From: Kalle Valo <kvalo@codeaurora.org>
To: Larry Finger <Larry.Finger@lwfinger.net>
Cc: devel@driverdev.osuosl.org, linux-wireless@vger.kernel.org,
	littlesmartguy@gmail.com, gabe@codehaus.org,
	Stable <stable@vger.kernel.org>
Subject: Re: [PATCH] rtlwifi: rtl8821ae: Fix 5G failure when EEPROM is incorrectly encoded
References: <1453348719-5546-1-git-send-email-Larry.Finger@lwfinger.net>
Date: Thu, 21 Jan 2016 10:52:35 +0200
In-Reply-To: <1453348719-5546-1-git-send-email-Larry.Finger@lwfinger.net>
	(Larry Finger's message of "Wed, 20 Jan 2016 21:58:39 -0600")
Message-ID: <87oacf1fho.fsf@kamboji.qca.qualcomm.com> (sfid-20160121_095247_256631_CB124994)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Sender: linux-wireless-owner@vger.kernel.org

Larry Finger <Larry.Finger@lwfinger.net> writes:

> Recently, it has been reported that D-Link DWA-582 cards, which use an
> RTL8812AE chip are not able to scan for 5G networks. The problems started
> with kernel 4.2, which is the first version that had commit d10101a60372
> ("rtlwifi: rtl8821ae: Fix problem with regulatory information"). With this
> patch, the driver went from setting a default channel plan to using
> the value derived from EEPROM.
>
> Bug reports at https://bugzilla.kernel.org/show_bug.cgi?id=111031 and
> https://bugzilla.redhat.com/show_bug.cgi?id=1279653 are examples of this
> problem.
>
> The problem was solved once I learned that the internal country code was
> resulting in a regulatory set with only 2.4 GHz channels. With the RTL8821AE
> chips available to me, the country code was such that both 2.4 and 5 GHz
> channels are allowed. The fix is to allow both bands even when the EEPROM
> is incorrectly encoded.
>
> Fixes: d10101a60372 ("rtlwifi: rtl8821ae: Fix problem with regulatory information")
> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
> Cc: littlesmartguy@gmail.com
> Cc: gabe@codehaus.org
> Cc: Stable <stable@vger.kernel.org> [v4.2+]

I'll queue this to 4.5.

-- 
Kalle Valo