Commit 5160d687 authored by Artur Petrosyan's avatar Artur Petrosyan Committed by Greg Kroah-Hartman
Browse files

usb: dwc2: Clear GINTSTS_RESTOREDONE bit after restore is generated. 



When hibernation exit is performed the dwc2_hib_restore_common()
function is called. In that function we wait until GINTSTS_RESTOREDONE
bit is set. However, after the setting of that bit we get a lot of
(dwc2_hsotg_irq:) interrupts which indicates that (GINTSTS.RstrDoneInt)
restore done interrupt is asserted.

To avoid restore done interrupt storm after restore is generated
clear GINTSTS_RESTOREDONE bit in GINTSTS register.

Acked-by: default avatarMinas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: default avatarArtur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210416124739.D6269A005D@mailhost.synopsys.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 238f65ae

drivers/usb/dwc2/core.c

+6 −0
Original line number Diff line number Diff line
@@ -299,6 +299,12 @@ void dwc2_hib_restore_common(struct dwc2_hsotg *hsotg, int rem_wakeup, 
			__func__);

	} else {

		dev_dbg(hsotg->dev, "restore done  generated here\n");



		/*

		 * To avoid restore done interrupt storm after restore is

		 * generated clear GINTSTS_RESTOREDONE bit.

		 */

		dwc2_writel(hsotg, GINTSTS_RESTOREDONE, GINTSTS);

	}

}