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 <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210408094542.685BAA0094@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 9529e9839961978c037f6a8b18f5950cac8d3db0..cb52bc41bfb81eb8e9e8dd7143e8ac350253bb04 100644 (file)
--- 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;