linux-kernel - [PATCH] usb: gadget: udc: fix snps_udc

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Date:   Mon, 11 Sep 2017 09:24:15 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     USB list <linux-usb@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>
Cc:     Fengguang Wu <fengguang.wu@...el.com>
Subject: [PATCH] usb: gadget: udc: fix snps_udc_plat.c build errors

From: Randy Dunlap <rdunlap@...radead.org>

Fix build errors that happen when CONFIG_EXTCON=m and
CONFIG_USB_SNP_UDC_PLAT=y by preventing that combination in Kconfig.
CONFIG_EXTCON can still be disabled or enabled for this driver since
<linux/extcon.h> has stubs for the disabled case, but if CONFIG_EXTCON=m,
USB_SNP_UDC_PLAT is restricted to m or n (cannot be builtin).

drivers/built-in.o: In function `udc_plat_remove':
snps_udc_plat.c:(.text+0x2c4060): undefined reference to `extcon_unregister_notifier'
drivers/built-in.o: In function `udc_plat_probe':
snps_udc_plat.c:(.text+0x2c438c): undefined reference to `extcon_get_edev_by_phandle'
snps_udc_plat.c:(.text+0x2c43f2): undefined reference to `extcon_register_notifier'
snps_udc_plat.c:(.text+0x2c4416): undefined reference to `extcon_get_state'
snps_udc_plat.c:(.text+0x2c44f7): undefined reference to `extcon_unregister_notifier'

Reported-by: kbuild test robot <fengguang.wu@...el.com>
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
---
 drivers/usb/gadget/udc/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- lnx-413.orig/drivers/usb/gadget/udc/Kconfig
+++ lnx-413/drivers/usb/gadget/udc/Kconfig
@@ -273,6 +273,7 @@ config USB_SNP_CORE
 config USB_SNP_UDC_PLAT
 	tristate "Synopsys USB 2.0 Device controller"
 	depends on USB_GADGET && OF && HAS_DMA
+	depends on EXTCON || EXTCON=n
 	select USB_GADGET_DUALSPEED
 	select USB_SNP_CORE
 	default ARCH_BCM_IPROC