usb: dwc2: Update exit hibernation when port reset is asserted

No need to check for "DWC2_POWER_DOWN_PARAM_HIBERNATION" param
as "hsotg->hibernated" flag is already enough for exiting from
hibernation mode.

- Removes checking of "DWC2_POWER_DOWN_PARAM_HIBERNATION" param.

- For code readability Hibernation exit code moved after
debug message print.

- Added "dwc2_exit_hibernation()" function error checking.
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210416124651.51C8DA005C@mailhost.synopsys.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/dwc2/hcd.c

@@ -3668,9 +3668,17 @@ static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
 			break;
 
 		case USB_PORT_FEAT_RESET:
-			if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_HIBERNATION &&
-			    hsotg->hibernated)
-				dwc2_exit_hibernation(hsotg, 0, 1, 1);
+			dev_dbg(hsotg->dev,
+				"SetPortFeature - USB_PORT_FEAT_RESET\n");
+
+			hprt0 = dwc2_read_hprt0(hsotg);
+
+			if (hsotg->hibernated) {
+				retval = dwc2_exit_hibernation(hsotg, 0, 1, 1);
+				if (retval)
+					dev_err(hsotg->dev,
+						"exit hibernation failed\n");
+			}
 
 			if (hsotg->in_ppd) {
 				retval = dwc2_exit_partial_power_down(hsotg, 1,
@@ -3684,9 +3692,6 @@ static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
 			    DWC2_POWER_DOWN_PARAM_NONE && hsotg->bus_suspended)
 				dwc2_host_exit_clock_gating(hsotg, 0);
 
-			hprt0 = dwc2_read_hprt0(hsotg);
-			dev_dbg(hsotg->dev,
-				"SetPortFeature - USB_PORT_FEAT_RESET\n");
 			pcgctl = dwc2_readl(hsotg, PCGCTL);
 			pcgctl &= ~(PCGCTL_ENBL_SLEEP_GATING | PCGCTL_STOPPCLK);
 			dwc2_writel(hsotg, pcgctl, PCGCTL);