can: sja1000: platform: use devm_* APIs

Simplify probe and remove functions by converting most of the resources
to use devm_* APIs.

Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Tested-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/sja1000/sja1000_platform.c b/drivers/net/can/sja1000/sja1000_platform.c
index 943df64..50ca273 100644 (file)
--- a/drivers/net/can/sja1000/sja1000_platform.c
+++ b/drivers/net/can/sja1000/sja1000_platform.c
@@ -78,34 +78,26 @@ static int sp_probe(struct platform_device *pdev)
        pdata = dev_get_platdata(&pdev->dev);
        if (!pdata) {
                dev_err(&pdev->dev, "No platform data provided!\n");
-               err = -ENODEV;
-               goto exit;
+               return -ENODEV;
        }
 
        res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-       if (!res_mem || !res_irq) {
-               err = -ENODEV;
-               goto exit;
-       }
+       if (!res_mem || !res_irq)
+               return -ENODEV;
 
-       if (!request_mem_region(res_mem->start, resource_size(res_mem),
-                               DRV_NAME)) {
-               err = -EBUSY;
-               goto exit;
-       }
+       if (!devm_request_mem_region(&pdev->dev, res_mem->start,
+                                    resource_size(res_mem), DRV_NAME))
+               return -EBUSY;
 
-       addr = ioremap_nocache(res_mem->start, resource_size(res_mem));
-       if (!addr) {
-               err = -ENOMEM;
-               goto exit_release;
-       }
+       addr = devm_ioremap_nocache(&pdev->dev, res_mem->start,
+                                   resource_size(res_mem));
+       if (!addr)
+               return -ENOMEM;
 
        dev = alloc_sja1000dev(0);
-       if (!dev) {
-               err = -ENOMEM;
-               goto exit_iounmap;
-       }
+       if (!dev)
+               return -ENOMEM;
        priv = netdev_priv(dev);
 
        dev->irq = res_irq->start;
@@ -150,28 +142,14 @@ static int sp_probe(struct platform_device *pdev)
 
  exit_free:
        free_sja1000dev(dev);
- exit_iounmap:
-       iounmap(addr);
- exit_release:
-       release_mem_region(res_mem->start, resource_size(res_mem));
- exit:
        return err;
 }
 
 static int sp_remove(struct platform_device *pdev)
 {
        struct net_device *dev = platform_get_drvdata(pdev);
-       struct sja1000_priv *priv = netdev_priv(dev);
-       struct resource *res;
 
        unregister_sja1000dev(dev);
-
-       if (priv->reg_base)
-               iounmap(priv->reg_base);
-
-       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       release_mem_region(res->start, resource_size(res));
-
        free_sja1000dev(dev);
 
        return 0;