make use of devm function in the mcb-pci driver

Replaced ioremap with devm_ioremap and request_mem_region with devm_request_mem_region. This makes the code much more cleaner.

Signed-off-by Andreas Werner <[email protected]>

---
 drivers/mcb/mcb-pci.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

drivers/mcb/mcb-pci.c +7 -12

index 67d5e7d..99dd9db 100644
@@ -55,19 +55,20 @@ static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto out_disable;
 	}
 
-	res = request_mem_region(priv->mapbase, CHAM_HEADER_SIZE,
-				 KBUILD_MODNAME);
+	res = devm_request_mem_region(&pdev->dev, priv->mapbase,
+				      CHAM_HEADER_SIZE,
+				      KBUILD_MODNAME);
 	if (!res) {
 		dev_err(&pdev->dev, "Failed to request PCI memory\n");
 		ret = -EBUSY;
 		goto out_disable;
 	}
 
-	priv->base = ioremap(priv->mapbase, CHAM_HEADER_SIZE);
+	priv->base = devm_ioremap(&pdev->dev, priv->mapbase, CHAM_HEADER_SIZE);
 	if (!priv->base) {
 		dev_err(&pdev->dev, "Cannot ioremap\n");
 		ret = -ENOMEM;
-		goto out_release;
+		goto out_disable;
 	}
 
 	flags = pci_resource_flags(pdev, 0);

@@ -75,7 +76,7 @@ static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		ret = -ENOTSUPP;
 		dev_err(&pdev->dev,
 			"IO mapped PCI devices are not supported\n");
-		goto out_iounmap;
+		goto out_disable;
 	}
 
 	pci_set_drvdata(pdev, priv);

@@ -83,7 +84,7 @@ static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	priv->bus = mcb_alloc_bus(&pdev->dev);
 	if (IS_ERR(priv->bus)) {
 		ret = PTR_ERR(priv->bus);
-		goto out_iounmap;
+		goto out_disable;
 	}
 
 	priv->bus->get_irq = mcb_pci_get_irq;

@@ -101,10 +102,6 @@ static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
 out_mcb_bus:
 	mcb_release_bus(priv->bus);
-out_iounmap:
-	iounmap(priv->base);
-out_release:
-	pci_release_region(pdev, 0);
 out_disable:
 	pci_disable_device(pdev);
 	return ret;

@@ -116,8 +113,6 @@ static void mcb_pci_remove(struct pci_dev *pdev)
 
 	mcb_release_bus(priv->bus);
 
-	iounmap(priv->base);
-	release_region(priv->mapbase, CHAM_HEADER_SIZE);
 	pci_disable_device(pdev);
 }
 

Signature · 1 line

2.6.2

The num_cells variable is only used in the dev_dbg print, but we can directly use the ret variable which also includes the same value.

Signed-off-by Andreas Werner <[email protected]>

---
 drivers/mcb/mcb-pci.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

drivers/mcb/mcb-pci.c +1 -3

index 99dd9db..b15a034 100644
@@ -35,7 +35,6 @@ static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	struct resource *res;
 	struct priv *priv;
 	int ret;
-	int num_cells;
 	unsigned long flags;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(struct priv), GFP_KERNEL);

@@ -92,9 +91,8 @@ static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	ret = chameleon_parse_cells(priv->bus, priv->mapbase, priv->base);
 	if (ret < 0)
 		goto out_mcb_bus;
-	num_cells = ret;
 
-	dev_dbg(&pdev->dev, "Found %d cells\n", num_cells);
+	dev_dbg(&pdev->dev, "Found %d cells\n", ret);
 
 	mcb_bus_add_devices(priv->bus);
 

Signature · 1 line

2.6.2