Commit 75f43ac3 authored by Artur Petrosyan's avatar Artur Petrosyan Committed by Greg Kroah-Hartman
Browse files

usb: dwc2: Allow exit partial power down in urb enqueue 



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.

Acked-by: default avatarMinas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: default avatarArtur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210408094542.685BAA0094@mailhost.synopsys.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4d4d99af

drivers/usb/dwc2/hcd.c

+7 −0
Original line number Diff line number Diff line
@@ -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;