The ohci_hcd_at91_drv_suspend() sets ohci->rh_state to OHCI_RH_HALTED when suspend which will let the ohci_irq() skip the interrupt after resume. And nobody to handle this interrupt. According to the comment in ohci_hcd_at91_drv_suspend(), it need to reset when resume from suspend(MEM) to fix. Signed-off-by: Guiting Shen <aarongt.shen@xxxxxxxxx> --- drivers/usb/host/ohci-at91.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index b9ce8d80f20b..1a0356d9ea15 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -672,7 +672,12 @@ ohci_hcd_at91_drv_resume(struct device *dev) else at91_start_clock(ohci_at91); - ohci_resume(hcd, false); + /* + * need to reset according to the comment of suspend routine, + * otherwise the ohci_irq would skip the interrupt if ohci_state + * was OHCI_RH_HALTED. + */ + ohci_resume(hcd, !ohci_at91->wakeup); return 0; } -- 2.25.1
