usb: phy: gpio-vbus: don't ignore regulator APIs return value

Due to recent changes to regulator API, all
users which don't check regulator_{en,dis}able()'s
return value will generate compile warnings.

Add such checks to gpio-vbus.

Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/phy/phy-gpio-vbus-usb.c b/drivers/usb/phy/phy-gpio-vbus-usb.c
index a7d4ac5..4c76074 100644 (file)
--- a/drivers/usb/phy/phy-gpio-vbus-usb.c
+++ b/drivers/usb/phy/phy-gpio-vbus-usb.c
@@ -61,6 +61,7 @@ static void set_vbus_draw(struct gpio_vbus_data *gpio_vbus, unsigned mA)
 {
        struct regulator *vbus_draw = gpio_vbus->vbus_draw;
        int enabled;
+       int ret;
 
        if (!vbus_draw)
                return;
@@ -69,12 +70,16 @@ static void set_vbus_draw(struct gpio_vbus_data *gpio_vbus, unsigned mA)
        if (mA) {
                regulator_set_current_limit(vbus_draw, 0, 1000 * mA);
                if (!enabled) {
-                       regulator_enable(vbus_draw);
+                       ret = regulator_enable(vbus_draw);
+                       if (ret < 0)
+                               return;
                        gpio_vbus->vbus_draw_enabled = 1;
                }
        } else {
                if (enabled) {
-                       regulator_disable(vbus_draw);
+                       ret = regulator_disable(vbus_draw);
+                       if (ret < 0)
+                               return;
                        gpio_vbus->vbus_draw_enabled = 0;
                }
        }