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drm/i915: Hold rpm wakeref for modifying the global seqno 

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: Michał Winiarski <michal.winiarski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180102151235.3949-15-chris@chris-wilson.co.uk
hifive-unleashed-5.1
Chris Wilson 2018-01-02 15:12:31 +00:00
parent f3c9d40757
commit 65c475c6dd
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_debugfs.c
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@ -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;