Commit 9e95a66c authored Jan 16, 2018 by Minas Harutyunyan Committed by Felipe Balbi Feb 12, 2018

usb: dwc2: Add safety check for STSPHSERCVD intr



STSPHSERCVD (status phase received) interrupt should be
handled when EP0 is in DWC2_EP0_DATA_OUT state.

Sometimes STSPHSERCVD interrupt asserted , when EP0
is not in DATA_OUT state. Spurios interrupt.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

parent 201ec568

drivers/usb/dwc2/gadget.c

+7 −3

Original line number	Diff line number	Diff line
		@@ -2976,11 +2976,15 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
		if (ints & DXEPINT_STSPHSERCVD) {
		dev_dbg(hsotg->dev, "%s: StsPhseRcvd\n", __func__);

		/* Safety check EP0 state when STSPHSERCVD asserted */
		if (hsotg->ep0_state == DWC2_EP0_DATA_OUT) {
		/* Move to STATUS IN for DDMA */
		if (using_desc_dma(hsotg))
		dwc2_hsotg_ep0_zlp(hsotg, true);
		}

		}

		if (ints & DXEPINT_BACK2BACKSETUP)
		dev_dbg(hsotg->dev, "%s: B2BSetup/INEPNakEff\n", __func__);