The DWC3 runtime suspend routine checks for the USB connected parameter to
determine if the controller can enter into a low power state. The
connected state is only set to false after receiving a disconnect event.
However, in the case of a device initiated disconnect (i.e. UDC unbind),
the controller is halted and a disconnect event is never generated. Set
the connected flag to false if issuing a device initiated disconnect to
allow the controller to be suspended.
Signed-off-by: Wesley Cheng <wcheng@xxxxxxxxxxxxxx>
---
drivers/usb/dwc3/gadget.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 5d879b7606d5..6364429b2122 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1995,6 +1995,11 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
unsigned long flags;
int ret;
+ if (pm_runtime_suspended(dwc->dev)) {
+ pm_request_resume(dwc->dev);
+ return 0;
+ }
+
is_on = !!is_on;
/*
@@ -2050,6 +2055,7 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
dwc->ev_buf->lpos = (dwc->ev_buf->lpos + count) %
dwc->ev_buf->length;
}
+ dwc->connected = false;
}
ret = dwc3_gadget_run_stop(dwc, is_on, false);
--
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