patch "usb: gadget: udc: renesas_usb3: Fix host to USB_ROLE_NONE transition" added to usb-linus

This is a note to let you know that I've just added the patch titled

usb: gadget: udc: renesas_usb3: Fix host to USB_ROLE_NONE transition

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 459702eea6132888b5c5b64c0e9c626da4ec2493 Mon Sep 17 00:00:00 2001
From: Adam Ford <[email protected]>
Date: Fri, 28 Jan 2022 16:36:03 -0600
Subject: usb: gadget: udc: renesas_usb3: Fix host to USB_ROLE_NONE transition

The support the external role switch a variety of situations were addressed, but the transition from USB_ROLE_HOST to USB_ROLE_NONE leaves the host up which can cause some error messages when switching from host to none, to gadget, to none, and then back to host again.

xhci-hcd ee000000.usb: Abort failed to stop command ring: -110 xhci-hcd ee000000.usb: xHCI host controller not responding, assume dead xhci-hcd ee000000.usb: HC died; cleaning up
usb 4-1: device not accepting address 6, error -108
usb usb4-port1: couldn't allocate usb_device

After this happens it will not act as a host again.
Fix this by releasing the host mode when transitioning to USB_ROLE_NONE.

---
 drivers/usb/gadget/udc/renesas_usb3.c | 2 ++
 1 file changed, 2 insertions(+)

index 57d417a7c3e0..601829a6b4ba 100644
@@ -2378,6 +2378,8 @@ static void handle_ext_role_switch_states(struct device *dev,
 	switch (role) {
 	case USB_ROLE_NONE:
 		usb3->connection_state = USB_ROLE_NONE;
+		if (cur_role == USB_ROLE_HOST)
+			device_release_driver(host);
 		if (usb3->driver)
 			usb3_disconnect(usb3);
 		usb3_vbus_out(usb3, false);

2.35.1