Re: [regressions] ath11k: v5.12.3 mhi regression

From: Kalle Valo <kvalo@codeaurora.org>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Bhaumik Bhatt <bbhatt@codeaurora.org>,
	Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
	Loic Poulain <loic.poulain@linaro.org>,
	ath11k@lists.infradead.org, linux-wireless@vger.kernel.org,
	regressions@lists.linux.dev, stable@vger.kernel.org
Subject: Re: [regressions] ath11k: v5.12.3 mhi regression
Date: Mon, 24 May 2021 08:56:14 +0300	[thread overview]
Message-ID: <87eedwhdz5.fsf@codeaurora.org> (raw)
In-Reply-To: <YKanuzzvDhztYxm/@kroah.com> (Greg KH's message of "Thu, 20 May 2021 20:17:31 +0200")

Greg KH <gregkh@linuxfoundation.org> writes:

> On Thu, May 20, 2021 at 11:04:05AM -0700, Bhaumik Bhatt wrote:
>> On 2021-05-20 10:58 AM, Greg KH wrote:
>> > On Thu, May 20, 2021 at 10:38:12AM -0700, Bhaumik Bhatt wrote:
>> > > On 2021-05-20 05:36 AM, Kalle Valo wrote:
>> > > > Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> writes:
>> > > >
>> > > > > On Thu, May 20, 2021 at 12:02:40PM +0200, Greg KH wrote:
>> > > > > > On Thu, May 20, 2021 at 12:47:53PM +0300, Kalle Valo wrote:
>> > > > > > > Hi,
>> > > > > > >
>> > > > > > > I got several reports that this mhi commit broke ath11k in v5.12.3:
>> > > > > > >
>> > > > > > > commit 29b9829718c5e9bd68fc1c652f5e0ba9b9a64fed
>> > > > > > > Author: Bhaumik Bhatt <bbhatt@codeaurora.org>
>> > > > > > > Date:   Wed Feb 24 15:23:04 2021 -0800
>> > > > > > >
>> > > > > > >     bus: mhi: core: Process execution environment changes serially
>> > > > > > >
>> > > > > > >     [ Upstream commit ef2126c4e2ea2b92f543fae00a2a0332e4573c48 ]
>> > > > > > >
>> > > > > > > Here are the reports:
>> > > > > > >
>> > > > > > > https://bugzilla.kernel.org/show_bug.cgi?id=213055
>> > > > > > >
>> > > > > > > https://bugzilla.kernel.org/show_bug.cgi?id=212187
>> > > > > > >
>> > > > > > > https://bugs.archlinux.org/task/70849?project=1&string=linux
>> > > > > > >
>> > > > > > > Interestingly v5.13-rc1 seems to work fine, at least for me, though I
>> > > > > > > have not tested v5.12.3 myself. Can someone revert this commit in the
>> > > > > > > stable release so that people get their wifi working again, please?
>> > > > > >
>> > > > > > How does the mhi bus code relate to a ath11k driver?  What bus
>> > > > > > is that
>> > > > > > on?
>> > > > > >
>> > > > >
>> > > > > MHI is the transport used by the ath11k driver to work with the WLAN
>> > > > > devices
>> > > > > over PCIe.
>> > > > >
>> > > > > Regarding the bug, I'd suggest to wait for Bhaumik (the author of
>> > > > > 29b9829718c5)
>> > > > > to comment on the possible commit which needs backporting from
>> > > > > mainline.
>> > > >
>> > > > Ok, but if a quick fix is not available I think we should just revert
>> > > > this in the stable releases. I also got a report that v5.11.21 is
>> > > > broken:
>> > > >
>> > > > https://bugzilla.kernel.org/show_bug.cgi?id=213055#c11
>> > > 
>> > > Please pick [1] as the dependency to [ Upstream commit
>> > > ef2126c4e2ea2b92f543fae00a2a0332e4573c48 ].
>> > 
>> > what is [1]???
>> > 
>> > What commit do I need to backport, a commit id would be nice...
>> > 
>> > thanks,
>> > 
>> > greg k-h
>> Sure Greg. Commit id is: 4884362f6977fc05cbec736625665241c0e0732f
>> 
>> Title of patch:
>> bus: mhi: core: Download AMSS image from appropriate function
>> 
>> It was supposed to be a link but not sure why it's not seen.
>
> Text email doesn't have links :)
>
> Anyway, thanks, now queued up.

I'm now getting confirmations that this issue is fixed in v5.12.6.
Thanks for the quick fix and the quick new release!

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