[PATCH v3 1/2] usb: gadget: legacy gadgets are optional

From: Romain Izard
Date: Fri Mar 10 2017 - 08:12:12 EST

With commit bc49d1d17dcf ("usb: gadget: don't couple configfs to legacy
gadgets"),it is possible to build a modular kernel with both built-in
configfs support and modular legacy gadget drivers.

But when building a kernel without modules, it is also necessary to be
able to build with configfs but without any legacy gadget driver. This
was a possible configuration when the USB_CONFIGFS was a part of the
choice options, but not anymore.

Mark the choice for legacy gadget drivers as optional restores this.

Fixes: bc49d1d17dcf ("usb: gadget: don't couple configfs to legacy gadgets")
Cc: <stable@xxxxxxxxxxxxxxx> # 4.9+
Signed-off-by: Romain Izard <romain.izard.pro@xxxxxxxxx>
Changes in v2:
- Reword description
Changes in v3:
- Remove comment changes

drivers/usb/gadget/Kconfig | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 8ad203296079..f3ee80ece682 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -460,6 +460,7 @@ config USB_CONFIGFS_F_TCM
tristate "USB Gadget Drivers"
default USB_ETH
+ optional
A Linux "Gadget Driver" talks to the USB Peripheral Controller
driver through the abstract "gadget" API. Some other operating