[Intel-gfx] [PATCH] drm/i915: Hold rpm wakeref for modifying the global seqno

[Chris Wilson]

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 <chris at 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 e968aeae1d84..81a6749d297a 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