Merge tag 'platform-drivers-x86-v4.18-1' of git://git.infradead.org/linux-platform-drivers-x86

Pull x86 platform driver updates from Darren Hart:
 "Several incremental improvements including new keycodes, new models,
  new quirks, and related documentation. Adds LED platform driver
  activation for Mellanox systems. Some minor optimizations and
  cleanups. Includes several bug fixes, message silencing, mostly minor

  Automated summary:

  acer-wmi:
   -  add another KEY_POWER keycode

  apple-gmux:
   -  fix gmux_get_client_id()'s return type

  asus-laptop:
   -  Simplify getting .drvdata

  asus-wireless:
   -  Fix format specifier

  dell-laptop:
   -  Fix keyboard backlight timeout on XPS 13 9370

  dell-smbios:
   -  Match on www.dell.com in OEM strings too

  dell-wmi:
   -  Ignore new rfkill and fn-lock events
   -  Set correct keycode for Fn + left arrow

  fujitsu-laptop:
   -  Simplify soft key handling

  ideapad-laptop:
   -  Add E42-80 to no_hw_rfkill
   -  Add fn-lock setting
   -  Add MIIX 720-12IKB to no_hw_rfkill

  lib/string_helpers:
   -  Add missed declaration of struct task_struct

  intel_scu_ipc:
   -  Replace mdelay with usleep_range in intel_scu_ipc_i2c_cntrl

  mlx-platform:
   -  Add LED platform driver activation

  platform/mellanox:
   -  Add new ODM system types to mlx-platform
   -  mlxreg-hotplug: add extra cycle for hotplug work queue
   -  mlxreg-hotplug: Document fixes for hotplug private data

  platform_data/mlxreg:
   -  Document fixes for hotplug device

  silead_dmi:
   -  Add entry for Chuwi Hi8 tablet touchscreen
   -  Add touchscreen info for the Onda V891w tablet
   -  Add info for the PoV mobii TAB-P800W (v2.0)
   -  Add touchscreen info for the Jumper EZpad 6 Pro

  thinkpad_acpi:
   -  silence false-positive-prone pr_warn
   -  do not report thermal sensor state for tablet mode switch
   -  silence HKEY 0x6032, 0x60f0, 0x6030"

* tag 'platform-drivers-x86-v4.18-1' of git://git.infradead.org/linux-platform-drivers-x86: (30 commits)
  platform/x86: silead_dmi: Add entry for Chuwi Hi8 tablet touchscreen
  platform/x86: dell-laptop: Fix keyboard backlight timeout on XPS 13 9370
  platform/x86: dell-wmi: Ignore new rfkill and fn-lock events
  platform/x86: mlx-platform: Add LED platform driver activation
  platform/mellanox: Add new ODM system types to mlx-platform
  platform/mellanox: mlxreg-hotplug: add extra cycle for hotplug work queue
  platform/x86: ideapad-laptop: Add E42-80 to no_hw_rfkill
  platform/x86: silead_dmi: Add touchscreen info for the Onda V891w tablet
  platform/x86: silead_dmi: Add info for the PoV mobii TAB-P800W (v2.0)
  platform/x86: silead_dmi: Add touchscreen info for the Jumper EZpad 6 Pro
  platform/x86: asus-wireless: Fix format specifier
  platform/x86: asus-wmi: Fix NULL pointer dereference
  platform/x86: dell-wmi: Set correct keycode for Fn + left arrow
  platform/x86: acer-wmi: add another KEY_POWER keycode
  platform/x86: ideapad-laptop: Add fn-lock setting
  platform/x86: ideapad-laptop: Add MIIX 720-12IKB to no_hw_rfkill
  lib/string_helpers: Add missed declaration of struct task_struct
  platform/x86: DELL_WMI use depends on instead of select for DELL_SMBIOS
  platform/mellanox: mlxreg-hotplug: Document fixes for hotplug private data
  platform_data/mlxreg: Document fixes for hotplug device
  ...

