[PATCH v3] drm/i915: Skip error capture when wedged on init

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Trying to capture uninitialised engines when we wedged on init ends in
tears. Skip that together with uC capture, since failure to initialise the
latter can actually be one of the reasons for wedging on init.

v2:
 * Use i915_disable_error_state when wedging on init/fini.

v3:
 * Handle mock tests.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Reviewed-by: Matthew Auld <matthew.auld at intel.com> # v1
---
 drivers/gpu/drm/i915/gt/intel_reset.c            | 2 ++
 drivers/gpu/drm/i915/selftests/mock_gem_device.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_reset.c b/drivers/gpu/drm/i915/gt/intel_reset.c
index 51b56b8e5003..0fbd6dbadce7 100644
--- a/drivers/gpu/drm/i915/gt/intel_reset.c
+++ b/drivers/gpu/drm/i915/gt/intel_reset.c
@@ -1448,6 +1448,7 @@ void intel_gt_set_wedged_on_init(struct intel_gt *gt)
 	BUILD_BUG_ON(I915_RESET_ENGINE + I915_NUM_ENGINES >
 		     I915_WEDGED_ON_INIT);
 	intel_gt_set_wedged(gt);
+	i915_disable_error_state(gt->i915, -ENODEV);
 	set_bit(I915_WEDGED_ON_INIT, &gt->reset.flags);
 
 	/* Wedged on init is non-recoverable */
@@ -1457,6 +1458,7 @@ void intel_gt_set_wedged_on_init(struct intel_gt *gt)
 void intel_gt_set_wedged_on_fini(struct intel_gt *gt)
 {
 	intel_gt_set_wedged(gt);
+	i915_disable_error_state(gt->i915, -ENODEV);
 	set_bit(I915_WEDGED_ON_FINI, &gt->reset.flags);
 	intel_gt_retire_requests(gt); /* cleanup any wedged requests */
 }
diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
index 9ab3f284d1dd..d0e2e61de8d4 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
@@ -177,6 +177,8 @@ struct drm_i915_private *mock_gem_device(void)
 
 	mock_uncore_init(&i915->uncore, i915);
 
+	spin_lock_init(&i915->gpu_error.lock);
+
 	i915_gem_init__mm(i915);
 	intel_gt_init_early(&i915->gt, i915);
 	atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */
-- 
2.30.2