Re: [PATCH v2 03/15] usb: dwc2: Fix host mode hibernation exit with remote wakeup flow.

Minas Harutyunyan
2021-04-19T07:31:14Z

On 4/16/2021 4:47 PM, Artur Petrosyan wrote:
> 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>

Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>

> ---
> Changes in v2:
> - None
>
> 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;
>