[PATCH 1/3] net: davicom: Fix regulator not turned off on failed probe

[PATCH 1/3] net: davicom: Fix regulator not turned off on failed probe

[Paul Cercueil]

When the probe fails or requests to be defered, we must disable the
regulator that was previously enabled.

Fixes: 7994fe55a4a2 ("dm9000: Add regulator and reset support to dm9000")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
 drivers/net/ethernet/davicom/dm9000.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/davicom/dm9000.c b/drivers/net/ethernet/davicom/dm9000.c
index 3fdc70dab5c1..ae744826bb9e 100644
--- a/drivers/net/ethernet/davicom/dm9000.c
+++ b/drivers/net/ethernet/davicom/dm9000.c
@@ -1449,7 +1449,7 @@ dm9000_probe(struct platform_device *pdev)
 		if (ret) {
 			dev_err(dev, "failed to request reset gpio %d: %d\n",
 				reset_gpios, ret);
-			return -ENODEV;
+			goto out_regulator_disable;
 		}
 
 		/* According to manual PWRST# Low Period Min 1ms */
@@ -1461,8 +1461,10 @@ dm9000_probe(struct platform_device *pdev)
 
 	if (!pdata) {
 		pdata = dm9000_parse_dt(&pdev->dev);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
+		if (IS_ERR(pdata)) {
+			ret = PTR_ERR(pdata);
+			goto out_regulator_disable;
+		}
 	}
 
 	/* Init network device */
@@ -1703,6 +1705,10 @@ dm9000_probe(struct platform_device *pdev)
 	dm9000_release_board(pdev, db);
 	free_netdev(ndev);
 
+out_regulator_disable:
+	if (!IS_ERR(power))
+		regulator_disable(power);
+
 	return ret;
 }
 
-- 
2.30.1

[PATCH 2/3] net: davicom: Fix regulator not turned off on driver removal

[Paul Cercueil]

We must disable the regulator that was enabled in the probe function.

Fixes: 7994fe55a4a2 ("dm9000: Add regulator and reset support to dm9000")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
 drivers/net/ethernet/davicom/dm9000.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/davicom/dm9000.c b/drivers/net/ethernet/davicom/dm9000.c
index ae744826bb9e..a95e95ce9438 100644
--- a/drivers/net/ethernet/davicom/dm9000.c
+++ b/drivers/net/ethernet/davicom/dm9000.c
@@ -133,6 +133,8 @@ struct board_info {
 	u32		wake_state;
 
 	int		ip_summed;
+
+	struct regulator *power_supply;
 };
 
 /* debug code */
@@ -1481,6 +1483,8 @@ dm9000_probe(struct platform_device *pdev)
 
 	db->dev = &pdev->dev;
 	db->ndev = ndev;
+	if (!IS_ERR(power))
+		db->power_supply = power;
 
 	spin_lock_init(&db->lock);
 	mutex_init(&db->addr_lock);
@@ -1766,10 +1770,13 @@ static int
 dm9000_drv_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct board_info *dm = to_dm9000_board(ndev);
 
 	unregister_netdev(ndev);
-	dm9000_release_board(pdev, netdev_priv(ndev));
+	dm9000_release_board(pdev, dm);
 	free_netdev(ndev);		/* free device structure */
+	if (dm->power_supply)
+		regulator_disable(dm->power_supply);
 
 	dev_dbg(&pdev->dev, "released and freed device\n");
 	return 0;
-- 
2.30.1

[PATCH 3/3] net: davicom: Use platform_get_irq_optional()

[Paul Cercueil]

The second IRQ line really is optional, so use
platform_get_irq_optional() to obtain it.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
 drivers/net/ethernet/davicom/dm9000.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/davicom/dm9000.c b/drivers/net/ethernet/davicom/dm9000.c
index a95e95ce9438..252adfa5d837 100644
--- a/drivers/net/ethernet/davicom/dm9000.c
+++ b/drivers/net/ethernet/davicom/dm9000.c
@@ -1507,7 +1507,7 @@ dm9000_probe(struct platform_device *pdev)
 		goto out;
 	}
 
-	db->irq_wake = platform_get_irq(pdev, 1);
+	db->irq_wake = platform_get_irq_optional(pdev, 1);
 	if (db->irq_wake >= 0) {
 		dev_dbg(db->dev, "wakeup irq %d\n", db->irq_wake);
 
-- 
2.30.1

Re: [PATCH 1/3] net: davicom: Fix regulator not turned off on failed probe

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net.git (refs/heads/master):

On Sun,  7 Mar 2021 13:17:47 +0000 you wrote:
> When the probe fails or requests to be defered, we must disable the
> regulator that was previously enabled.
> 
> Fixes: 7994fe55a4a2 ("dm9000: Add regulator and reset support to dm9000")
> Signed-off-by: Paul Cercueil <paul@crapouillou.net>
> ---
>  drivers/net/ethernet/davicom/dm9000.c | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)

Here is the summary with links:
  - [1/3] net: davicom: Fix regulator not turned off on failed probe
    https://git.kernel.org/netdev/net/c/ac88c531a5b3
  - [2/3] net: davicom: Fix regulator not turned off on driver removal
    https://git.kernel.org/netdev/net/c/cf9e60aa69ae
  - [3/3] net: davicom: Use platform_get_irq_optional()
    https://git.kernel.org/netdev/net/c/2e2696223676

You are awesome, thank you!
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