rtlwifi: rtl8821ae: Fix 5G failure when EEPROM is incorrectly encoded

Kalle Valo kvalo at codeaurora.org
Mon Jan 25 13:22:03 UTC 2016

> 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 at lwfinger.net>
> Cc: littlesmartguy at gmail.com
> Cc: gabe at codehaus.org
> Cc: Stable <stable at vger.kernel.org> [v4.2+]

Thanks, applied to wireless-drivers.git.

Kalle Valo

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