drm/i915/guc: Track the rpm wakeref

Keep track of our acquired wakeref for interacting with the guc, so that
we can cancel it upon release and so clearly identify leaks.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190114142129.24398-9-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/intel_guc_log.c b/drivers/gpu/drm/i915/intel_guc_log.c
index 1b1581a..20c0b36 100644 (file)
--- a/drivers/gpu/drm/i915/intel_guc_log.c
+++ b/drivers/gpu/drm/i915/intel_guc_log.c
@@ -436,6 +436,7 @@ static void guc_log_capture_logs(struct intel_guc_log *log)
 {
        struct intel_guc *guc = log_to_guc(log);
        struct drm_i915_private *dev_priv = guc_to_i915(guc);
+       intel_wakeref_t wakeref;
 
        guc_read_update_log_buffer(log);
 
@@ -443,9 +444,9 @@ static void guc_log_capture_logs(struct intel_guc_log *log)
         * Generally device is expected to be active only at this
         * time, so get/put should be really quick.
         */
-       intel_runtime_pm_get(dev_priv);
+       wakeref = intel_runtime_pm_get(dev_priv);
        guc_action_flush_log_complete(guc);
-       intel_runtime_pm_put_unchecked(dev_priv);
+       intel_runtime_pm_put(dev_priv, wakeref);
 }
 
 int intel_guc_log_create(struct intel_guc_log *log)
@@ -505,6 +506,7 @@ int intel_guc_log_set_level(struct intel_guc_log *log, u32 level)
 {
        struct intel_guc *guc = log_to_guc(log);
        struct drm_i915_private *dev_priv = guc_to_i915(guc);
+       intel_wakeref_t wakeref;
        int ret;
 
        BUILD_BUG_ON(GUC_LOG_VERBOSITY_MIN != 0);
@@ -524,11 +526,11 @@ int intel_guc_log_set_level(struct intel_guc_log *log, u32 level)
                goto out_unlock;
        }
 
-       intel_runtime_pm_get(dev_priv);
+       wakeref = intel_runtime_pm_get(dev_priv);
        ret = guc_action_control_log(guc, GUC_LOG_LEVEL_IS_VERBOSE(level),
                                     GUC_LOG_LEVEL_IS_ENABLED(level),
                                     GUC_LOG_LEVEL_TO_VERBOSITY(level));
-       intel_runtime_pm_put_unchecked(dev_priv);
+       intel_runtime_pm_put(dev_priv, wakeref);
        if (ret) {
                DRM_DEBUG_DRIVER("guc_log_control action failed %d\n", ret);
                goto out_unlock;
@@ -601,6 +603,7 @@ void intel_guc_log_relay_flush(struct intel_guc_log *log)
 {
        struct intel_guc *guc = log_to_guc(log);
        struct drm_i915_private *i915 = guc_to_i915(guc);
+       intel_wakeref_t wakeref;
 
        /*
         * Before initiating the forceful flush, wait for any pending/ongoing
@@ -608,9 +611,9 @@ void intel_guc_log_relay_flush(struct intel_guc_log *log)
         */
        flush_work(&log->relay.flush_work);
 
-       intel_runtime_pm_get(i915);
+       wakeref = intel_runtime_pm_get(i915);
        guc_action_flush_log(guc);
-       intel_runtime_pm_put_unchecked(i915);
+       intel_runtime_pm_put(i915, wakeref);
 
        /* GuC would have updated log buffer by now, so capture it */
        guc_log_capture_logs(log);

diff --git a/drivers/gpu/drm/i915/intel_huc.c b/drivers/gpu/drm/i915/intel_huc.c
index c2b076e..3e8c18b 100644 (file)
--- a/drivers/gpu/drm/i915/intel_huc.c
+++ b/drivers/gpu/drm/i915/intel_huc.c
@@ -115,14 +115,15 @@ fail:
 int intel_huc_check_status(struct intel_huc *huc)
 {
        struct drm_i915_private *dev_priv = huc_to_i915(huc);
+       intel_wakeref_t wakeref;
        bool status;
 
        if (!HAS_HUC(dev_priv))
                return -ENODEV;
 
-       intel_runtime_pm_get(dev_priv);
+       wakeref = intel_runtime_pm_get(dev_priv);
        status = I915_READ(HUC_STATUS2) & HUC_FW_VERIFIED;
-       intel_runtime_pm_put_unchecked(dev_priv);
+       intel_runtime_pm_put(dev_priv, wakeref);
 
        return status;
 }