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

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Date: Tue, 14 May 2024 07:43:25 -0700
From: Jeff Johnson <quic_jjohnson@...cinc.com>
To: 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>
CC: <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 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.

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

/jeff