linux-kernel - Re: [PATCH] extcon: axp288: fix link error

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Message-ID: <60239813-fabe-a479-e5fc-7bd68cc94211@redhat.com>
Date:   Mon, 16 Apr 2018 12:02:09 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Tobias Regnery <tobias.regnery@...il.com>, cw00.choi@...sung.com,
        myungjoo.ham@...sung.com, wens@...e.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] extcon: axp288: fix link error

Hi,

On 16-04-18 10:40, Tobias Regnery wrote:
> With CONFIG_AXP288=y and CONFIG_USB_COMMON=n there is the following link
> error:
> 
> drivers/extcon/extcon-axp288.o: In function `axp288_put_role_sw':
> extcon-axp288.c:(.text+0xa0): undefined reference to `usb_role_switch_put'
> drivers/extcon/extcon-axp288.o: In function `axp288_usb_role_work':
> extcon-axp288.c:(.text+0xec): undefined reference to `usb_role_switch_get_role'
> extcon-axp288.c:(.text+0x12c): undefined reference to `usb_role_switch_set_role'
> drivers/extcon/extcon-axp288.o: In function `axp288_extcon_probe':
> extcon-axp288.c:(.text+0x59d): undefined reference to `usb_role_switch_get'
> 
> The above functions are defined in drivers/usb/common/roles.c, but the build
> system only enters the common directory depending on CONFIG_USB_COMMON. Fix
> this by selecting the USB_COMMON symbol.
> 
> Fixes: d54f063cdbe4 ("extcon: axp288: Set USB role where necessary")
> Signed-off-by: Tobias Regnery <tobias.regnery@...il.com>

Patch looks good to me, thanks:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans



> ---
> Hi,
> 
> there is another solution for this problem: replace depends on USB_SUPPORT
> with depends on USB, but since CONFIG_USB selects other symbols I went
> with the minimal fix and select the USB_COMMON symbol.
> ---
>   drivers/extcon/Kconfig | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
> index de15bf55895b..0897bee54c2b 100644
> --- a/drivers/extcon/Kconfig
> +++ b/drivers/extcon/Kconfig
> @@ -31,6 +31,7 @@ config EXTCON_ARIZONA
>   config EXTCON_AXP288
>   	tristate "X-Power AXP288 EXTCON support"
>   	depends on MFD_AXP20X && USB_SUPPORT && X86
> +	select USB_COMMON
>   	select USB_ROLE_SWITCH
>   	help
>   	  Say Y here to enable support for USB peripheral detection
>