[PATCH v3 0/4] stmmac: pci: various cleanups and fixes

[PATCH v3 0/4] stmmac: pci: various cleanups and fixes

[Andy Shevchenko]

There are few cleanups and fixes regarding to stmmac PCI driver.
This has been tested on Intel Galileo board with recent net-next tree.

Since v2:
- drop patch 5/5 since it will be part of a big change across entire subsystem

Since v1:
- remove already applied patch
- append patch 1/5
- rework patch 3/5 to be functional compatible with original code

Andy Shevchenko (4):
  stmmac: pci: use defined constant instead of magic number
  stmmac: pci: convert to use dev_pm_ops
  stmmac: pci: use managed resources
  stmmac: pci: convert to use dev_* macros

 drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c | 80 ++++++++----------------
 1 file changed, 26 insertions(+), 54 deletions(-)

-- 
2.1.1

[PATCH v3 1/4] stmmac: pci: use defined constant instead of magic number

[Andy Shevchenko]

The last standard PCI resource is defined as PCI_STD_RESOURCE_END. Thus, we
could use it instead of plain integer.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
index e17a970..e45794d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
@@ -90,7 +90,7 @@ static int stmmac_pci_probe(struct pci_dev *pdev,
 	}
 
 	/* Get the base address of device */
-	for (i = 0; i <= 5; i++) {
+	for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
 		if (pci_resource_len(pdev, i) == 0)
 			continue;
 		addr = pci_iomap(pdev, i, 0);
-- 
2.1.1

[PATCH v3 2/4] stmmac: pci: convert to use dev_pm_ops

[Andy Shevchenko]

Convert system PM callbacks to use dev_pm_ops. In addition remove the PCI calls
related to a power state since the bus code cares about this already.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c | 27 ++++++++++--------------
 1 file changed, 11 insertions(+), 16 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
index e45794d..f19ac8e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
@@ -150,30 +150,26 @@ static void stmmac_pci_remove(struct pci_dev *pdev)
 	pci_disable_device(pdev);
 }
 
-#ifdef CONFIG_PM
-static int stmmac_pci_suspend(struct pci_dev *pdev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int stmmac_pci_suspend(struct device *dev)
 {
+	struct pci_dev *pdev = to_pci_dev(dev);
 	struct net_device *ndev = pci_get_drvdata(pdev);
-	int ret;
 
-	ret = stmmac_suspend(ndev);
-	pci_save_state(pdev);
-	pci_set_power_state(pdev, pci_choose_state(pdev, state));
-
-	return ret;
+	return stmmac_suspend(ndev);
 }
 
-static int stmmac_pci_resume(struct pci_dev *pdev)
+static int stmmac_pci_resume(struct device *dev)
 {
+	struct pci_dev *pdev = to_pci_dev(dev);
 	struct net_device *ndev = pci_get_drvdata(pdev);
 
-	pci_set_power_state(pdev, PCI_D0);
-	pci_restore_state(pdev);
-
 	return stmmac_resume(ndev);
 }
 #endif
 
+static SIMPLE_DEV_PM_OPS(stmmac_pm_ops, stmmac_pci_suspend, stmmac_pci_resume);
+
 #define STMMAC_VENDOR_ID 0x700
 #define STMMAC_DEVICE_ID 0x1108
 
@@ -190,10 +186,9 @@ struct pci_driver stmmac_pci_driver = {
 	.id_table = stmmac_id_table,
 	.probe = stmmac_pci_probe,
 	.remove = stmmac_pci_remove,
-#ifdef CONFIG_PM
-	.suspend = stmmac_pci_suspend,
-	.resume = stmmac_pci_resume,
-#endif
+	.driver         = {
+		.pm     = &stmmac_pm_ops,
+	},
 };
 
 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver");
-- 
2.1.1

[PATCH v3 3/4] stmmac: pci: use managed resources

[Andy Shevchenko]

Migrate pci driver to managed resources to reduce boilerplate error handling
code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c | 43 ++++++------------------
 1 file changed, 10 insertions(+), 33 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
index f19ac8e..5357a3f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
@@ -71,46 +71,37 @@ static void stmmac_default_data(void)
 static int stmmac_pci_probe(struct pci_dev *pdev,
 			    const struct pci_device_id *id)
 {
-	int ret = 0;
-	void __iomem *addr = NULL;
-	struct stmmac_priv *priv = NULL;
+	struct stmmac_priv *priv;
 	int i;
+	int ret;
 
