Commit 40af177e authored Sep 14, 2015 by Bin Liu Committed by Felipe Balbi Sep 14, 2015

usb: musb: ensure in peripheral mode when checking session



The change ensures otg is not in a A- state when checking for VBUS in
peripheral mode.

musb_start() where VBUS checking is in can be called in many situations.
One example is in babble recovery routine, in which otg is transitioning
from A-HOST to A-WAIT-BCON, but VBUS discharge takes time, so
musb->is_active could be set to 1 due to this improper checking, then it
causes musb_bus_suspend() failed which leads to warning log message
flooding.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

parent e2ae0692

drivers/usb/musb/musb_core.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1051,6 +1051,7 @@ void musb_start(struct musb *musb)
		* (c) peripheral initiates, using SRP
		*/
		if (musb->port_mode != MUSB_PORT_MODE_HOST &&
		musb->xceiv->otg->state != OTG_STATE_A_WAIT_BCON &&
		(devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) {
		musb->is_active = 1;
		} else {