5.4-stable review patch. If anyone has any objections, please let me know.
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From: Drew Hamilton drew.hamilton@zetier.com
commit 67a59f82196c8c4f50c83329f0577acfb1349b50 upstream.
When unplugging the USB cable or disconnecting a gadget in usb peripheral mode with echo "" > /sys/kernel/config/usb_gadget/<your_gadget>/UDC, /sys/class/udc/musb-hdrc.0/state does not change from USB_STATE_CONFIGURED.
Testing on dwc2/3 shows they both update the state to USB_STATE_NOTATTACHED.
Add calls to usb_gadget_set_state in musb_g_disconnect and musb_gadget_stop to fix both cases.
Fixes: 49401f4169c0 ("usb: gadget: introduce gadget state tracking") Cc: stable@vger.kernel.org Co-authored-by: Yehowshua Immanuel yehowshua.immanuel@twosixtech.com Signed-off-by: Yehowshua Immanuel yehowshua.immanuel@twosixtech.com Signed-off-by: Drew Hamilton drew.hamilton@zetier.com Link: https://lore.kernel.org/r/20250701154126.8543-1-drew.hamilton@zetier.com [ replaced musb_set_state() call with direct otg state assignment ] Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/musb/musb_gadget.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1910,6 +1910,7 @@ static int musb_gadget_stop(struct usb_g * gadget driver here and have everything work; * that currently misbehaves. */ + usb_gadget_set_state(g, USB_STATE_NOTATTACHED);
/* Force check of devctl register for PM runtime */ schedule_delayed_work(&musb->irq_work, 0); @@ -2018,6 +2019,7 @@ void musb_g_disconnect(struct musb *musb case OTG_STATE_B_PERIPHERAL: case OTG_STATE_B_IDLE: musb->xceiv->otg->state = OTG_STATE_B_IDLE; + usb_gadget_set_state(&musb->g, USB_STATE_NOTATTACHED); break; case OTG_STATE_B_SRP_INIT: break;