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drm/i915: Hold rpm wakeref for modifying the global seqno
author
Chris Wilson
<chris@chris-wilson.co.uk>
Tue, 2 Jan 2018 15:12:31 +0000
(15:12 +0000)
committer
Chris Wilson
<chris@chris-wilson.co.uk>
Wed, 3 Jan 2018 11:42:33 +0000
(11:42 +0000)
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@chris-wilson.co.uk>
Reviewed-by: MichaĆ Winiarski <michal.winiarski@intel.com>
Link:
https://patchwork.freedesktop.org/patch/msgid/20180102151235.3949-15-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/i915_debugfs.c
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diff --git
a/drivers/gpu/drm/i915/i915_debugfs.c
b/drivers/gpu/drm/i915/i915_debugfs.c
index
d81cb25
..
2bb6307
100644
(file)
--- 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;