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drm/i915: Hold rpm wakeref for debugfs/i915_drop_caches_set

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Since we peek into HW state and poke around, it behoves us to acquire a
runtime pm wakeref beforehand.

References: https://bugs.freedesktop.org/show_bug.cgi?id=108343
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108364
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181015115856.18590-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-10-15 12:58:56 +01:00
parent 668b6c176c
commit 9d3eb2c33f
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/i915/i915_debugfs.c
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@ -4187,6 +4187,7 @@ i915_drop_caches_set(void *data, u64 val)
DRM_DEBUG("Dropping caches: 0x%08llx [0x%08llx]\n",
val, val & DROP_ALL);
intel_runtime_pm_get(i915);
if (val & DROP_RESET_ACTIVE && !intel_engines_are_idle(i915))
i915_gem_set_wedged(i915);
@ -4204,11 +4205,8 @@ i915_drop_caches_set(void *data, u64 val)
I915_WAIT_LOCKED,
MAX_SCHEDULE_TIMEOUT);
if (ret == 0 && val & DROP_RESET_SEQNO) {
intel_runtime_pm_get(i915);
if (ret == 0 && val & DROP_RESET_SEQNO)
ret = i915_gem_set_global_seqno(&i915->drm, 1);
intel_runtime_pm_put(i915);
}
if (val & DROP_RETIRE)
i915_retire_requests(i915);
@ -4246,6 +4244,8 @@ i915_drop_caches_set(void *data, u64 val)
if (val & DROP_FREED)
i915_gem_drain_freed_objects(i915);
intel_runtime_pm_put(i915);
return ret;
}