Messages in this thread | | | Subject | Re: [PATCH] mac80211: fix race in ieee80211_register_hw() | From | Johannes Berg <> | Date | Mon, 06 Apr 2020 17:06:19 +0200 |
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On Mon, 2020-04-06 at 19:55 +0530, Krishna Chaitanya wrote:
> > iw phy0 interface add wlan0 type station > > ip link set wlan0 up > Ah okay, got it, thanks. Very narrow window though :-) as the > alloc_ordered_workqueue > doesn't need RTNL and there is a long way to go to do if_add() from > user and setup > the driver for interrupts.
True, I do wonder how this is hit. Maybe something with no preempt and a uevent triggering things?
> Again depends on the driver though, it > should properly handle > pending ieee80211_register_hw() with start().
It could, but it'd be really tricky. Much better to fix mac80211.
johannes
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