linux-kernel - [PATCH 3/3] phy: mapphone-mdm6600: add gpiolib dependency

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Date:   Mon,  4 Mar 2019 21:23:58 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Tony Lindgren <tony@...mide.com>,
        Rob Herring <robh@...nel.org>, Arnd Bergmann <arnd@...db.de>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] phy: mapphone-mdm6600: add gpiolib dependency

gcc points out that when CONFIG_GPIOLIB is disabled,
gpiod_get_array_value_cansleep() returns 0 but fails to set its output:

drivers/phy/motorola/phy-mapphone-mdm6600.c: In function 'phy_mdm6600_status':
drivers/phy/motorola/phy-mapphone-mdm6600.c:220:24: error: 'values[0]' is used uninitialized in this function [-Werror=uninitialized]

This could be fixed more generally in gpiolib by returning a failure
code, but for this specific case, the easier workaround is to add a
gpiolib dependency.

Fixes: 5d1ebbda0318 ("phy: mapphone-mdm6600: Add USB PHY driver for MDM6600 on Droid 4")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 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
-- 
2.20.0