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 aford173@gmail.com 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.
Fixes: 0604160d8c0b ("usb: gadget: udc: renesas_usb3: Enhance role switch support") Cc: stable stable@vger.kernel.org Reviewed-by: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com Signed-off-by: Adam Ford aford173@gmail.com Link: https://lore.kernel.org/r/20220128223603.2362621-1-aford173@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/gadget/udc/renesas_usb3.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index 57d417a7c3e0..601829a6b4ba 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -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);