Messages in this thread Patch in this message | | | From | Minas Harutyunyan <> | Subject | Re: [PATCH v3 10/14] usb: dwc2: Allow exit partial power down in urb enqueue | Date | Thu, 8 Apr 2021 13:40:17 +0000 |
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On 4/8/2021 1:45 PM, Artur Petrosyan wrote: > When core is in partial power down state and an external > hub is connected, upper layer sends URB enqueue request, > which results in port reset issue. > > Added exit from partial power down state to avoid port > reset issue and process upper layer request correctly. > > Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
> --- > Changes in v3: > - None > Changes in v2: > - None > > drivers/usb/dwc2/hcd.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c > index 9529e9839961..cb52bc41bfb8 100644 > --- a/drivers/usb/dwc2/hcd.c > +++ b/drivers/usb/dwc2/hcd.c > @@ -4633,6 +4633,13 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, > dwc2_dump_urb_info(hcd, urb, "urb_enqueue"); > } > > + if (hsotg->in_ppd) { > + retval = dwc2_exit_partial_power_down(hsotg, 0, true); > + if (retval) > + dev_err(hsotg->dev, > + "exit partial_power_down failed\n"); > + } > + > if (!ep) > return -EINVAL; > >
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