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usb: gadget: legacy gadgets are optional 

With commit bc49d1d17d ("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: bc49d1d17d ("usb: gadget: don't couple configfs to legacy gadgets")
Cc: <stable@vger.kernel.org> # 4.9+
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Romain Izard 2017-03-10 14:11:41 +01:00 committed by Felipe Balbi
parent af771d731b
commit 6e253d0fbc
1 changed files with 1 additions and 0 deletions
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drivers/usb/gadget/Kconfig
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@ -460,6 +460,7 @@ config USB_CONFIGFS_F_TCM
choice
tristate "USB Gadget Drivers"
default USB_ETH
optional
help
A Linux "Gadget Driver" talks to the USB Peripheral Controller
driver through the abstract "gadget" API. Some other operating