drivers/platform/mellanox/mlxreg-hotplug.c

@@ -55,13 +55,16 @@
 #define MLXREG_HOTPLUG_RST_CNTR		3
 
 #define MLXREG_HOTPLUG_ATTRS_MAX	24
+#define MLXREG_HOTPLUG_NOT_ASSERT	3
 
 /**
  * struct mlxreg_hotplug_priv_data - platform private data:
  * @irq: platform device interrupt number;
+ * @dev: basic device;
  * @pdev: platform device;
  * @plat: platform data;
- * @dwork: delayed work template;
+ * @regmap: register map handle;
+ * @dwork_irq: delayed work template;
  * @lock: spin lock;
  * @hwmon: hwmon device;
  * @mlxreg_hotplug_attr: sysfs attributes array;
@@ -71,6 +74,8 @@
  * @cell: location of top aggregation interrupt register;
  * @mask: top aggregation interrupt common mask;
  * @aggr_cache: last value of aggregation register status;
+ * @after_probe: flag indication probing completion;
+ * @not_asserted: number of entries in workqueue with no signal assertion;
  */
 struct mlxreg_hotplug_priv_data {
 	int irq;
@@ -79,7 +84,6 @@ struct mlxreg_hotplug_priv_data {
 	struct mlxreg_hotplug_platform_data *plat;
 	struct regmap *regmap;
 	struct delayed_work dwork_irq;
-	struct delayed_work dwork;
 	spinlock_t lock; /* sync with interrupt */
 	struct device *hwmon;
 	struct attribute *mlxreg_hotplug_attr[MLXREG_HOTPLUG_ATTRS_MAX + 1];
@@ -91,6 +95,7 @@ struct mlxreg_hotplug_priv_data {
 	u32 mask;
 	u32 aggr_cache;
 	bool after_probe;
+	u8 not_asserted;
 };
 
 static int mlxreg_hotplug_device_create(struct mlxreg_hotplug_priv_data *priv,
@@ -409,6 +414,18 @@ static void mlxreg_hotplug_work_handler(struct work_struct *work)
 	aggr_asserted = priv->aggr_cache ^ regval;
 	priv->aggr_cache = regval;
 
+	/*
+	 * Handler is invoked, but no assertion is detected at top aggregation
+	 * status level. Set aggr_asserted to mask value to allow handler extra
+	 * run over all relevant signals to recover any missed signal.
+	 */
+	if (priv->not_asserted == MLXREG_HOTPLUG_NOT_ASSERT) {
+		priv->not_asserted = 0;
+		aggr_asserted = pdata->mask;
+	}
+	if (!aggr_asserted)
+		goto unmask_event;
+
 	/* Handle topology and health configuration changes. */
 	for (i = 0; i < pdata->counter; i++, item++) {
 		if (aggr_asserted & item->aggr_mask) {
@@ -419,27 +436,26 @@ static void mlxreg_hotplug_work_handler(struct work_struct *work)
 		}
 	}
 
-	if (aggr_asserted) {
-		spin_lock_irqsave(&priv->lock, flags);
+	spin_lock_irqsave(&priv->lock, flags);
 
-		/*
-		 * It is possible, that some signals have been inserted, while
-		 * interrupt has been masked by mlxreg_hotplug_work_handler.
-		 * In this case such signals will be missed. In order to handle
-		 * these signals delayed work is canceled and work task
-		 * re-scheduled for immediate execution. It allows to handle
-		 * missed signals, if any. In other case work handler just
-		 * validates that no new signals have been received during
-		 * masking.
-		 */
-		cancel_delayed_work(&priv->dwork_irq);
-		schedule_delayed_work(&priv->dwork_irq, 0);
+	/*
+	 * It is possible, that some signals have been inserted, while
+	 * interrupt has been masked by mlxreg_hotplug_work_handler. In this
+	 * case such signals will be missed. In order to handle these signals
+	 * delayed work is canceled and work task re-scheduled for immediate
+	 * execution. It allows to handle missed signals, if any. In other case
+	 * work handler just validates that no new signals have been received
+	 * during masking.
+	 */
+	cancel_delayed_work(&priv->dwork_irq);
+	schedule_delayed_work(&priv->dwork_irq, 0);
 
-		spin_unlock_irqrestore(&priv->lock, flags);
+	spin_unlock_irqrestore(&priv->lock, flags);
 
-		return;
-	}
+	return;
 
+unmask_event:
+	priv->not_asserted++;
 	/* Unmask aggregation event (no need acknowledge). */
 	ret = regmap_write(priv->regmap, pdata->cell +
 			   MLXREG_HOTPLUG_AGGR_MASK_OFF, pdata->mask);