linux-kernel - Re: [PATCH AUTOSEL 5.2 072/185] ALSA: hda: Add codec on bus address table lately

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Date:   Mon, 23 Sep 2019 09:30:25 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 5.2 072/185] ALSA: hda: Add codec on bus address
 table lately

On Sun, Sep 22, 2019 at 09:06:12PM +0200, Takashi Iwai wrote:
>On Sun, 22 Sep 2019 20:47:30 +0200,
>Sasha Levin wrote:
>>
>> From: Takashi Iwai <tiwai@...e.de>
>>
>> [ Upstream commit ee5f85d9290fe25d460bd320b7fe073075d72d33 ]
>>
>> The call of snd_hdac_bus_add_device() is needed only for registering
>> the codec onto the bus caddr_tbl[] that is referred essentially only
>> in the unsol event handler.  That is, the reason of this call and the
>> release by the counter-part function snd_hdac_bus_remove_device() is
>> just to assure that the unsol event gets notified to the codec.
>>
>> But the current implementation of the unsol notification wouldn't work
>> properly when the codec is still in a premature init state.  So this
>> patch tries to work around it by delaying the caddr_tbl[] registration
>> at the point of snd_hdac_device_register().
>>
>> Also, the order of snd_hdac_bus_remove_device() and device_del() calls
>> are shuffled to make sure that the unsol event is masked before
>> deleting the device.
>>
>> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=204565
>> Signed-off-by: Takashi Iwai <tiwai@...e.de>
>> Signed-off-by: Sasha Levin <sashal@...nel.org>
>
>The upstream commit was reverted later by 246bb4aaa4f4, which has even
>Fixes tag pointing this.  So please drop this.

I'll drop it, thank you.

>BTW, this is the second time AUTOSEL overlooked the existing revert.
>I'm afraid something is missing in the check.

Usually it's the case that I check for fixes/reverts once I compile the
series, and again right before I queue it up to a stable tree. In
between fixes and reverts tend to sneak in just like in this case.

In general, I also check the -rcs for fixes and reverts during their
review window, so while sometimes we send out mails with patches that
have a fix or revert upstream, they rarely make it into a released
stable kernel.

--
Thanks,
Sasha