Simplifies the probe function by a bit and allows removing the _remove
function such that devm now handles all cleanup.

printk gets converted to dev_err as np is now gone.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/net/ethernet/ibm/emac/zmii.c | 26 ++++----------------------
 1 file changed, 4 insertions(+), 22 deletions(-)

diff --git a/drivers/net/ethernet/ibm/emac/zmii.c b/drivers/net/ethernet/ibm/emac/zmii.c
index cb57c960b34d..69ca6065de1c 100644
--- a/drivers/net/ethernet/ibm/emac/zmii.c
+++ b/drivers/net/ethernet/ibm/emac/zmii.c
@@ -232,9 +232,7 @@ void *zmii_dump_regs(struct platform_device *ofdev, void *buf)
 
 static int zmii_probe(struct platform_device *ofdev)
 {
-	struct device_node *np = ofdev->dev.of_node;
 	struct zmii_instance *dev;
-	struct resource regs;
 	int err;
 
 	dev = devm_kzalloc(&ofdev->dev, sizeof(struct zmii_instance),
@@ -249,16 +247,10 @@ static int zmii_probe(struct platform_device *ofdev)
 	dev->ofdev = ofdev;
 	dev->mode = PHY_INTERFACE_MODE_NA;
 
-	if (of_address_to_resource(np, 0, &regs)) {
-		printk(KERN_ERR "%pOF: Can't get registers address\n", np);
-		return -ENXIO;
-	}
-
-	dev->base = (struct zmii_regs __iomem *)ioremap(regs.start,
-						sizeof(struct zmii_regs));
-	if (!dev->base) {
-		printk(KERN_ERR "%pOF: Can't map device registers!\n", np);
-		return -ENOMEM;
+	dev->base = devm_platform_ioremap_resource(ofdev, 0);
+	if (IS_ERR(dev->base)) {
+		dev_err(&ofdev->dev, "can't map device registers");
+		return PTR_ERR(dev->base);
 	}
 
 	/* We may need FER value for autodetection later */
@@ -274,15 +266,6 @@ static int zmii_probe(struct platform_device *ofdev)
 	return 0;
 }
 
-static void zmii_remove(struct platform_device *ofdev)
-{
-	struct zmii_instance *dev = platform_get_drvdata(ofdev);
-
-	WARN_ON(dev->users != 0);
-
-	iounmap(dev->base);
-}
-
 static const struct of_device_id zmii_match[] =
 {
 	{
@@ -301,7 +284,6 @@ static struct platform_driver zmii_driver = {
 		.of_match_table = zmii_match,
 	},
 	.probe = zmii_probe,
-	.remove = zmii_remove,
 };
 
 int __init zmii_init(void)
-- 
2.47.0