drm/i915: WARN if the core runtime PM get helpers fail
We don't expect the core runtime PM get helpers to return any error, so
add a WARN for this. Also print the return value for all the callsites
to help debugging.
v2:
- Don't call pm_runtime_get_sync() as part of initing locals. (Chris)
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1490693935-12638-1-git-send-email-imre.deak@intel.com
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 012bc35..f8a375f 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -2840,8 +2840,10 @@ void intel_runtime_pm_get(struct drm_i915_private *dev_priv)
{
struct pci_dev *pdev = dev_priv->drm.pdev;
struct device *kdev = &pdev->dev;
+ int ret;
- pm_runtime_get_sync(kdev);
+ ret = pm_runtime_get_sync(kdev);
+ WARN_ONCE(ret < 0, "pm_runtime_get_sync() failed: %d\n", ret);
atomic_inc(&dev_priv->pm.wakeref_count);
assert_rpm_wakelock_held(dev_priv);
@@ -2871,7 +2873,8 @@ bool intel_runtime_pm_get_if_in_use(struct drm_i915_private *dev_priv)
* function, since the power state is undefined. This applies
* atm to the late/early system suspend/resume handlers.
*/
- WARN_ON_ONCE(ret < 0);
+ WARN_ONCE(ret < 0,
+ "pm_runtime_get_if_in_use() failed: %d\n", ret);
if (ret <= 0)
return false;
}
@@ -2955,8 +2958,11 @@ void intel_runtime_pm_enable(struct drm_i915_private *dev_priv)
* platforms without RPM support.
*/
if (!HAS_RUNTIME_PM(dev_priv)) {
+ int ret;
+
pm_runtime_dont_use_autosuspend(kdev);
- pm_runtime_get_sync(kdev);
+ ret = pm_runtime_get_sync(kdev);
+ WARN(ret < 0, "pm_runtime_get_sync() failed: %d\n", ret);
} else {
pm_runtime_use_autosuspend(kdev);
}