USB: dwc3: clean up core init error handling

Clean up the core init error handling by using descriptive names for the
error labels and releasing resourcing in reverse order consistently.
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20230404072524.19014-9-johan+linaro@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/dwc3/core.c

@@ -1018,7 +1018,7 @@ static int dwc3_core_init(struct dwc3 *dwc)
 
 	ret = dwc3_phy_setup(dwc);
 	if (ret)
-		goto err0;
+		return ret;
 
 	if (!dwc->ulpi_ready) {
 		ret = dwc3_core_ulpi_init(dwc);
@@ -1027,7 +1027,7 @@ static int dwc3_core_init(struct dwc3 *dwc)
 				dwc3_core_soft_reset(dwc);
 				ret = -EPROBE_DEFER;
 			}
-			goto err0;
+			return ret;
 		}
 		dwc->ulpi_ready = true;
 	}
@@ -1035,7 +1035,7 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	if (!dwc->phys_ready) {
 		ret = dwc3_core_get_phy(dwc);
 		if (ret)
-			goto err0a;
+			goto err_exit_ulpi;
 		dwc->phys_ready = true;
 	}
 
@@ -1052,7 +1052,7 @@ static int dwc3_core_init(struct dwc3 *dwc)
 
 	ret = dwc3_core_soft_reset(dwc);
 	if (ret)
-		goto err1;
+		goto err_exit_usb3_phy;
 
 	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD &&
 	    !DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) {
@@ -1087,16 +1087,16 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	usb_phy_set_suspend(dwc->usb3_phy, 0);
 	ret = phy_power_on(dwc->usb2_generic_phy);
 	if (ret < 0)
-		goto err2;
+		goto err_suspend_usb3_phy;
 
 	ret = phy_power_on(dwc->usb3_generic_phy);
 	if (ret < 0)
-		goto err3;
+		goto err_power_off_usb2_phy;
 
 	ret = dwc3_event_buffers_setup(dwc);
 	if (ret) {
 		dev_err(dwc->dev, "failed to setup event buffers\n");
-		goto err4;
+		goto err_power_off_usb3_phy;
 	}
 
 	/*
@@ -1213,27 +1213,23 @@ static int dwc3_core_init(struct dwc3 *dwc)
 
 	return 0;
 
-err4:
+err_power_off_usb3_phy:
 	phy_power_off(dwc->usb3_generic_phy);
-
-err3:
+err_power_off_usb2_phy:
 	phy_power_off(dwc->usb2_generic_phy);
-
-err2:
-	usb_phy_set_suspend(dwc->usb2_phy, 1);
+err_suspend_usb3_phy:
 	usb_phy_set_suspend(dwc->usb3_phy, 1);
-
-err1:
+	usb_phy_set_suspend(dwc->usb2_phy, 1);
+err_exit_usb3_phy:
 	phy_exit(dwc->usb3_generic_phy);
 err_exit_usb2_phy:
 	phy_exit(dwc->usb2_generic_phy);
 err_shutdown_usb3_phy:
 	usb_phy_shutdown(dwc->usb3_phy);
 	usb_phy_shutdown(dwc->usb2_phy);
-err0a:
+err_exit_ulpi:
 	dwc3_ulpi_exit(dwc);
 
-err0:
 	return ret;
 }