[PATCH 03/15] usb: dwc2: Fix host mode hibernation exit with remote wakeup flow.

Artur Petrosyan
2021-04-15T05:39:51Z

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")
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
---
drivers/usb/dwc2/hcd.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index cda3f931195d..ff945c40ef8a 100644
--- 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;
--
2.25.1