| Message ID | 20210413073708.ADFC6A0094@mailhost.synopsys.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2,01/12] usb: dwc2: Add device clock gating support functions | expand |
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 8a42675ab94e..31d6a1b87228 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -4597,6 +4597,14 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, "exit partial_power_down failed\n"); } + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_NONE && + hsotg->bus_suspended) { + if (dwc2_is_device_mode(hsotg)) + dwc2_gadget_exit_clock_gating(hsotg, 0); + else + dwc2_host_exit_clock_gating(hsotg, 0); + } + if (!ep) return -EINVAL;
When core is in clock gating state and an external hub is connected, upper layer sends URB enqueue request, which results in port reset issue. Added exit from clock gating state to avoid port reset issue and process upper layer request properly. Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com> --- Changes in v2: - None drivers/usb/dwc2/hcd.c | 8 ++++++++ 1 file changed, 8 insertions(+)