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Date: Mon, 11 Aug 2014 14:04:35 -0700 From: Daniel Gimpelevich <daniel@...pelevich.san-francisco.ca.us> To: Marcel Holtmann <marcel@...tmann.org> Cc: "John W. Linville" <linville@...driver.com>, "linux-wireless@...r.kernel.org Wireless" <linux-wireless@...r.kernel.org>, Johannes Berg <johannes@...solutions.net>, "David S. Miller" <davem@...emloft.net>, Network Development <netdev@...r.kernel.org>, linux-kernel@...r.kernel.org Subject: Re: [PATCH] allow setting wiphy.perm_addr after driver probe On Mon, 2014-08-11 at 13:56 -0700, Marcel Holtmann wrote: > The initial wlan0 can be removed as every other netdev attached to the > wiphy. It can also be as easily re-created. > > Since the wiphy does not have a valid MAC address, my proposal here > would be to just not create the wlan0 in the first place. This means > that the wiphy can be still discovered via nl80211. I repeat, currently wlan0 is *not* created. > It also means that the wlan0 netdev needs to be created by userspace > now. And a valid NL80211_ATTR_MAC be provided. Similar to what is > already done for P2P devices at the moment. That should just solve the > problem. The creation of wlan0 already comes from userspace, but the PHY has its own MAC. > We really do not want to announce a netdev when registering the wiphy > device and then having to mess with its MAC address via sysfs somehow. > This all needs to be properly reflected over RTNL. > Again, no netdev is announced. There just isn't a way to set the MAC of the wiphy device itself. How about this: What if the driver were to leave the MAC at all zeros initially, and sysfs could set that if and only if it's all zeros at the time? -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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