Merge "drivers: edac: Defer work for the polling EDAC driver"

drivers/edac/Kconfig

@@ -23,6 +23,15 @@ menuconfig EDAC
 
 if EDAC
 
+config EDAC_QGKI
+	bool "Enable QGKI features for EDAC"
+	depends on QGKI
+	help
+	  When QGKI variants are selected, use special EDAC features like
+	  creating and using deferred work. This feature adds
+	  a deferrable timer if the error checking is not worth waking up
+	  the cpu from idle.
+
 config EDAC_LEGACY_SYSFS
 	bool "EDAC legacy sysfs"
 	default y

drivers/edac/edac_device.c

@@ -388,9 +388,15 @@ static void edac_device_workq_setup(struct edac_device_ctl_info *edac_dev,
 	 */
 	edac_dev->poll_msec = msec;
 	edac_dev->delay = msecs_to_jiffies(msec);
-
+#ifdef CONFIG_EDAC_QGKI
+	if (edac_dev->defer_work)
+		INIT_DEFERRABLE_WORK(&edac_dev->work,
+					edac_device_workq_function);
+	else
+		INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function);
+#else
 	INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function);
-
+#endif
 	/* optimize here for the 1 second case, which will be normal value, to
 	 * fire ON the 1 second time event. This helps reduce all sorts of
 	 * timers firing on sub-second basis, while they are happy

drivers/edac/edac_device.h

@@ -165,6 +165,9 @@ struct edac_device_ctl_info {
 	int panic_on_ue;	/* boolean for panic'ing on an UE */
 	unsigned poll_msec;	/* number of milliseconds to poll interval */
 	unsigned long delay;	/* number of jiffies for poll_msec */
+#ifdef CONFIG_EDAC_QGKI
+	bool defer_work;	/* Create a deferrable work for polling */
+#endif
 
 	/* Additional top controller level attributes, but specified
 	 * by the low level driver.

drivers/edac/qcom_edac.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
  */
 
 #include <linux/edac.h>
@@ -383,6 +383,9 @@ static int qcom_llcc_edac_probe(struct platform_device *pdev)
 		dev_info(dev, "No ECC IRQ; defaulting to polling mode\n");
 		edev_ctl->poll_msec = poll_msec;
 		edev_ctl->edac_check = qcom_llcc_poll_cache_errors;
+#ifdef CONFIG_EDAC_QGKI
+		edev_ctl->defer_work = 1;
+#endif
 	}
 
 	rc = edac_device_add_device(edev_ctl);