Merge tag 'char-misc-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull EXTCON patches from Greg Kroah-Hartman:
 "Here are some drivers/extcon/ patches that I forgot to have you pull
  in the larger char/misc patchset from yesterday, for the 3.8-rc1
  kernel.

  Nothing major here, just some driver updates, and cleanups, all of
  which have been in linux-next for a while now.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

* tag 'char-misc-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  extcon: kernel_doc style fix
  extcon: max77693: Fix uninitialised variable warning
  extcon: max77693: Use devm_kzalloc
  extcon: max8997: Use devm_kzalloc
  extcon: max8997: Fix a typo
  extcon: max8997: Fix checkpatch error
  extcon: max77693: Fix coding style
  extcon: max77693: Fix incorrect error check and return value
  extcon: max8997: Fix incorrect error check and return value
  extcon: Fix return value in extcon-class.c
  extcon: Add missing header file to extcon.h
  extcon: arizona: unlock mutex on error path in arizona_micdet()

5 files changed, 56 insertions, 61 deletions

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index f10f05d4ee9..414aed50b1b 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -166,6 +166,7 @@ static irqreturn_t arizona_micdet(int irq, void *data)
 	ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
 	if (ret != 0) {
 		dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
+		mutex_unlock(&info->lock);
 		return IRQ_NONE;
 	}
 
diff --git a/drivers/extcon/extcon-class.c b/drivers/extcon/extcon-class.c
index d398821097f..60adc04b056 100644
--- a/drivers/extcon/extcon-class.c
+++ b/drivers/extcon/extcon-class.c
@@ -472,7 +472,7 @@ int extcon_register_interest(struct extcon_specific_cable_nb *obj,
 
 		obj->cable_index = extcon_find_cable_index(obj->edev, cable_name);
 		if (obj->cable_index < 0)
-			return -ENODEV;
+			return obj->cable_index;
 
 		obj->user_nb = nb;
 
diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
index b656dfa401a..8c17b65eb74 100644
--- a/drivers/extcon/extcon-max77693.c
+++ b/drivers/extcon/extcon-max77693.c
@@ -657,17 +657,17 @@ static int max77693_muic_probe(struct platform_device *pdev)
 	int ret, i;
 	u8 id;
 
-	info = kzalloc(sizeof(struct max77693_muic_info), GFP_KERNEL);
+	info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
+				   GFP_KERNEL);
 	if (!info) {
 		dev_err(&pdev->dev, "failed to allocate memory\n");
-		ret = -ENOMEM;
-		goto err_kfree;
+		return -ENOMEM;
 	}
 	info->dev = &pdev->dev;
 	info->max77693 = max77693;
-	if (info->max77693->regmap_muic)
+	if (info->max77693->regmap_muic) {
 		dev_dbg(&pdev->dev, "allocate register map\n");
-	else {
+	} else {
 		info->max77693->regmap_muic = devm_regmap_init_i2c(
 						info->max77693->muic,
 						&max77693_muic_regmap_config);
@@ -675,7 +675,7 @@ static int max77693_muic_probe(struct platform_device *pdev)
 			ret = PTR_ERR(info->max77693->regmap_muic);
 			dev_err(max77693->dev,
 				"failed to allocate register map: %d\n", ret);
-			goto err_regmap;
+			return ret;
 		}
 	}
 	platform_set_drvdata(pdev, info);
@@ -686,11 +686,13 @@ static int max77693_muic_probe(struct platform_device *pdev)
 	/* Support irq domain for MAX77693 MUIC device */
 	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
 		struct max77693_muic_irq *muic_irq = &muic_irqs[i];
-		int virq = 0;
+		unsigned int virq = 0;
 
 		virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq);
-		if (!virq)
+		if (!virq) {
+			ret = -EINVAL;
 			goto err_irq;
+		}
 		muic_irq->virq = virq;
 
 		ret = request_threaded_irq(virq, NULL,
@@ -702,14 +704,13 @@ static int max77693_muic_probe(struct platform_device *pdev)
 				" error :%d)\n",
 				muic_irq->irq, ret);
 
-			for (i = i - 1; i >= 0; i--)
-				free_irq(muic_irq->virq, info);
 			goto err_irq;
 		}
 	}
 
