Provide some serialisation between user operations by waiting for the
reset initiated by setting i915_wedged to complete.
The automatic wait here makes
echo 1 > i915_wedged; cat i915_error_state
do the right thing, and not risk reporting "No error collected".
Signed-off-by: Chris Wilson <[email protected]>
Cc: Tvrtko Ursulin <[email protected]>
Cc: Mika Kuoppala <[email protected]>
Reviewed-by: Mika Kuoppala <[email protected]>
---
drivers/gpu/drm/i915/i915_debugfs.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
b/drivers/gpu/drm/i915/i915_debugfs.c
index d62cf2e51d12..aea51fb38510 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4135,6 +4135,10 @@ i915_wedged_set(void *data, u64 val)
i915_handle_error(dev_priv, val,
"Manually setting wedged to %llu", val);
+ wait_on_bit(&dev_priv->gpu_error.flags,
+ I915_RESET_HANDOFF,
+ TASK_UNINTERRUPTIBLE);
+
return 0;
}
--
2.11.0
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