On Mon, Apr 6, 2020 at 8:36 PM Johannes Berg johannes@sipsolutions.net wrote:
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?
Probably, it might be specific to the dragonboard410c configuration
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.
Sure, anyways it is a good change.