netdev - Re: iwlwifi broken in current -git

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Message-Id: <20191126.131654.606125577060239139.davem@davemloft.net>
Date:   Tue, 26 Nov 2019 13:16:54 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     axboe@...nel.dk
Cc:     johannes.berg@...el.com, emmanuel.grumbach@...el.com,
        luciano.coelho@...el.com, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: iwlwifi broken in current -git

From: Jens Axboe <axboe@...nel.dk>
Date: Tue, 26 Nov 2019 14:04:01 -0700

> Just upgraded my laptop, and iwlwifi won't connect. Not specific to
> the AP, tried a few and no go. Here are the dmesg from loading and
> trying to connect, at some point it just gives up and asks me for
> a password again. v5.4 works just fine.

We know and are working on a fix, the iwlwifi driver does NAPI
completions improperly.

You can set /proc/sys/net/core/gro_normal_batch to '1' as a
temporary workaround.