[PATCHv2 1/4] net: rfkill: add rfkill_find_type function

[Heikki Krogerus]

Helper for finding the type based on name. Useful if the
type needs to be determined based on device property.

Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
---
 include/linux/rfkill.h | 15 +++++++++++++
 net/rfkill/core.c      | 57 +++++++++++++++++++++++++-------------------------
 2 files changed, 44 insertions(+), 28 deletions(-)

diff --git a/include/linux/rfkill.h b/include/linux/rfkill.h
index d901078..522ccbc 100644
--- a/include/linux/rfkill.h
+++ b/include/linux/rfkill.h
@@ -212,6 +212,15 @@ void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw);
  * @rfkill: rfkill struct to query
  */
 bool rfkill_blocked(struct rfkill *rfkill);
+
+/**
+ * rfkill_find_type - Helpper for finding rfkill type by name
+ * @name: the name of the type
+ *
+ * Returns enum rfkill_type that conrresponds the name.
+ */
+enum rfkill_type rfkill_find_type(const char *name);
+
 #else /* !RFKILL */
 static inline struct rfkill * __must_check
 rfkill_alloc(const char *name,
@@ -268,6 +277,12 @@ static inline bool rfkill_blocked(struct rfkill *rfkill)
 {
 	return false;
 }
+
+static inline enum rfkill_type rfkill_find_type(const char *name)
+{
+	return RFKILL_TYPE_ALL;
+}
+
 #endif /* RFKILL || RFKILL_MODULE */
 
 
diff --git a/net/rfkill/core.c b/net/rfkill/core.c
index f53bf3b6..e9a5cdf 100644
--- a/net/rfkill/core.c
+++ b/net/rfkill/core.c
@@ -582,6 +582,33 @@ void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw)
 }
 EXPORT_SYMBOL(rfkill_set_states);
 
+static const char *rfkill_types[NUM_RFKILL_TYPES] = {
+	[RFKILL_TYPE_WLAN]	= "wlan",
+	[RFKILL_TYPE_BLUETOOTH]	= "bluetooth",
+	[RFKILL_TYPE_UWB]	= "ultrawideband",
+	[RFKILL_TYPE_WIMAX]	= "wimax",
+	[RFKILL_TYPE_WWAN]	= "wwan",
+	[RFKILL_TYPE_GPS]	= "gps",
+	[RFKILL_TYPE_FM]	= "fm",
+	[RFKILL_TYPE_NFC]	= "nfc",
+};
+
+enum rfkill_type rfkill_find_type(const char *name)
+{
+	int i;
+
+	BUILD_BUG_ON(!rfkill_types[NUM_RFKILL_TYPES - 1]);
+
+	if (!name)
+		return RFKILL_TYPE_ALL;
+
+	for (i = 1; i < NUM_RFKILL_TYPES; i++)
+		if (!strcmp(name, rfkill_types[i]))
+			return i;
+	return RFKILL_TYPE_ALL;
+}
+EXPORT_SYMBOL(rfkill_find_type);
+
 static ssize_t name_show(struct device *dev, struct device_attribute *attr,
 			 char *buf)
 {
@@ -591,38 +618,12 @@ static ssize_t name_show(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR_RO(name);
 
-static const char *rfkill_get_type_str(enum rfkill_type type)
-{
-	BUILD_BUG_ON(NUM_RFKILL_TYPES != RFKILL_TYPE_NFC + 1);
-
-	switch (type) {
-	case RFKILL_TYPE_WLAN:
-		return "wlan";
-	case RFKILL_TYPE_BLUETOOTH:
-		return "bluetooth";
-	case RFKILL_TYPE_UWB:
-		return "ultrawideband";
-	case RFKILL_TYPE_WIMAX:
-		return "wimax";
-	case RFKILL_TYPE_WWAN:
-		return "wwan";
-	case RFKILL_TYPE_GPS:
-		return "gps";
-	case RFKILL_TYPE_FM:
-		return "fm";
-	case RFKILL_TYPE_NFC:
-		return "nfc";
-	default:
-		BUG();
-	}
-}
-
 static ssize_t type_show(struct device *dev, struct device_attribute *attr,
 			 char *buf)
 {
 	struct rfkill *rfkill = to_rfkill(dev);
 
-	return sprintf(buf, "%s\n", rfkill_get_type_str(rfkill->type));
+	return sprintf(buf, "%s\n", rfkill_types[rfkill->type]);
 }
 static DEVICE_ATTR_RO(type);
 
@@ -768,7 +769,7 @@ static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
 	if (error)
 		return error;
 	error = add_uevent_var(env, "RFKILL_TYPE=%s",
-			       rfkill_get_type_str(rfkill->type));
+			       rfkill_types[rfkill->type]);
 	if (error)
 		return error;
 	spin_lock_irqsave(&rfkill->lock, flags);
-- 
2.7.0.rc3