[Bug 95634] [BAT BYT] "HW access outside of RPM atomic section" on driver unload

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95634

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
Oh, fun.

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index f78d4ca..981d279 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3428,6 +3428,9 @@ int i915_gpu_idle(struct drm_device *dev)

        /* Flush everything onto the inactive list. */
        for_each_engine(engine, dev_priv) {
+               if (engine->last_context == NULL)
+                       continue;
+
                if (!i915.enable_execlists) {
                        struct drm_i915_gem_request *req;

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