4.14-stable review patch. If anyone has any objections, please let me know.
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From: Arnd Bergmann arnd@arndb.de
commit 3d54d10c6afed34fd45b852bf76f55e8da31d8ef upstream.
When EXTCON is a loadable module, mtu3 fails to link as built-in:
drivers/usb/mtu3/mtu3_plat.o: In function `mtu3_probe': mtu3_plat.c:(.text+0x690): undefined reference to `extcon_get_edev_by_phandle'
Add a Kconfig dependency to force mtu3 also to be a loadable module if extconn is, but still allow it to be built without extcon.
Fixes: d0ed062a8b75 ("usb: mtu3: dual-role mode support") Signed-off-by: Arnd Bergmann arnd@arndb.de Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/mtu3/Kconfig | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/usb/mtu3/Kconfig +++ b/drivers/usb/mtu3/Kconfig @@ -4,6 +4,7 @@ config USB_MTU3 tristate "MediaTek USB3 Dual Role controller" depends on EXTCON && (USB || USB_GADGET) && HAS_DMA depends on ARCH_MEDIATEK || COMPILE_TEST + depends on EXTCON || !EXTCON select USB_XHCI_MTK if USB_SUPPORT && USB_XHCI_HCD help Say Y or M here if your system runs on MediaTek SoCs with