wireless: clean up sysfs code using %pM

Remove converting the MAC address to a string by a direct byte
conversion and use %pM instead, since the code is now boilerplate
use a macro to define the show functions, and also use the shorter
__ATTR_RO macro to define the attributes.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/wireless/sysfs.c b/net/wireless/sysfs.c
index 29f820e..79a3828 100644 (file)
--- a/net/wireless/sysfs.c
+++ b/net/wireless/sysfs.c
@@ -23,25 +23,20 @@ static inline struct cfg80211_registered_device *dev_to_rdev(
        return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
 }
 
-static ssize_t _show_index(struct device *dev, struct device_attribute *attr,
-                          char *buf)
-{
-       return sprintf(buf, "%d\n", dev_to_rdev(dev)->idx);
+#define SHOW_FMT(name, fmt, member)                                    \
+static ssize_t name ## _show(struct device *dev,                       \
+                             struct device_attribute *attr,            \
+                             char *buf)                                \
+{                                                                      \
+       return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member);        \
 }
 
-static ssize_t _show_permaddr(struct device *dev,
-                             struct device_attribute *attr,
-                             char *buf)
-{
-       unsigned char *addr = dev_to_rdev(dev)->wiphy.perm_addr;
-
-       return sprintf(buf, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
-                      addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
-}
+SHOW_FMT(index, "%d", idx);
+SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
 
 static struct device_attribute ieee80211_dev_attrs[] = {
-       __ATTR(index, S_IRUGO, _show_index, NULL),
-       __ATTR(macaddress, S_IRUGO, _show_permaddr, NULL),
+       __ATTR_RO(index),
+       __ATTR_RO(macaddress),
        {}
 };