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From: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= <toke@toke.dk>
To: Bruno Bieth <bruno@bieth.org>, Pengpeng Hou <pengpeng@iscas.ac.cn>
Cc: Jeff Johnson <jeff.johnson@oss.qualcomm.com>,
 linux-wireless@vger.kernel.org, regressions@lists.linux.dev,
 stable@vger.kernel.org
Subject: Re: [REGRESSION] ath9k_htc: AR9271 can't be brought up (-EMSGSIZE)
 since "wifi: ath9k: reject short WMI command responses"
In-Reply-To: <179300633675.74151.170245467704180950@bieth.org>
References: <179300633675.74151.170245467704180950@bieth.org>
Date: Mon, 26 Oct 2026 11:00:38 +0100
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"Bruno Bieth" <bruno@bieth.org> writes:

> Hi,
>
> After updating from 6.18.48 to 6.18.56, my AR9271 USB adapter
> (0cf3:9271, ath9k_htc, htc_9271-1.4.0.fw) still probes fine, but the
> interface can no longer be brought up: every attempt fails with
> EMSGSIZE ("Message too long"). On 6.18.48 the same adapter associated
> without problems.
>
> I believe the cause is the 6.18.56 backport (e0c21130c1c7) of
>
> 93ce8ea70451 ("wifi: ath9k: reject short WMI command responses")

Yup, this was already reported, and a revert is in 6.18.58. Please try
that.

-Toke