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authorAndrew Lunn <andrew@lunn.ch>2018-07-17 21:48:12 +0200
committerDavid S. Miller <davem@davemloft.net>2018-07-18 10:01:46 +0900
commitdcb5d0fcaa1ddd0af9c18ef51e6b05e38a6cec71 (patch)
tree6df2dadc6a18ce56330c1b0ac18fd3495d9ae23a
parentaa7f29b07c8702127124d0522e3cd46850cdbc41 (diff)
hwmon: Add helper to tell if a char is invalid in a name
HWMON device names are not allowed to contain "-* \t\n". Add a helper which will return true if passed an invalid character. It can be used to massage a string into a hwmon compatible name by replacing invalid characters with '_'. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Acked-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/hwmon.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/hwmon.h b/include/linux/hwmon.h
index b217101ca76e..9493d4a388db 100644
--- a/include/linux/hwmon.h
+++ b/include/linux/hwmon.h
@@ -398,4 +398,27 @@ devm_hwmon_device_register_with_info(struct device *dev,
void hwmon_device_unregister(struct device *dev);
void devm_hwmon_device_unregister(struct device *dev);
+/**
+ * hwmon_is_bad_char - Is the char invalid in a hwmon name
+ * @ch: the char to be considered
+ *
+ * hwmon_is_bad_char() can be used to determine if the given character
+ * may not be used in a hwmon name.
+ *
+ * Returns true if the char is invalid, false otherwise.
+ */
+static inline bool hwmon_is_bad_char(const char ch)
+{
+ switch (ch) {
+ case '-':
+ case '*':
+ case ' ':
+ case '\t':
+ case '\n':
+ return true;
+ default:
+ return false;
+ }
+}
+
#endif