From 8ed8380b397fd70b1a2d70da7d059d2c94d0751a 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 9529e98399619..cb52bc41bfb81 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; -- 2.39.5