power: supply: Fix build error when CONFIG_POWER_SUPPLY is not enabled.

The build error happens when CONFIG_POWER_SUPPLY is not enabled.

h8300-linux-ld: drivers/usb/dwc3/gadget.o: in function `.L59':
>> gadget.c:(.text+0x655): undefined reference to `power_supply_set_property'

Fixes: 99288de36020 ("usb: dwc3: add an alternate path in vbus_draw callback")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Ray Chi <raychi@google.com>
Link: https://lore.kernel.org/r/20210327182809.1814480-3-raychi@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 81a55e9..b495b43 100644 (file)
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -426,9 +426,16 @@ static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
 extern int power_supply_get_property(struct power_supply *psy,
                            enum power_supply_property psp,
                            union power_supply_propval *val);
+#if IS_ENABLED(CONFIG_POWER_SUPPLY)
 extern int power_supply_set_property(struct power_supply *psy,
                            enum power_supply_property psp,
                            const union power_supply_propval *val);
+#else
+static inline int power_supply_set_property(struct power_supply *psy,
+                           enum power_supply_property psp,
+                           const union power_supply_propval *val)
+{ return 0; }
+#endif
 extern int power_supply_property_is_writeable(struct power_supply *psy,
                                        enum power_supply_property psp);
 extern void power_supply_external_power_changed(struct power_supply *psy);