From 9d3eb2c33f03432a25a6a3ab3177f839f25cbaf5 Mon Sep 17 00:00:00 2001 From: Chris Wilson <chris@chris-wilson.co.uk> Date: Mon, 15 Oct 2018 12:58:56 +0100 Subject: [PATCH] drm/i915: Hold rpm wakeref for debugfs/i915_drop_caches_set MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 --- drivers/gpu/drm/i915/i915_debugfs.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 7b7f844d325b..5f3c639522fa 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -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; }