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usb: musb: fix gadget state on disconnect

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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: 49401f4169 ("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>
This commit is contained in:
Drew Hamilton 2025-07-01 11:41:26 -04:00 • committed by Greg Kroah-Hartman
commit 4ea93e0eb9
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/musb/musb_gadget.c
View file

@ -1910,6 +1910,7 @@ static int musb_gadget_stop(struct usb_gadget *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;