From ff06d03a38370251cc553250ae3256d6cf9ccbd4 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Thu, 11 Dec 2014 20:07:58 +0000
Subject: [PATCH] cfg80211: add support for changing the device mac address via
sysfs
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 43638
---
.../120-cfg80211_allow_perm_addr_change.patch | 43 +++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 package/kernel/mac80211/patches/120-cfg80211_allow_perm_addr_change.patch
diff --git a/package/kernel/mac80211/patches/120-cfg80211_allow_perm_addr_change.patch b/package/kernel/mac80211/patches/120-cfg80211_allow_perm_addr_change.patch
new file mode 100644
index 0000000000..ffd8807ccc
--- /dev/null
+++ b/package/kernel/mac80211/patches/120-cfg80211_allow_perm_addr_change.patch
@@ -0,0 +1,43 @@
+--- a/net/wireless/sysfs.c
++++ b/net/wireless/sysfs.c
+@@ -24,18 +24,35 @@ static inline struct cfg80211_registered
+ return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
+ }
+
+-#define SHOW_FMT(name, fmt, member) \
++#define SHOW_FMT(name, fmt, member, mode) \
+ 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 DEVICE_ATTR_RO(name)
++static DEVICE_ATTR_##mode(name)
+
+-SHOW_FMT(index, "%d", wiphy_idx);
+-SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
+-SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
++static ssize_t macaddress_store(struct device *dev,
++ struct device_attribute *attr,
++ const char *buf, size_t len)
++{
++ u8 mac[ETH_ALEN];
++
++ if (!mac_pton(buf, mac))
++ return -EINVAL;
++
++ if (buf[3 * ETH_ALEN - 1] && buf[3 * ETH_ALEN - 1] != '\n')
++ return -EINVAL;
++
++ memcpy(dev_to_rdev(dev)->wiphy.perm_addr, mac, ETH_ALEN);
++
++ return strnlen(buf, len);
++}
++
++SHOW_FMT(index, "%d", wiphy_idx, RO);
++SHOW_FMT(macaddress, "%pM", wiphy.perm_addr, RW);
++SHOW_FMT(address_mask, "%pM", wiphy.addr_mask, RO);
+
+ static ssize_t name_show(struct device *dev,
+ struct device_attribute *attr,
--
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