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 by setting "hibernated" argument of
ohci_resume().
Signed-off-by: Guiting Shen <[email protected]>
Reviewed-by: Alan Stern <[email protected]>
---
drivers/usb/host/ohci-at91.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index 533537ef3c21..360680769494 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -673,7 +673,13 @@ ohci_hcd_at91_drv_resume(struct device *dev)
else
at91_start_clock(ohci_at91);
- ohci_resume(hcd, false);
+ /*
+ * According to the comment in ohci_hcd_at91_drv_suspend()
+ * we need to do a reset if the 48Mhz clock was stopped,
+ * that is, if ohci_at91->wakeup is clear. Tell ohci_resume()
+ * to reset in this case by setting its "hibernated" flag.
+ */
+ ohci_resume(hcd, !ohci_at91->wakeup);
return 0;
}
--
2.25.1