wifi: ath10k: fix QCOM_RPROC_COMMON dependency

[PATCH] wifi: ath10k: fix QCOM_RPROC_COMMON dependency

Posted by Dmitry Baryshkov 1 year, 7 months ago

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@vger.kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.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

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Re: [PATCH] wifi: ath10k: fix QCOM_RPROC_COMMON dependency

Posted by Kalle Valo 1 year, 7 months ago

Dmitry Baryshkov <dmitry.baryshkov@linaro.org> 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@vger.kernel.org
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>

Patch applied to ath-current branch of ath.git, thanks.

21ae74e1bf18 wifi: ath10k: fix QCOM_RPROC_COMMON dependency

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20240511-ath10k-snoc-dep-v1-1-9666e3af5c27@linaro.org/

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

Re: [PATCH] wifi: ath10k: fix QCOM_RPROC_COMMON dependency

Posted by Stephen Boyd 1 year, 7 months ago

Quoting Dmitry Baryshkov (2024-05-11 03:49:59)
> 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@vger.kernel.org
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@chromium.org>

Re: [PATCH] wifi: ath10k: fix QCOM_RPROC_COMMON dependency

Posted by Jeff Johnson 1 year, 7 months ago

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@vger.kernel.org
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.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

Re: [PATCH] wifi: ath10k: fix QCOM_RPROC_COMMON dependency

Posted by Masahiro Yamada 1 year, 7 months ago

On Tue, May 14, 2024 at 11:43 PM Jeff Johnson <quic_jjohnson@quicinc.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@vger.kernel.org
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.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

Re: [PATCH] wifi: ath10k: fix QCOM_RPROC_COMMON dependency

Posted by Jeff Johnson 1 year, 7 months ago

On 5/14/2024 10:45 AM, Masahiro Yamada wrote:
> On Tue, May 14, 2024 at 11:43 PM Jeff Johnson <quic_jjohnson@quicinc.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@vger.kernel.org
>>> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.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.

At least from a build perspective it is optional

> 
> 
> 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.

Thanks for the information.

I'll let Kalle decide if he wants to change this in 'pending' to:
	depends on QCOM_RPROC_COMMON || !QCOM_RPROC_COMMON

Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>

Re: [PATCH] wifi: ath10k: fix QCOM_RPROC_COMMON dependency

Posted by Masahiro Yamada 1 year, 7 months ago

On Wed, May 15, 2024 at 3:14 AM Jeff Johnson <quic_jjohnson@quicinc.com> wrote:
>
> On 5/14/2024 10:45 AM, Masahiro Yamada wrote:
> > On Tue, May 14, 2024 at 11:43 PM Jeff Johnson <quic_jjohnson@quicinc.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@vger.kernel.org
> >>> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.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.
>
> At least from a build perspective it is optional



You need to make a decision from a run-time perspective
(that is, whether you are fine with having
ar_snoc->notifier == NULL)


If you are able to build the kernel successfully
but you get a run-time error (e.g. NULL pointer dereference),
it is even worse because run-time debugging is generally more
difficult than compile-time debugging.




-- 
Best Regards
Masahiro Yamada

Re: [PATCH] wifi: ath10k: fix QCOM_RPROC_COMMON dependency

Posted by Jeff Johnson 1 year, 7 months ago

On 5/14/2024 9:10 PM, Masahiro Yamada wrote:
> On Wed, May 15, 2024 at 3:14 AM Jeff Johnson <quic_jjohnson@quicinc.com> wrote:
>>
>> On 5/14/2024 10:45 AM, Masahiro Yamada wrote:
>>> On Tue, May 14, 2024 at 11:43 PM Jeff Johnson <quic_jjohnson@quicinc.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@vger.kernel.org
>>>>> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.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.
>>
>> At least from a build perspective it is optional
> 
> 
> 
> You need to make a decision from a run-time perspective
> (that is, whether you are fine with having
> ar_snoc->notifier == NULL)
> 
> 
> If you are able to build the kernel successfully
> but you get a run-time error (e.g. NULL pointer dereference),
> it is even worse because run-time debugging is generally more
> difficult than compile-time debugging.

The current patch maintains the existing logic, so that is my preference.