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SubjectRe: [PATCH] phy: mapphone-mdm6600: add gpiolib dependency
Hi,

On Wed, Apr 04, 2018 at 12:27:19PM +0200, Arnd Bergmann wrote:
> Without gpiolib, the gpiod_get_array_value_cansleep() is an empty stub,
> so gcc notices that the resulting array is never initialized:
>
> drivers/phy/motorola/phy-mapphone-mdm6600.c: In function 'phy_mdm6600_status':
> drivers/phy/motorola/phy-mapphone-mdm6600.c:188:16: error: 'values[0]' is used uninitialized in this function [-Werror=uninitialized]
> val |= values[i] << i;
> ~~~~~~^~~
> drivers/phy/motorola/phy-mapphone-mdm6600.c:188:16: error: 'values[1]' is used uninitialized in this function [-Werror=uninitialized]
> drivers/phy/motorola/phy-mapphone-mdm6600.c:188:16: error: 'values[2]' is used uninitialized in this function [-Werror=uninitialized]
> cc1: all warnings being treated as errors
>
> With gpiolib enabled, this can't happen and we don't get the warning, so
> let's just add a Kconfig dependency for it.
>
> Fixes: 5d1ebbda0318 ("phy: mapphone-mdm6600: Add USB PHY driver for MDM6600 on Droid 4")
> Cc: Tony Lindgren <tony@atomide.com>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

-- Sebastian

> ---
> drivers/phy/motorola/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/phy/motorola/Kconfig b/drivers/phy/motorola/Kconfig
> index 82651524ffb9..718f8729701d 100644
> --- a/drivers/phy/motorola/Kconfig
> +++ b/drivers/phy/motorola/Kconfig
> @@ -13,7 +13,7 @@ config PHY_CPCAP_USB
>
> config PHY_MAPPHONE_MDM6600
> tristate "Motorola Mapphone MDM6600 modem USB PHY driver"
> - depends on OF && USB_SUPPORT
> + depends on OF && USB_SUPPORT && GPIOLIB
> select GENERIC_PHY
> help
> Enable this for MDM6600 USB modem to work on Motorola phones
> --
> 2.9.0
>
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