linux-kernel - [PATCH] USB: xen-hcd: Traverse host/ when CONFIG_USB_XEN

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Date: Fri, 17 May 2024 11:43:52 +0000
From: John Ernberg <john.ernberg@...ia.se>
To: Juergen Gross <jgross@...e.com>, Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>
CC: "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, John Ernberg
	<john.ernberg@...ia.se>, "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: [PATCH] USB: xen-hcd: Traverse host/ when CONFIG_USB_XEN_HCD is
 selected

If no other USB HCDs are selected when compiling a small pure virutal
machine, the Xen HCD driver cannot be built.

Fix it by traversing down host/ if CONFIG_USB_XEN_HCD is selected.

Fixes: 494ed3997d75 ("usb: Introduce Xen pvUSB frontend (xen hcd)")
Cc: stable@...r.kernel.org # v5.17+
Signed-off-by: John Ernberg <john.ernberg@...ia.se>
---
 drivers/usb/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
index 3a9a0dd4be70..949eca0adebe 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_USB_R8A66597_HCD)	+= host/
 obj-$(CONFIG_USB_FSL_USB2)	+= host/
 obj-$(CONFIG_USB_FOTG210_HCD)	+= host/
 obj-$(CONFIG_USB_MAX3421_HCD)	+= host/
+obj-$(CONFIG_USB_XEN_HCD)	+= host/
 
 obj-$(CONFIG_USB_C67X00_HCD)	+= c67x00/
 
-- 
2.45.0