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From:   Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= <toke@redhat.com>
To:     Johannes Berg <johannes@sipsolutions.net>,
        linux-wireless@vger.kernel.org
Cc:     Johannes Berg <johannes.berg@intel.com>,
        Jiri Kosina <jikos@kernel.org>,
        Aaron Hill <aa1ronham@gmail.com>,
        Lukas Redlinger <rel+kernel@agilox.net>,
        Oleksii Shevchuk <alxchk@gmail.com>
Subject: Re: [PATCH v2] mac80211: keep BHs disabled while calling drv_tx_wake_queue()
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References: <1569928763-I3e8838c5ecad878e59d4a94eb069a90f6641461a@changeid>
Date:   Tue, 01 Oct 2019 13:44:30 +0200
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Johannes Berg <johannes@sipsolutions.net> writes:

> From: Johannes Berg <johannes.berg@intel.com>
>
> Drivers typically expect this, as it's the case for almost all cases
> where this is called (i.e. from the TX path). Also, the code in mac80211
> itself (if the driver calls ieee80211_tx_dequeue()) expects this as it
> uses this_cpu_ptr() without additional protection.
>
> This should fix various reports of the problem:
> https://bugzilla.kernel.org/show_bug.cgi?id=3D204127
> https://lore.kernel.org/linux-wireless/CAN5HydrWb3o_FE6A1XDnP1E+xS66d5kiE=
uhHfiGKkLNQokx13Q@mail.gmail.com/
> https://lore.kernel.org/lkml/nycvar.YFH.7.76.1909111238470.473@cbobk.fhfr=
.pm/
>
> Reported-by: Jiri Kosina <jikos@kernel.org>
> Reported-by: Aaron Hill <aa1ronham@gmail.com>
> Reported-by: Lukas Redlinger <rel+kernel@agilox.net>
> Reported-by: Oleksii Shevchuk <alxchk@gmail.com>
> Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Reviewed-by: Toke H=C3=B8iland-J=C3=B8rgensen <toke@redhat.com>