netdev - Re: [PATCH 01/14] brcmfmac: add delay before unregistering the network device

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Message-ID: <530DD131.50205@broadcom.com>
Date:	Wed, 26 Feb 2014 12:34:09 +0100
From:	Arend van Spriel <arend@...adcom.com>
To:	Johannes Berg <johannes@...solutions.net>
CC:	"John W. Linville" <linville@...driver.com>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	David Miller <davem@...emloft.net>, <netdev@...r.kernel.org>
Subject: Re: [PATCH 01/14] brcmfmac: add delay before unregistering the network
 device

On 02/26/2014 12:10 PM, Johannes Berg wrote:
> On Wed, 2014-02-26 at 11:43 +0100, Arend van Spriel wrote:
> 
>> Actually, this was not the reason for the doing the msleep(). The
>> problem was that wpa_supplicant received RTM_DELLINK, before getting the
>> NL08211_DISCONNECT. This resulted in RTM_DELLINK, immediately followed
>> by RTM_ADDLINK, followed by NL80211_DISCONNECT.
> 
> I'm not sure this isn't still possible? I don't know when DELLINK is
> sent.

Given the behaviour I would say before the netdev notifier, which may be
considered wrong. It depends whether the notifier was intended for the
kind of thing that cfg80211 is doing, ie. send a netlink event to
user-space?

Gr. AvS
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