Re: [PATCH v2 12/15] usb: dwc2: Add hibernation exiting flow by system resume

[Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>]

On 4/16/2021 4:48 PM, Artur Petrosyan wrote:
> Adds a new flow of exiting hibernation when PC is resumed
> from suspend state.
> 
> 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, 10 insertions(+)
> 
> diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
> index 92848629cc61..035d4911a3c3 100644
> --- a/drivers/usb/dwc2/hcd.c
> +++ b/drivers/usb/dwc2/hcd.c
> @@ -4470,6 +4470,16 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd)
>   		set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
>   		break;
>   	case DWC2_POWER_DOWN_PARAM_HIBERNATION:
> +		ret = dwc2_exit_hibernation(hsotg, 0, 0, 1);
> +		if (ret)
> +			dev_err(hsotg->dev, "exit hibernation failed.\n");
> +
> +		/*
> +		 * Set HW accessible bit before powering on the controller
> +		 * since an interrupt may rise.
> +		 */
> +		set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
> +		break;
>   	case DWC2_POWER_DOWN_PARAM_NONE:
>   		/*
>   		 * If not hibernation nor partial power down are supported,
>