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[PATCH v8 07/18] hw/usb/xen-usb: Do not insert an automatic hub
- To: "kraxel@xxxxxxxxxx" <kraxel@xxxxxxxxxx>, "marcandre.lureau@xxxxxxxxxx" <marcandre.lureau@xxxxxxxxxx>, "junjie.cao@xxxxxxxxx" <junjie.cao@xxxxxxxxx>, "junjie.cao@xxxxxxxxx" <junjie.cao@xxxxxxxxx>, "clg@xxxxxxxx" <clg@xxxxxxxx>, Pierrick Bouvier <pierrick.bouvier@xxxxxxxxxxxxxxxx>, Peter Maydell <peter.maydell@xxxxxxxxxx>, Kane Chen <kane_chen@xxxxxxxxxxxxxx>, Philippe Mathieu-Daudé <philmd@xxxxxxxxxxxxxxxx>, Tyrone Ting <kfting@xxxxxxxxxxx>, Hao Wu <wuhaotsh@xxxxxxxxxx>, Zhao Liu <zhao1.liu@xxxxxxxxx>, Richard Henderson <richard.henderson@xxxxxxxxxx>, Helge Deller <deller@xxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony@xxxxxxxxxxxxxx>, "Edgar E. Iglesias" <edgar.iglesias@xxxxxxxxx>, "open list:All patches CC here" <qemu-devel@xxxxxxxxxx>, "open list:ASPEED BMCs" <qemu-arm@xxxxxxxxxx>, "open list:X86 Xen CPUs" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Jamin Lin <jamin_lin@xxxxxxxxxxxxxx>
- Date: Mon, 2 Nov 2026 09:22:13 +0000
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- Cc: Jamin Lin <jamin_lin@xxxxxxxxxxxxxx>, Troy Lee <troy_lee@xxxxxxxxxxxxxx>
- Delivery-date: Mon, 02 Nov 2026 09:24:49 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHdaqukLyeSt+lGUU6ZEok9v0k5rQ==
- Thread-topic: [PATCH v8 07/18] hw/usb/xen-usb: Do not insert an automatic hub
xen-usb gives every device a port number. usb_claim_port() then uses
that port, and never reaches the automatic hub.
Set auto_hub to false. Every bus creator then sets the flag itself,
and usb_bus_new() can stop setting a default.
Suggested-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Signed-off-by: Jamin Lin <jamin_lin@xxxxxxxxxxxxxx>
---
hw/usb/xen-usb.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/hw/usb/xen-usb.c b/hw/usb/xen-usb.c
index caf9efbb77..5d1dbe6b1b 100644
--- a/hw/usb/xen-usb.c
+++ b/hw/usb/xen-usb.c
@@ -1023,6 +1023,7 @@ static void usbback_alloc(struct XenLegacyDevice *xendev)
usb_bus_new(&usbif->bus, sizeof(usbif->bus), &xen_usb_bus_ops,
DEVICE(xendev));
+ usbif->bus.auto_hub = false;
for (i = 0; i < USBBACK_MAXPORTS; i++) {
p = &(usbif->ports[i].port);
usb_register_port(&usbif->bus, p, usbif, i, &xen_usb_port_ops,
--
2.43.0
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