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From: Jamin Lin <jamin_lin@aspeedtech.com>
To: "berrange@redhat.com" <berrange@redhat.com>,
	"junjie.cao@linux.dev" <junjie.cao@linux.dev>,
	"kraxel@redhat.com" <kraxel@redhat.com>,
	"marcandre.lureau@redhat.com" <marcandre.lureau@redhat.com>,
	"clg@kaod.org" <clg@kaod.org>,
	"junjie.cao@intel.com" <junjie.cao@intel.com>,
	"Pierrick Bouvier" <pierrick.bouvier@oss.qualcomm.com>,
	"Peter Maydell" <peter.maydell@linaro.org>,
	"Kane Chen" <kane_chen@aspeedtech.com>,
	"Philippe Mathieu-Daudé" <philmd@oss.qualcomm.com>,
	"Tyrone Ting" <kfting@nuvoton.com>,
	"Hao Wu" <wuhaotsh@google.com>, "Zhao Liu" <zhao1.liu@intel.com>,
	"Richard Henderson" <richard.henderson@linaro.org>,
	"Helge Deller" <deller@gmx.de>,
	"Stefano Stabellini" <sstabellini@kernel.org>,
	"Anthony PERARD" <anthony@xenproject.org>,
	"Edgar E. Iglesias" <edgar.iglesias@gmail.com>,
	"open list:All patches CC here" <qemu-devel@nongnu.org>,
	"open list:ASPEED BMCs" <qemu-arm@nongnu.org>,
	"open list:X86 Xen CPUs" <xen-devel@lists.xenproject.org>
Cc: Jamin Lin <jamin_lin@aspeedtech.com>, Troy Lee <troy_lee@aspeedtech.com>
Subject: [PATCH v9 07/19] hw/usb/xen-usb: Do not insert an automatic hub
Date: Tue, 10 Nov 2026 07:28:29 +0000	[thread overview]
Message-ID: <20261110072818.2883349-8-jamin_lin@aspeedtech.com> (raw)
In-Reply-To: <20261110072818.2883349-1-jamin_lin@aspeedtech.com>

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@redhat.com>
Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 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


  parent reply	other threads:[~2026-11-10  7:29 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-10  7:28 [PATCH v9 00/19] hw/usb: Add a usbredir server transport Jamin Lin
2026-11-10  7:28 ` [PATCH v9 01/19] hw/usb/bus: Add an auto-hub flag to the USB bus Jamin Lin
2026-11-10  7:28 ` [PATCH v9 02/19] hw/usb/hcd-xhci: Add an auto-hub property and leave it off Jamin Lin
2026-11-10  7:28 ` [PATCH v9 03/19] hw/usb/hcd-ehci: " Jamin Lin
2026-11-10  7:28 ` [PATCH v9 04/19] hw/usb/hcd-uhci: " Jamin Lin
2026-11-10  7:28 ` [PATCH v9 05/19] hw/usb/hcd-ohci: " Jamin Lin
2026-11-10  7:28 ` [PATCH v9 06/19] hw/usb/hcd-dwc2: " Jamin Lin
2026-11-10  7:28 ` Jamin Lin [this message]
2026-11-10  7:28 ` [PATCH v9 08/19] hw/arm/npcm7xx: Keep the automatic hub Jamin Lin
2026-11-10  7:28 ` [PATCH v9 09/19] hw/usb/bus: Turn off the automatic hub by default Jamin Lin
2026-11-10  7:28 ` [PATCH v9 10/19] docs/system/devices/usb: Note the automatic hub change Jamin Lin
2026-11-10  7:28 ` [PATCH v9 11/19] hw/usb/redirect-server: Add a usbredir server device Jamin Lin
2026-11-10  7:28 ` [PATCH v9 12/19] hw/usb/redirect-server: Connect usbredirparser to a chardev Jamin Lin
2026-11-10  7:28 ` [PATCH v9 13/19] hw/usb/redirect-server: Announce the exported device Jamin Lin
2026-11-10  7:28 ` [PATCH v9 14/19] hw/usb/redirect-server: Implement control transfers Jamin Lin
2026-11-10  7:28 ` [PATCH v9 15/19] hw/usb/redirect-server: Send device and interface information Jamin Lin
2026-11-10  7:28 ` [PATCH v9 16/19] hw/usb/redirect-server: Implement bulk and interrupt transfers Jamin Lin
2026-11-10  7:28 ` [PATCH v9 17/19] hw/usb/redirect-server: Stream interrupt IN endpoints Jamin Lin
2026-11-10  7:28 ` [PATCH v9 18/19] hw/usb/redirect-server: Implement isochronous OUT transfers Jamin Lin
2026-11-10  7:28 ` [PATCH v9 19/19] hw/arm/aspeed: Enable the usbredir server transport Jamin Lin

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