usb: dwc2: Fix host mode hibernation exit with remote wakeup flow.

Added setting "port_connect_status_change" flag to "1" in order
to re-enumerate, because after exit from hibernation port
connection status is not detected.

Fixes: c5c403dc4336 ("usb: dwc2: Add host/device hibernation functions")
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210416124707.5EEC2A005D@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index cda3f93..ff945c4 100644 (file)
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -5650,7 +5650,15 @@ int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup,
                return ret;
        }
 
-       dwc2_hcd_rem_wakeup(hsotg);
+       if (rem_wakeup) {
+               dwc2_hcd_rem_wakeup(hsotg);
+               /*
+                * Change "port_connect_status_change" flag to re-enumerate,
+                * because after exit from hibernation port connection status
+                * is not detected.
+                */
+               hsotg->flags.b.port_connect_status_change = 1;
+       }
 
        hsotg->hibernated = 0;
        hsotg->bus_suspended = 0;