 	/* Initialize extcon device */
-	info->edev = kzalloc(sizeof(struct extcon_dev), GFP_KERNEL);
+	info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
+				  GFP_KERNEL);
 	if (!info->edev) {
 		dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
 		ret = -ENOMEM;
@@ -720,7 +721,7 @@ static int max77693_muic_probe(struct platform_device *pdev)
 	ret = extcon_dev_register(info->edev, NULL);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register extcon device\n");
-		goto err_extcon;
+		goto err_irq;
 	}
 
 	/* Initialize MUIC register by using platform data */
@@ -753,7 +754,7 @@ static int max77693_muic_probe(struct platform_device *pdev)
 			MAX77693_MUIC_REG_ID, &id);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to read revision number\n");
-		goto err_extcon;
+		goto err_irq;
 	}
 	dev_info(info->dev, "device ID : 0x%x\n", id);
 
@@ -765,12 +766,9 @@ static int max77693_muic_probe(struct platform_device *pdev)
 
 	return ret;
 
-err_extcon:
-	kfree(info->edev);
 err_irq:
-err_regmap:
-	kfree(info);
-err_kfree:
+	while (--i >= 0)
+		free_irq(muic_irqs[i].virq, info);
 	return ret;
 }
 
@@ -783,8 +781,6 @@ static int max77693_muic_remove(struct platform_device *pdev)
 		free_irq(muic_irqs[i].virq, info);
 	cancel_work_sync(&info->irq_work);
 	extcon_dev_unregister(info->edev);
-	kfree(info->edev);
-	kfree(info);
 
 	return 0;
 }
diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index bad76f51161..93009fe6ef0 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -1,7 +1,7 @@
 /*
  * extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC
  *
- *  Copyright (C) 2012 Samsung Electrnoics
+ *  Copyright (C) 2012 Samsung Electronics
  *  Donggeun Kim <dg77.kim@samsung.com>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -433,11 +433,11 @@ static int max8997_muic_probe(struct platform_device *pdev)
 	struct max8997_muic_info *info;
 	int ret, i;
 
-	info = kzalloc(sizeof(struct max8997_muic_info), GFP_KERNEL);
+	info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
+			    GFP_KERNEL);
 	if (!info) {
 		dev_err(&pdev->dev, "failed to allocate memory\n");
-		ret = -ENOMEM;
-		goto err_kfree;
+		return -ENOMEM;
 	}
 
 	info->dev = &pdev->dev;
@@ -450,14 +450,16 @@ static int max8997_muic_probe(struct platform_device *pdev)
 
 	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
 		struct max8997_muic_irq *muic_irq = &muic_irqs[i];
-		int virq = 0;
+		unsigned int virq = 0;
 
 		virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
-		if (!virq)
+		if (!virq) {
+			ret = -EINVAL;
 			goto err_irq;
+		}
 		muic_irq->virq = virq;
 
-		ret = request_threaded_irq(virq, NULL,max8997_muic_irq_handler,
+		ret = request_threaded_irq(virq, NULL, max8997_muic_irq_handler,
 				0, muic_irq->name, info);
 		if (ret) {
 			dev_err(&pdev->dev,
@@ -469,7 +471,8 @@ static int max8997_muic_probe(struct platform_device *pdev)
 	}
 
 	/* External connector */
-	info->edev = kzalloc(sizeof(struct extcon_dev), GFP_KERNEL);
+	info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
+				  GFP_KERNEL);
 	if (!info->edev) {
 		dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
 		ret = -ENOMEM;
@@ -480,7 +483,7 @@ static int max8997_muic_probe(struct platform_device *pdev)
 	ret = extcon_dev_register(info->edev, NULL);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register extcon device\n");
-		goto err_extcon;
+		goto err_irq;
 	}
 
 	/* Initialize registers according to platform data */
@@ -498,13 +501,9 @@ static int max8997_muic_probe(struct platform_device *pdev)
 
 	return ret;
 
-err_extcon:
-	kfree(info->edev);
 err_irq:
 	while (--i >= 0)
 		free_irq(muic_irqs[i].virq, info);
-	kfree(info);
-err_kfree:
 	return ret;
 }
 
@@ -519,9 +518,6 @@ static int max8997_muic_remove(struct platform_device *pdev)
 
 	extcon_dev_unregister(info->edev);
 
-	kfree(info->edev);
-	kfree(info);
-
 	return 0;
 }
 
diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 2c26c14cd71..fcb51c88319 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -23,7 +23,9 @@
 #ifndef __LINUX_EXTCON_H__
 #define __LINUX_EXTCON_H__
 