 	/* Enable pci device */
-	ret = pci_enable_device(pdev);
+	ret = pcim_enable_device(pdev);
 	if (ret) {
 		pr_err("%s : ERROR: failed to enable %s device\n", __func__,
 		       pci_name(pdev));
 		return ret;
 	}
-	if (pci_request_regions(pdev, STMMAC_RESOURCE_NAME)) {
-		pr_err("%s: ERROR: failed to get PCI region\n", __func__);
-		ret = -ENODEV;
-		goto err_out_req_reg_failed;
-	}
 
 	/* Get the base address of device */
 	for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
 		if (pci_resource_len(pdev, i) == 0)
 			continue;
-		addr = pci_iomap(pdev, i, 0);
-		if (addr == NULL) {
-			pr_err("%s: ERROR: cannot map register memory aborting",
-			       __func__);
-			ret = -EIO;
-			goto err_out_map_failed;
-		}
+		ret = pcim_iomap_regions(pdev, BIT(i), pci_name(pdev));
+		if (ret)
+			return ret;
 		break;
 	}
+
 	pci_set_master(pdev);
 
 	stmmac_default_data();
 
-	priv = stmmac_dvr_probe(&(pdev->dev), &plat_dat, addr);
+	priv = stmmac_dvr_probe(&pdev->dev, &plat_dat,
+				pcim_iomap_table(pdev)[i]);
 	if (IS_ERR(priv)) {
 		pr_err("%s: main driver probe failed", __func__);
-		ret = PTR_ERR(priv);
-		goto err_out;
+		return PTR_ERR(priv);
 	}
 	priv->dev->irq = pdev->irq;
 	priv->wol_irq = pdev->irq;
@@ -120,15 +111,6 @@ static int stmmac_pci_probe(struct pci_dev *pdev,
 	pr_debug("STMMAC platform driver registration completed");
 
 	return 0;
-
-err_out:
-	pci_clear_master(pdev);
-err_out_map_failed:
-	pci_release_regions(pdev);
-err_out_req_reg_failed:
-	pci_disable_device(pdev);
-
-	return ret;
 }
 
 /**
@@ -141,13 +123,8 @@ err_out_req_reg_failed:
 static void stmmac_pci_remove(struct pci_dev *pdev)
 {
 	struct net_device *ndev = pci_get_drvdata(pdev);
-	struct stmmac_priv *priv = netdev_priv(ndev);
 
 	stmmac_dvr_remove(ndev);
-
-	pci_iounmap(pdev, priv->ioaddr);
-	pci_release_regions(pdev);
-	pci_disable_device(pdev);
 }
 
 #ifdef CONFIG_PM_SLEEP
-- 
2.1.1

[PATCH v3 4/4] stmmac: pci: convert to use dev_* macros

[Andy Shevchenko]

Instead of pr_* macros let's use dev_* macros which provide device name.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
index 5357a3f..5084699 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
@@ -78,8 +78,8 @@ static int stmmac_pci_probe(struct pci_dev *pdev,
 	/* Enable pci device */
 	ret = pcim_enable_device(pdev);
 	if (ret) {
-		pr_err("%s : ERROR: failed to enable %s device\n", __func__,
-		       pci_name(pdev));
+		dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n",
+			__func__);
 		return ret;
 	}
 
@@ -100,7 +100,7 @@ static int stmmac_pci_probe(struct pci_dev *pdev,
 	priv = stmmac_dvr_probe(&pdev->dev, &plat_dat,
 				pcim_iomap_table(pdev)[i]);
 	if (IS_ERR(priv)) {
-		pr_err("%s: main driver probe failed", __func__);
+		dev_err(&pdev->dev, "%s: main driver probe failed\n", __func__);
 		return PTR_ERR(priv);
 	}
 	priv->dev->irq = pdev->irq;
@@ -108,7 +108,7 @@ static int stmmac_pci_probe(struct pci_dev *pdev,
 
 	pci_set_drvdata(pdev, priv->dev);
 
-	pr_debug("STMMAC platform driver registration completed");
+	dev_dbg(&pdev->dev, "STMMAC PCI driver registration completed\n");
 
 	return 0;
 }
-- 
2.1.1

Re: [PATCH v3 0/4] stmmac: pci: various cleanups and fixes

[David Miller]

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Wed,  5 Nov 2014 12:27:25 +0200

> There are few cleanups and fixes regarding to stmmac PCI driver.
> This has been tested on Intel Galileo board with recent net-next tree.
> 
> Since v2:
> - drop patch 5/5 since it will be part of a big change across entire subsystem
> 
> Since v1:
> - remove already applied patch
> - append patch 1/5
> - rework patch 3/5 to be functional compatible with original code

These look fine, series applied to net-next, thanks.