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linux-4.9: Fix building of DWC3 module

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

This was affecting Lede in case of CONFIG_ALL_KMODS=y.

The patch is already scheduled for v4.12 and once it is backported to
4.9.y it must be removed from here.

Note this patch makes sense not only for ARC instead it fixes
a generic issue which may affect more arches and platforms thus
putting it in "generic/" folder.

Signed-off-by: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name> [patch rename]
This commit is contained in:
Alexey Brodkin 2017-05-02 13:36:19 +03:00 committed by Felix Fietkau
parent c13f943d2a
commit 2b27e62e74
1 changed files with 54 additions and 0 deletions
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54
target/linux/generic/patches-4.9/012-usb-Make-sure-usb-phy-of-gets-built-in.patch Normal file
View file

@ -0,0 +1,54 @@
From 3d6159640da9c9175d1ca42f151fc1a14caded59 Mon Sep 17 00:00:00 2001
From: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Date: Thu, 13 Apr 2017 15:33:34 +0300
Subject: [PATCH] usb: Make sure usb/phy/of gets built-in
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@synopsys.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Felix Fietkau <nbd@nbd.name>
Cc: Jeremy Kerr <jk@ozlabs.org>
Cc: linux-snps-arc@lists.infradead.org
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/Makefile b/drivers/Makefile
index 2eced9afba53..8f8bdc9e3d29 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -104,6 +104,7 @@ obj-$(CONFIG_USB_PHY) += usb/
obj-$(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/
--
2.11.0