usb: dwc3: Simplify with dev_err_probe()

Common pattern of handling deferred probe can be simplified with
dev_err_probe(). Less code and the error value gets printed.
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210111135458.57084-1-andriy.shevchenko@linux.intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/dwc3/core.c

@@ -1126,11 +1126,8 @@ static int dwc3_core_get_phy(struct dwc3 *dwc)
 		ret = PTR_ERR(dwc->usb2_phy);
 		if (ret == -ENXIO || ret == -ENODEV) {
 			dwc->usb2_phy = NULL;
-		} else if (ret == -EPROBE_DEFER) {
-			return ret;
 		} else {
-			dev_err(dev, "no usb2 phy configured\n");
-			return ret;
+			return dev_err_probe(dev, ret, "no usb2 phy configured\n");
 		}
 	}
 
@@ -1138,11 +1135,8 @@ static int dwc3_core_get_phy(struct dwc3 *dwc)
 		ret = PTR_ERR(dwc->usb3_phy);
 		if (ret == -ENXIO || ret == -ENODEV) {
 			dwc->usb3_phy = NULL;
-		} else if (ret == -EPROBE_DEFER) {
-			return ret;
 		} else {
-			dev_err(dev, "no usb3 phy configured\n");
-			return ret;
+			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
 		}
 	}
 
@@ -1151,11 +1145,8 @@ static int dwc3_core_get_phy(struct dwc3 *dwc)
 		ret = PTR_ERR(dwc->usb2_generic_phy);
 		if (ret == -ENOSYS || ret == -ENODEV) {
 			dwc->usb2_generic_phy = NULL;
-		} else if (ret == -EPROBE_DEFER) {
-			return ret;
 		} else {
-			dev_err(dev, "no usb2 phy configured\n");
-			return ret;
+			return dev_err_probe(dev, ret, "no usb2 phy configured\n");
 		}
 	}
 
@@ -1164,11 +1155,8 @@ static int dwc3_core_get_phy(struct dwc3 *dwc)
 		ret = PTR_ERR(dwc->usb3_generic_phy);
 		if (ret == -ENOSYS || ret == -ENODEV) {
 			dwc->usb3_generic_phy = NULL;
-		} else if (ret == -EPROBE_DEFER) {
-			return ret;
 		} else {
-			dev_err(dev, "no usb3 phy configured\n");
-			return ret;
+			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
 		}
 	}
 
@@ -1190,11 +1178,8 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
 		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
 
 		ret = dwc3_gadget_init(dwc);
-		if (ret) {
-			if (ret != -EPROBE_DEFER)
-				dev_err(dev, "failed to initialize gadget\n");
-			return ret;
-		}
+		if (ret)
+			return dev_err_probe(dev, ret, "failed to initialize gadget\n");
 		break;
 	case USB_DR_MODE_HOST:
 		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
@@ -1205,20 +1190,14 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
 		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
 
 		ret = dwc3_host_init(dwc);
-		if (ret) {
-			if (ret != -EPROBE_DEFER)
-				dev_err(dev, "failed to initialize host\n");
-			return ret;
-		}
+		if (ret)
+			return dev_err_probe(dev, ret, "failed to initialize host\n");
 		break;
 	case USB_DR_MODE_OTG:
 		INIT_WORK(&dwc->drd_work, __dwc3_set_mode);
 		ret = dwc3_drd_init(dwc);
-		if (ret) {
-			if (ret != -EPROBE_DEFER)
-				dev_err(dev, "failed to initialize dual-role\n");
-			return ret;
-		}
+		if (ret)
+			return dev_err_probe(dev, ret, "failed to initialize dual-role\n");
 		break;
 	default:
 		dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode);
@@ -1555,8 +1534,7 @@ static int dwc3_probe(struct platform_device *pdev)
 
 	ret = dwc3_core_init(dwc);
 	if (ret) {
-		if (ret != -EPROBE_DEFER)
-			dev_err(dev, "failed to initialize core: %d\n", ret);
+		dev_err_probe(dev, ret, "failed to initialize core\n");
 		goto err4;
 	}