linux-kernel - Re: [PATCH] wifi: ath10k: fix QCOM_RPROC

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Date: Wed, 15 May 2024 02:45:09 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Jeff Johnson <quic_jjohnson@...cinc.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Kalle Valo <kvalo@...nel.org>, 
	Jeff Johnson <jjohnson@...nel.org>, Stephen Boyd <swboyd@...omium.org>, 
	Rakesh Pillai <quic_pillair@...cinc.com>, linux-wireless@...r.kernel.org, 
	ath10k@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	stable@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH] wifi: ath10k: fix QCOM_RPROC_COMMON dependency

On Tue, May 14, 2024 at 11:43 PM Jeff Johnson <quic_jjohnson@...cinc.com> wrote:
>
> On 5/11/2024 3:49 AM, Dmitry Baryshkov wrote:
> > If ath10k_snoc is built-in, while Qualcomm remoteprocs are built as
> > modules, compilation fails with:
> >
> > /usr/bin/aarch64-linux-gnu-ld: drivers/net/wireless/ath/ath10k/snoc.o: in function `ath10k_modem_init':
> > drivers/net/wireless/ath/ath10k/snoc.c:1534: undefined reference to `qcom_register_ssr_notifier'
> > /usr/bin/aarch64-linux-gnu-ld: drivers/net/wireless/ath/ath10k/snoc.o: in function `ath10k_modem_deinit':
> > drivers/net/wireless/ath/ath10k/snoc.c:1551: undefined reference to `qcom_unregister_ssr_notifier'
> >
> > Add corresponding dependency to ATH10K_SNOC Kconfig entry so that it's
> > built as module if QCOM_RPROC_COMMON is built as module too.
> >
> > Fixes: 747ff7d3d742 ("ath10k: Don't always treat modem stop events as crashes")
> > Cc: stable@...r.kernel.org
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > ---
> >  drivers/net/wireless/ath/ath10k/Kconfig | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/net/wireless/ath/ath10k/Kconfig b/drivers/net/wireless/ath/ath10k/Kconfig
> > index e6ea884cafc1..4f385f4a8cef 100644
> > --- a/drivers/net/wireless/ath/ath10k/Kconfig
> > +++ b/drivers/net/wireless/ath/ath10k/Kconfig
> > @@ -45,6 +45,7 @@ config ATH10K_SNOC
> >       depends on ATH10K
> >       depends on ARCH_QCOM || COMPILE_TEST
> >       depends on QCOM_SMEM
> > +     depends on QCOM_RPROC_COMMON || QCOM_RPROC_COMMON=n
> >       select QCOM_SCM
> >       select QCOM_QMI_HELPERS
> >       help
> >
> > ---
> > base-commit: 75fa778d74b786a1608d55d655d42b480a6fa8bd
> > change-id: 20240511-ath10k-snoc-dep-862a9da2e6bb
>
> I see how this fixes the problem, but this doesn't seem like an ideal
> solution. The fact that the *_ssr_notifier() functions are correctly protected
> by conditional compilation ideally should mean that clients don't need to call
> call out this as a dependency. Otherwise, it would mean we'd need to do this
> for all feature flags.


It depends on if qcom_common.c is optional for ath10k_snoc.

If it is optional, this patch is correct.


If it is mandatory
depends on QCOM_RPROC_COMMON


>
> +linux-kbuild just to make sure there isn't a better approach.


Commit 28d49e171676afb7df7f47798391364af9abed7f suggested

  depends on BAR || !BAR

but

  depends on BAR || BAR=n

works equivalently.



>
> /jeff
>
>


-- 
Best Regards
Masahiro Yamada