+#include <linux/device.h>
 #include <linux/notifier.h>
+#include <linux/sysfs.h>
 
 #define SUPPORTED_CABLE_MAX	32
 #define CABLE_NAME_MAX		30
@@ -74,12 +76,12 @@ struct extcon_cable;
 
 /**
  * struct extcon_dev - An extcon device represents one external connector.
- * @name	The name of this extcon device. Parent device name is used
+ * @name:	The name of this extcon device. Parent device name is used
  *		if NULL.
- * @supported_cable	Array of supported cable names ending with NULL.
+ * @supported_cable:	Array of supported cable names ending with NULL.
  *			If supported_cable is NULL, cable name related APIs
  *			are disabled.
- * @mutually_exclusive	Array of mutually exclusive set of cables that cannot
+ * @mutually_exclusive:	Array of mutually exclusive set of cables that cannot
  *			be attached simultaneously. The array should be
  *			ending with NULL or be NULL (no mutually exclusive
  *			cables). For example, if it is { 0x7, 0x30, 0}, then,
@@ -87,21 +89,21 @@ struct extcon_cable;
  *			be attached simulataneously. {0x7, 0} is equivalent to
  *			{0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
  *			can be no simultaneous connections.
- * @print_name	An optional callback to override the method to print the
+ * @print_name:	An optional callback to override the method to print the
  *		name of the extcon device.
- * @print_state	An optional callback to override the method to print the
+ * @print_state:	An optional callback to override the method to print the
  *		status of the extcon device.
- * @dev		Device of this extcon. Do not provide at register-time.
- * @state	Attach/detach state of this extcon. Do not provide at
+ * @dev:	Device of this extcon. Do not provide at register-time.
+ * @state:	Attach/detach state of this extcon. Do not provide at
  *		register-time
- * @nh	Notifier for the state change events from this extcon
- * @entry	To support list of extcon devices so that users can search
+ * @nh:	Notifier for the state change events from this extcon
+ * @entry:	To support list of extcon devices so that users can search
  *		for extcon devices based on the extcon name.
- * @lock
- * @max_supported	Internal value to store the number of cables.
- * @extcon_dev_type	Device_type struct to provide attribute_groups
+ * @lock:
+ * @max_supported:	Internal value to store the number of cables.
+ * @extcon_dev_type:	Device_type struct to provide attribute_groups
  *			customized for each extcon device.
- * @cables	Sysfs subdirectories. Each represents one cable.
+ * @cables:	Sysfs subdirectories. Each represents one cable.
  *
  * In most cases, users only need to provide "User initializing data" of
  * this struct when registering an extcon. In some exceptional cases,
@@ -137,12 +139,12 @@ struct extcon_dev {
 
 /**
  * struct extcon_cable	- An internal data for each cable of extcon device.
- * @edev	The extcon device
- * @cable_index	Index of this cable in the edev
- * @attr_g	Attribute group for the cable
- * @attr_name	"name" sysfs entry
- * @attr_state	"state" sysfs entry
- * @attrs	Array pointing to attr_name and attr_state for attr_g
+ * @edev:	The extcon device
+ * @cable_index:	Index of this cable in the edev
+ * @attr_g:	Attribute group for the cable
+ * @attr_name:	"name" sysfs entry
+ * @attr_state:	"state" sysfs entry
+ * @attrs:	Array pointing to attr_name and attr_state for attr_g
  */
 struct extcon_cable {
 	struct extcon_dev *edev;
@@ -158,11 +160,11 @@ struct extcon_cable {
 /**
  * struct extcon_specific_cable_nb - An internal data for
  *				extcon_register_interest().
- * @internal_nb	a notifier block bridging extcon notifier and cable notifier.
- * @user_nb	user provided notifier block for events from a specific cable.
- * @cable_index	the target cable.
- * @edev	the target extcon device.
- * @previous_value	the saved previous event value.
+ * @internal_nb:	a notifier block bridging extcon notifier and cable notifier.
+ * @user_nb:	user provided notifier block for events from a specific cable.
+ * @cable_index:	the target cable.
+ * @edev:	the target extcon device.
+ * @previous_value:	the saved previous event value.
  */
 struct extcon_specific_cable_nb {
 	struct notifier_block internal_nb;