linux-kernel - [PATCH 3.2 41/59] usb: Make sure usb/phy/of gets built-in

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Date:   Fri, 18 Aug 2017 14:13:13 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, linux-snps-arc@...ts.infradead.org,
        "Masahiro Yamada" <yamada.masahiro@...ionext.com>,
        "Alexey Brodkin" <abrodkin@...opsys.com>,
        "Alexey Brodkin" <Alexey.Brodkin@...opsys.com>,
        "Felipe Balbi" <balbi@...nel.org>,
        "Thomas Gleixner" <tglx@...utronix.de>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        "Jeremy Kerr" <jk@...abs.org>,
        "Nicolas Pitre" <nicolas.pitre@...aro.org>,
        "Felix Fietkau" <nbd@....name>,
        "Geert Uytterhoeven" <geert+renesas@...der.be>
Subject: [PATCH 3.2 41/59] usb: Make sure usb/phy/of gets built-in

3.2.92-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Alexey Brodkin <Alexey.Brodkin@...opsys.com>

commit 3d6159640da9c9175d1ca42f151fc1a14caded59 upstream.

DWC3 driver uses of_usb_get_phy_mode() which is
implemented in drivers/usb/phy/of.c and in bare minimal
configuration it might not be pulled in kernel binary.

In case of ARC or ARM this could be easily reproduced with
"allnodefconfig" +CONFIG_USB=m +CONFIG_USB_DWC3=m.

On building all ends-up with:
---------------------->8------------------
  Kernel: arch/arm/boot/Image is ready
  Kernel: arch/arm/boot/zImage is ready
  Building modules, stage 2.
  MODPOST 5 modules
ERROR: "of_usb_get_phy_mode" [drivers/usb/dwc3/dwc3.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2
---------------------->8------------------

Signed-off-by: Alexey Brodkin <abrodkin@...opsys.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Nicolas Pitre <nicolas.pitre@...aro.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Felipe Balbi <balbi@...nel.org>
Cc: Felix Fietkau <nbd@....name>
Cc: Jeremy Kerr <jk@...abs.org>
Cc: linux-snps-arc@...ts.infradead.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/Makefile | 1 +
 1 file changed, 1 insertion(+)

--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -73,6 +73,7 @@ obj-$(CONFIG_USB_OTG_UTILS)	+= usb/
 obj-$(CONFIG_USB)		+= usb/
 obj-$(CONFIG_PCI)		+= usb/
 obj-$(CONFIG_USB_GADGET)	+= usb/
+obj-$(CONFIG_OF)		+= usb/
 obj-$(CONFIG_SERIO)		+= input/serio/
 obj-$(CONFIG_GAMEPORT)		+= input/gameport/
 obj-$(CONFIG_INPUT)		+= input/