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Commit 7ababa92 authored by Gregory Herrero's avatar Gregory Herrero Committed by Felipe Balbi
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usb: dwc2: gadget: prevent new request submission during suspend 



If usb controller is in partial power down, any write to registers may
cause unpredictable behavior.
Thus, prevent any new request submission once controller is in partial
power down.

Acked-by: default avatarJohn Youn <johnyoun@synopsys.com>
Signed-off-by: default avatarGregory Herrero <gregory.herrero@intel.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 9e779778

drivers/usb/dwc2/gadget.c

+7 −0
Original line number Diff line number Diff line
@@ -790,6 +790,13 @@ static int s3c_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req, 
		ep->name, req, req->length, req->buf, req->no_interrupt,

		req->zero, req->short_not_ok);



	/* Prevent new request submission when controller is suspended */

	if (hs->lx_state == DWC2_L2) {

		dev_dbg(hs->dev, "%s: don't submit request while suspended\n",

				__func__);

		return -EAGAIN;

	}



	/* initialise status of the request */

	INIT_LIST_HEAD(&hs_req->queue);

	req->actual = 0;