[Bug 92335] [HSW Regression] Null pointer deference in intel_mmio_flip_work_func

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92335

--- Comment #11 from Chris Wilson <chris at chris-wilson.co.uk> ---
Ok, run with

diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 71d7298648e0..850b11351c03 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11400,7 +11400,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
                 * the hardware completed the operation behind our backs.
                 */
                if (__intel_pageflip_stall_check(dev, crtc)) {
-                       DRM_DEBUG_DRIVER("flip queue: previous flip completed,
continuing\n");
+                       DRM_ERROR("flip queue: previous flip completed,
continuing\n");
                        page_flip_completed(intel_crtc);
                } else {
                        DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");

and lets see if that crops up just before the fatal oops.

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