[PATCH 7/9] ethernet: stmicro: Simplify PCI devres usage

[Philipp Stanner <pstanner@redhat.com>]

stmicro uses PCI devres in the wrong way. Resources requested
through pcim_* functions don't need to be cleaned up manually in the
remove() callback or in the error unwind path of a probe() function.

Moreover, there is an unnecessary loop which only requests and ioremaps
BAR 0, but iterates over all BARs nevertheless.

Furthermore, pcim_iomap_regions() and pcim_iomap_table() have been
deprecated by the PCI subsystem in commit e354bb84a4c1 ("PCI: Deprecate
pcim_iomap_table(), pcim_iomap_regions_request_all()").

Replace these functions with pcim_iomap_region().

Remove the unnecessary manual pcim_* cleanup calls.

Remove the unnecessary loop over all BARs.

Signed-off-by: Philipp Stanner <pstanner@redhat.com>
---
 .../ethernet/stmicro/stmmac/dwmac-loongson.c  | 25 +++++--------------
 .../net/ethernet/stmicro/stmmac/stmmac_pci.c  | 18 +++++--------
 2 files changed, 12 insertions(+), 31 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
index 9e40c28d453a..5d42a9fad672 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
@@ -50,7 +50,7 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
 	struct plat_stmmacenet_data *plat;
 	struct stmmac_resources res;
 	struct device_node *np;
-	int ret, i, phy_mode;
+	int ret, phy_mode;
 
 	np = dev_of_node(&pdev->dev);
 
@@ -88,14 +88,11 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
 		goto err_put_node;
 	}
 
-	/* Get the base address of device */
-	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
-		if (pci_resource_len(pdev, i) == 0)
-			continue;
-		ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
-		if (ret)
-			goto err_disable_device;
-		break;
+	memset(&res, 0, sizeof(res));
+	res.addr = pcim_iomap_region(pdev, 0, pci_name(pdev));
+	if (IS_ERR(res.addr)) {
+		ret = PTR_ERR(res.addr);
+		goto err_disable_device;
 	}
 
 	plat->bus_id = of_alias_get_id(np, "ethernet");
@@ -116,8 +113,6 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
 
 	loongson_default_data(plat);
 	pci_enable_msi(pdev);
-	memset(&res, 0, sizeof(res));
-	res.addr = pcim_iomap_table(pdev)[0];
 
 	res.irq = of_irq_get_byname(np, "macirq");
 	if (res.irq < 0) {
@@ -158,18 +153,10 @@ static void loongson_dwmac_remove(struct pci_dev *pdev)
 {
 	struct net_device *ndev = dev_get_drvdata(&pdev->dev);
 	struct stmmac_priv *priv = netdev_priv(ndev);
-	int i;
 
 	of_node_put(priv->plat->mdio_node);
 	stmmac_dvr_remove(&pdev->dev);
 
-	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
-		if (pci_resource_len(pdev, i) == 0)
-			continue;
-		pcim_iounmap_regions(pdev, BIT(i));
-		break;
-	}
-
 	pci_disable_msi(pdev);
 	pci_disable_device(pdev);
 }
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
index 352b01678c22..f89a8a54c4e8 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
@@ -188,11 +188,11 @@ static int stmmac_pci_probe(struct pci_dev *pdev,
 		return ret;
 	}
 
-	/* Get the base address of device */
+	/* Request the base address BAR of device */
 	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
 		if (pci_resource_len(pdev, i) == 0)
 			continue;
-		ret = pcim_iomap_regions(pdev, BIT(i), pci_name(pdev));
+		ret = pcim_request_region(pdev, i, pci_name(pdev));
 		if (ret)
 			return ret;
 		break;
@@ -205,7 +205,10 @@ static int stmmac_pci_probe(struct pci_dev *pdev,
 		return ret;
 
 	memset(&res, 0, sizeof(res));
-	res.addr = pcim_iomap_table(pdev)[i];
+	/* Get the base address of device */
+	res.addr = pcim_iomap(pdev, i, 0);
+	if (!res.addr)
+		return -ENOMEM;
 	res.wol_irq = pdev->irq;
 	res.irq = pdev->irq;
 
@@ -231,16 +234,7 @@ static int stmmac_pci_probe(struct pci_dev *pdev,
  */
 static void stmmac_pci_remove(struct pci_dev *pdev)
 {
-	int i;
-
 	stmmac_dvr_remove(&pdev->dev);
-
-	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
-		if (pci_resource_len(pdev, i) == 0)
-			continue;
-		pcim_iounmap_regions(pdev, BIT(i));
-		break;
-	}
 }
 
 static int __maybe_unused stmmac_pci_suspend(struct device *dev)
-- 
2.46.0