linux-kernel - Re: [PATCH] usb: select USB_COMMON for usb role switch config

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Wed, 4 Apr 2018 22:08:43 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: select USB_COMMON for usb role switch config

Hi,

On 04-04-18 14:21, Arnd Bergmann wrote:
> The new axp288 extcon driver has no dependency on USB itself but
> calls the usb role switch helper functions. This causes a link error
> when USB_COMMON is disabled, as that subdirectory never gets entered:
> 
> drivers/extcon/extcon-axp288.o: In function `axp288_usb_role_work':
> extcon-axp288.c:(.text+0x47b): undefined reference to `usb_role_switch_set_role'
> extcon-axp288.c:(.text+0x498): undefined reference to `usb_role_switch_get_role'
> drivers/extcon/extcon-axp288.o: In function `axp288_extcon_probe':
> extcon-axp288.c:(.text+0x675): undefined reference to `usb_role_switch_get'
> extcon-axp288.c:(.text+0x6d1): undefined reference to `usb_role_switch_put'
> drivers/extcon/extcon-axp288.o: In function `axp288_put_role_sw':
> extcon-axp288.c:(.text+0x1c): undefined reference to `usb_role_switch_put'
> 
> There are multiple ways of fixing this, I chose to 'select USB_COMMON',
> since that is how we solved the same problem for other helpers like
> USB_LED_TRIG or PHY drivers.
> 
> Fixes: d54f063cdbe4 ("extcon: axp288: Set USB role where necessary")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
Thanks.

I agree that this is the right way to fix this (matches the other
drivers/usb/Kconfig bits):

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

Regards,

Hans



> ---
>   drivers/usb/Kconfig | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
> index 75f7fb151f71..987fc5ba6321 100644
> --- a/drivers/usb/Kconfig
> +++ b/drivers/usb/Kconfig
> @@ -207,5 +207,6 @@ config USB_ULPI_BUS
>   
>   config USB_ROLE_SWITCH
>   	tristate
> +	select USB_COMMON
>   
>   endif # USB_SUPPORT
>