From: Gregory Herrero <gregory.herrero@xxxxxxxxx> If an interrupt rises during hibernation process, dwc2 will assert interrupt line to interrupt controller. If interrupt is level sensitive, interrupt handler will be called in a loop because dwc2 will not be able to clear it while controller is hibernated. Thus, clear all controller interrupts before hibernation entry. Signed-off-by: Gregory Herrero <gregory.herrero@xxxxxxxxx> Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@xxxxxxxxx> Tested-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx> --- drivers/usb/dwc2/core.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index c5e0a45..bf5e951 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -398,6 +398,12 @@ int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg) } } + /* + * Clear any pending interrupts since dwc2 will not be able to + * clear them after entering hibernation. + */ + dwc2_writel(0xffffffff, hsotg->regs + GINTSTS); + /* Put the controller in low power state */ pcgcctl = dwc2_readl(hsotg->regs + PCGCTL); -- 2.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
