[PATCH] allow setting wiphy.perm_addr after driver probe
From: Daniel Gimpelevich <hidden>
Date: 2014-08-11 18:04:35
Also in:
lkml, netdev
On embedded devices, often the BSSID of an access point must be set from userspace during the boot process. This provides a relatively clean way of doing that without major side effects. Signed-off-by: Daniel Gimpelevich <redacted> ---
--- a/net/wireless/sysfs.c 2014-04-19 08:36:52.048511623 -0700
+++ b/net/wireless/sysfs.c 2014-04-19 08:38:09.196894176 -0700@@ -24,18 +24,30 @@ return container_of(dev, struct cfg80211_registered_device, wiphy.dev); } -#define SHOW_FMT(name, fmt, member) \ +#define SHOW_FMT(name, fmt, member, perm) \ 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_ ## perm(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 count) +{ + u8 temp[ETH_ALEN]; + + if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", temp, temp + 1, + temp + 2, temp + 3, temp + 4, temp + 5) == ETH_ALEN) + memcpy(dev_to_rdev(dev)->wiphy.perm_addr, temp, ETH_ALEN); + return count; +} + +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,