drm/i915/opregion: Cleanup opregion after errors during driver loading

Clean up the opregion state if something fails after
intel_opregion_setup() is called.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230308162503.3219200-2-imre.deak@intel.com

drivers/gpu/drm/i915/display/intel_opregion.c

@@ -1237,6 +1237,14 @@ void intel_opregion_unregister(struct drm_i915_private *i915)
 		unregister_acpi_notifier(&opregion->acpi_notifier);
 		opregion->acpi_notifier.notifier_call = NULL;
 	}
+}
+
+void intel_opregion_cleanup(struct drm_i915_private *i915)
+{
+	struct intel_opregion *opregion = &i915->display.opregion;
+
+	if (!opregion->header)
+		return;
 
 	/* just clear all opregion memory pointers now */
 	memunmap(opregion->header);

drivers/gpu/drm/i915/display/intel_opregion.h

@@ -60,6 +60,7 @@ struct intel_opregion {
 #ifdef CONFIG_ACPI
 
 int intel_opregion_setup(struct drm_i915_private *dev_priv);
+void intel_opregion_cleanup(struct drm_i915_private *i915);
 
 void intel_opregion_register(struct drm_i915_private *dev_priv);
 void intel_opregion_unregister(struct drm_i915_private *dev_priv);

drivers/gpu/drm/i915/i915_driver.c

@@ -531,7 +531,7 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
 
 	ret = i915_pcode_init(dev_priv);
 	if (ret)
-		goto err_msi;
+		goto err_opregion;
 
 	/*
 	 * Fill the dram structure to get the system dram info. This will be
@@ -552,6 +552,8 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
 
 	return 0;
 
+err_opregion:
+	intel_opregion_cleanup(dev_priv);
 err_msi:
 	if (pdev->msi_enabled)
 		pci_disable_msi(pdev);
@@ -577,6 +579,8 @@ static void i915_driver_hw_remove(struct drm_i915_private *dev_priv)
 
 	i915_perf_fini(dev_priv);
 
+	intel_opregion_cleanup(dev_priv);
+
 	if (pdev->msi_enabled)
 		pci_disable_msi(pdev);