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Race in ieee80211_register_hw()

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Hi all,

I'm using udev/sysfs to detect when a new phy becomes available, and
then immediately open it.

When I insmod the wifi card module driver, it works most of the times,
but sometimes I get this:

ieee80211 phy0: Failed to initialize rate control algorithm


I noticed that ieee80211_register_hw() first registers the PHY, which
makes it available to userspace, then does subsequent config calls on
it. ieee80211_init_rate_ctrl_alg then fails since local->open_count is
not zero.

This is easy to reproduce by adding an msleep() after wiphy_register()

What lock should I use to surround the whole registration process ?

-- 
Maxime


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