On Mon, Feb 15, 2021 at 11:38:58AM +0900, Daehwan Jung wrote:
> It seems pm_runtime_put calls runtime_idle callback not runtime_suspend callback.
How is this fact related to your patch?
> It's better to use pm_runtime_put_sync_suspend to allow DWC3 runtime suspend.
Why do you think it is better? The advantage of pm_runtime_put is that
it allows the suspend to occur at a later time in a workqueue thread, so
the caller doesn't have to wait for the device to go into suspend.
Alan Stern
> Signed-off-by: Daehwan Jung <dh10.jung@xxxxxxxxxxx>
> ---
> drivers/usb/dwc3/gadget.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> index aebcf8e..4a4b93b 100644
> --- a/drivers/usb/dwc3/gadget.c
> +++ b/drivers/usb/dwc3/gadget.c
> @@ -2229,7 +2229,7 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
> */
> ret = pm_runtime_get_sync(dwc->dev);
> if (!ret || ret < 0) {
> - pm_runtime_put(dwc->dev);
> + pm_runtime_put_sync_suspend(dwc->dev);
> return 0;
> }
>
> --
> 2.7.4
>
