To modify the global seqno may require rewriting a few registers, which
requires us to hold the rpm wakeref. We must therefore take it around
the call to i915_gem_set_global_seqno() in debugfs, on behalf of the
user.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_debugfs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
b/drivers/gpu/drm/i915/i915_debugfs.c
index d81cb2513069..2bb63073d73f 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -988,7 +988,10 @@ i915_next_seqno_set(void *data, u64 val)
if (ret)
return ret;
+ intel_runtime_pm_get(dev_priv);
ret = i915_gem_set_global_seqno(dev, val);
+ intel_runtime_pm_put(dev_priv);
+
mutex_unlock(&dev->struct_mutex);
return ret;
--
2.15.1
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