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SubjectRe: drivers/soundwire/qcom.c:767: undefined reference to `slimbus_bus'
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On 11/24/20 9:51 PM, Vinod Koul wrote:
> Hi Randy,
>
> On 04-11-20, 19:32, Randy Dunlap wrote:
>> On 11/2/20 11:47 AM, kernel test robot wrote:
>>> All errors (new ones prefixed by >>):
>>>
>>> or1k-linux-ld: drivers/soundwire/qcom.o: in function `qcom_swrm_probe':
>>>>> drivers/soundwire/qcom.c:767: undefined reference to `slimbus_bus'
>>>>> or1k-linux-ld: drivers/soundwire/qcom.c:771: undefined reference to `slimbus_bus'
>>>
>>> 09309093d5e8f87 Jonathan Marek 2020-09-08 770 #if IS_ENABLED(CONFIG_SLIMBUS)
>>> 02efb49aa805cee Srinivas Kandagatla 2020-01-13 @771 if (dev->parent->bus == &slimbus_bus) {
>>> 5bd773242f75da3 Jonathan Marek 2020-09-05 772 #else
>>> 5bd773242f75da3 Jonathan Marek 2020-09-05 773 if (false) {
>>> 5bd773242f75da3 Jonathan Marek 2020-09-05 774 #endif
>>
>> config SOUNDWIRE_QCOM
>> tristate "Qualcomm SoundWire Master driver"
>> imply SLIMBUS
>> depends on SND_SOC
>>
>> The kernel config that was attached has:
>> CONFIG_SOUNDWIRE_QCOM=y
>> CONFIG_SLIMBUS=m
>>
>> I expected that "imply" would make SLIMBUS=y since SOUNDWIRE_QCOM=y,
>> but I guess that's not the case. :(
>>
>> Any ideas about what to do here?
>
> Sorry to have missed this earlier. I did some digging and found the
> Kconfig code to be correct, but not the driver code. Per the
> Documentation if we are using imply we should use IS_REACHABLE() rather
> than IS_ENABLED.
>
> This seems to take care of build failure for me on arm64 and x64 builds.
>
> Can you confirm with below patch:
>
> ---><8---
>
> From: Vinod Koul <vkoul@kernel.org>
> Date: Wed, 25 Nov 2020 11:15:22 +0530
> Subject: [PATCH] soundwire: qcom: Fix build failure when slimbus is module
>
> Commit 5bd773242f75 ("soundwire: qcom: avoid dependency on
> CONFIG_SLIMBUS") removed hard dependency on Slimbus for qcom driver but
> it results in build failure when:
> CONFIG_SOUNDWIRE_QCOM=y
> CONFIG_SLIMBUS=m
>
> drivers/soundwire/qcom.o: In function `qcom_swrm_probe':
> qcom.c:(.text+0xf44): undefined reference to `slimbus_bus'
>
> Fix this by using IS_REACHABLE() in driver which is recommended to be
> sued with imply.

used

>
> Fixes: 5bd773242f75 ("soundwire: qcom: avoid dependency on CONFIG_SLIMBUS")
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Vinod Koul <vkoul@kernel.org>

Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested

Thanks.

> ---
> drivers/soundwire/qcom.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
> index fbca4ebf63e9..6d22df01f354 100644
> --- a/drivers/soundwire/qcom.c
> +++ b/drivers/soundwire/qcom.c
> @@ -799,7 +799,7 @@ static int qcom_swrm_probe(struct platform_device *pdev)
> data = of_device_get_match_data(dev);
> ctrl->rows_index = sdw_find_row_index(data->default_rows);
> ctrl->cols_index = sdw_find_col_index(data->default_cols);
> -#if IS_ENABLED(CONFIG_SLIMBUS)
> +#if IS_REACHABLE(CONFIG_SLIMBUS)
> if (dev->parent->bus == &slimbus_bus) {
> #else
> if (false) {
>

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