netdev - Re: linux-next: build failure after merge of the mhi tree

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Date:   Mon, 28 Sep 2020 19:45:37 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Loic Poulain <loic.poulain@...aro.org>,
        Networking <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ath11k@...ts.infradead.org,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Govind Singh <govinds@...eaurora.org>,
        David Miller <davem@...emloft.net>
Subject: Re: linux-next: build failure after merge of the mhi tree

Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org> writes:

> On Mon, Sep 28, 2020 at 12:34:40PM +0300, Kalle Valo wrote:
>> Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org> writes:
>> 
>> > On Mon, Sep 28, 2020 at 06:42:30PM +1000, Stephen Rothwell wrote:
>> >> Hi all,
>> >> 
>> >> After merging the mhi tree, today's linux-next build (x86_64 allmodconfig)
>> >> failed like this:
>> >> 
>> >> drivers/net/wireless/ath/ath11k/mhi.c:27:4: error: 'struct
>> >> mhi_channel_config' has no member named 'auto_start'
>> >>    27 |   .auto_start = false,
>> >>       |    ^~~~~~~~~~
>> >> drivers/net/wireless/ath/ath11k/mhi.c:42:4: error: 'struct
>> >> mhi_channel_config' has no member named 'auto_start'
>> >>    42 |   .auto_start = false,
>> >>       |    ^~~~~~~~~~
>> >> drivers/net/wireless/ath/ath11k/mhi.c:57:4: error: 'struct
>> >> mhi_channel_config' has no member named 'auto_start'
>> >>    57 |   .auto_start = true,
>> >>       |    ^~~~~~~~~~
>> >> drivers/net/wireless/ath/ath11k/mhi.c:72:4: error: 'struct
>> >> mhi_channel_config' has no member named 'auto_start'
>> >>    72 |   .auto_start = true,
>> >>       |    ^~~~~~~~~~
>> >> 
>> >> Caused by commit
>> >> 
>> >>   ed39d7816885 ("bus: mhi: Remove auto-start option")
>> >> 
>> >> interacting with commit
>> >> 
>> >>   1399fb87ea3e ("ath11k: register MHI controller device for QCA6390")
>> >> 
>> >> from the net-next tree.
>> >> 
>> >> I applied the following merge fix patch, but maybe more is required.
>> >> Even if so, this could be fixed now in the net-next tree.
>> >> 
>> >> From: Stephen Rothwell <sfr@...b.auug.org.au>
>> >> Date: Mon, 28 Sep 2020 18:39:41 +1000
>> >> Subject: [PATCH] fix up for "ath11k: register MHI controller device for QCA6390"
>> >> 
>> >> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
>> >
>> > Sorry, I forgot to submit a patch against net-next for fixing this while merging
>> > the MHI change.
>> 
>> Try to notify the ath11k list (CCed) whenever changing MHI API so that
>> we (ath11k folks) can be prepared for any major changes.
>> 
>
> Okay sure, will do!

Thanks. It's important that ath11k is taken into account while making
changes to MHI, otherwise there can easily be regressions.

I was looking at commit ed39d7816885 ("bus: mhi: Remove auto-start
option") and noticed this in the commit log:

    This is really up to the MHI device(channel) driver to manage the state
    of its channels.

So does this mean we have to make changes in ath11k to accomodate this?
I haven't tested linux-next yet.

-- 
https://patchwork.kernel.org/project/linux-wireless/list/

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