From 75f43ac3c1fd72e7349ef8e013fdbd1e36ced996 Mon Sep 17 00:00:00 2001 From: Artur Petrosyan Date: Thu, 8 Apr 2021 13:45:41 +0400 Subject: [PATCH] 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: Minas Harutyunyan Signed-off-by: Artur Petrosyan Link: https://lore.kernel.org/r/20210408094542.685BAA0094@mailhost.synopsys.com Signed-off-by: Greg Kroah-Hartman --- 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; -- 2.25.1