linux-kernel - Re: [PATCH v2] mmc: rtsx: fix possible linking error if built-in

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Date:	Thu, 8 May 2014 10:31:58 +0200
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Lee Jones <lee.jones@...aro.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	devel@...uxdriverproject.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	Wei WANG <wei_wang@...lsil.com.cn>,
	Roger <rogerable@...ltek.com>
Subject: Re: [PATCH v2] mmc: rtsx: fix possible linking error if built-in

On 8 May 2014 10:27, Arnd Bergmann <arnd@...db.de> wrote:
> rtsx_usb_sdmmc module uses the LED classdev if available, but the code
> failed to consider the situation that it is built-in and the LED classdev is a
> module, leading to following linking error:
>
>    LD      init/built-in.o
> drivers/built-in.o: In function `rtsx_usb_sdmmc_drv_remove':
> rtsx_usb_sdmmc.c:(.text+0x2a018e): undefined reference to
> `led_classdev_unregister'
> drivers/built-in.o: In function `rtsx_usb_sdmmc_drv_probe':
> rtsx_usb_sdmmc.c:(.text+0x2a197e): undefined reference to
> `led_classdev_register'
>
> Fix by excluding such condition when defining macro RTSX_USB_USE_LEDS_CLASS.
>
> Signed-off-by: Roger Tseng <rogerable@...ltek.com>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Acked-by: Ulf Hansson <ulf.hansson@...aro.org>
> ---
> v2 by Arnd: change the second #ifdef as well.

Thanks Arnd, Roger - I will include this one in PR that I send to
Chris in the next few days.

Kind regards
Ulf Hansson

>
> diff --git a/drivers/mmc/host/rtsx_usb_sdmmc.c b/drivers/mmc/host/rtsx_usb_sdmmc.c
> index e11fafa..5d3766e 100644
> --- a/drivers/mmc/host/rtsx_usb_sdmmc.c
> +++ b/drivers/mmc/host/rtsx_usb_sdmmc.c
> @@ -34,7 +34,8 @@
>  #include <linux/mfd/rtsx_usb.h>
>  #include <asm/unaligned.h>
>
> -#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
> +#if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \
> +               defined(CONFIG_MMC_REALTEK_USB_MODULE))
>  #include <linux/leds.h>
>  #include <linux/workqueue.h>
>  #define RTSX_USB_USE_LEDS_CLASS
> @@ -59,7 +60,7 @@ struct rtsx_usb_sdmmc {
>
>         unsigned char           power_mode;
>
> -#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
> +#ifdef RTSX_USB_USE_LEDS_CLASS
>         struct led_classdev     led;
>         char                    led_name[32];
>         struct work_struct      led_work;
>
--
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