_gem_track_fb(intel_fb_obj(plane->fb), NULL,
INTEL_FRONTBUFFER_PRIMARY(intel_crtc->pipe));
intel_unpin_fb_obj(intel_fb_obj(plane->fb));
+ mutex_unlock(&dev->struct_mutex);
plane->fb = NULL;
return 0;
@@ -11459,6 +11461,8 @@
* turn on the display with all planes setup as desired.
*/
if (!crtc->enabled) {
+ mutex_lock(&dev->struct_mutex);
+
/*
* If we already called setplane while the crtc was disabled,
* we may have an fb pinned; unpin it.
@@ -11470,7 +11474,10 @@
INTEL_FRONTBUFFER_PRIMARY(intel_crtc->pipe));
/* Pin and return without programming hardware */
- return intel_pin_and_fence_fb_obj(dev, obj, NULL);
+ ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
+ mutex_unlock(&dev->struct_mutex);
+
+ return ret;
}
intel_crtc_wait_for_pending_flips(crtc);
@@ -11482,14 +11489,18 @@
* because plane->fb still gets set and pinned.
*/
if (!visible) {
+ mutex_lock(&dev->struct_mutex);
+
/*
* Try to pin the new fb first so that we can bail out if we
* fail.
*/
if (plane->fb != fb) {
ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
- if (ret)
+ if (ret) {
+ mutex_unlock(&dev->struct_mutex);
return ret;
+ }
}
i915_gem_track_fb(old_obj, obj,
@@ -11505,6 +11516,8 @@
if (plane->fb)
intel_unpin_fb_obj(old_obj);
+ mutex_unlock(&dev->struct_mutex);
+
return 0;
}