linux-kernel - Re: [PATCH] rtl8xxxu: fix RTL8723BU connection failure issue after warm reboot

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Message-ID: <874l0ansty.fsf@codeaurora.org>
Date:   Tue, 15 Oct 2019 14:36:41 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Chris Chiu <chiu@...lessm.com>
Cc:     Jes.Sorensen@...il.com, davem@...emloft.net,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux@...lessm.com
Subject: Re: [PATCH] rtl8xxxu: fix RTL8723BU connection failure issue after warm reboot

Chris Chiu <chiu@...lessm.com> writes:

> The RTL8723BU has problems connecting to AP after each warm reboot.
> Sometimes it returns no scan result, and in most cases, it fails
> the authentication for unknown reason. However, it works totally
> fine after cold reboot.
>
> Compare the value of register SYS_CR and SYS_CLK_MAC_CLK_ENABLE
> for cold reboot and warm reboot, the registers imply that the MAC
> is already powered and thus some procedures are skipped during
> driver initialization. Double checked the vendor driver, it reads
> the SYS_CR and SYS_CLK_MAC_CLK_ENABLE also but doesn't skip any
> during initialization based on them. This commit only tells the
> RTL8723BU to do full initialization without checking MAC status.
>
> https://phabricator.endlessm.com/T28000
>
> Signed-off-by: Chris Chiu <chiu@...lessm.com>

If you send a new version of patch mark it as v2 and include a
changelog:

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches#patch_version_missing

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches#changelog_missing

-- 
Kalle Valo