linux-kernel - Re: [PATCH] staging: wfx: fix an undefined reference error when CONFIG

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Date:   Sat, 12 Oct 2019 00:13:54 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     Jerome Pouiller <Jerome.Pouiller@...abs.com>
CC:     Greg KH <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] staging: wfx: fix an undefined reference error when CONFIG_MMC=m

On 2019/10/11 23:55, Jerome Pouiller wrote:
> On Friday 11 October 2019 17:51:29 CEST zhong jiang wrote:
> [...]
>> How about the following patch ?
>>
>> diff --git a/drivers/staging/wfx/Makefile b/drivers/staging/wfx/Makefile
>> index 0d9c1ed..77d68b7 100644
>> --- a/drivers/staging/wfx/Makefile
>> +++ b/drivers/staging/wfx/Makefile
>> @@ -19,6 +19,6 @@ wfx-y := \
>>         sta.o \
>>         debug.o
>>  wfx-$(CONFIG_SPI) += bus_spi.o
>> -wfx-$(subst m,y,$(CONFIG_MMC)) += bus_sdio.o
>> +wfx-$(CONFIG_MMC) += bus_sdio.o
>>
>>  obj-$(CONFIG_WFX) += wfx.o
>> diff --git a/drivers/staging/wfx/main.c b/drivers/staging/wfx/main.c
>> index d2508bc..26720a4 100644
>> --- a/drivers/staging/wfx/main.c
>> +++ b/drivers/staging/wfx/main.c
>> @@ -484,16 +484,19 @@ static int __init wfx_core_init(void)
>>
>>         if (IS_ENABLED(CONFIG_SPI))
>>                 ret = spi_register_driver(&wfx_spi_driver);
>> -       if (IS_ENABLED(CONFIG_MMC) && !ret)
>> +#ifdef CONFIG_MMC
>> +       if (!ret)
>>                 ret = sdio_register_driver(&wfx_sdio_driver);
>> +#endif
>>         return ret
>>  }
>>  module_init(wfx_core_init);
>>
>>  static void __exit wfx_core_exit(void)
>>  {
>> -       if (IS_ENABLED(CONFIG_MMC))
>> -               sdio_unregister_driver(&wfx_sdio_driver);
>> +#ifdef CONFIG_MMC
>> +       sdio_unregister_driver(&wfx_sdio_driver);
>> +#endif
>>         if (IS_ENABLED(CONFIG_SPI))
>>                 spi_unregister_driver(&wfx_spi_driver);
>>  }
> Hello zhong,
>
> Can you also check the case where CONFIG_SPI is not set?
I have tested the case and it works well when CONFIG_SPI is not set.

Thanks,
zhong jiang
> Thank you,
>