linux-kernel - [PATCH 4.4 16/75] net: davicom: Fix regulator not turned off on failed probe

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Message-Id: <20210315135208.789142975@linuxfoundation.org>
Date:   Mon, 15 Mar 2021 14:51:30 +0100
From:   gregkh@...uxfoundation.org
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.4 16/75] net: davicom: Fix regulator not turned off on failed probe

From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

From: Paul Cercueil <paul@...pouillou.net>

commit ac88c531a5b38877eba2365a3f28f0c8b513dc33 upstream.

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@...pouillou.net>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/davicom/dm9000.c |   12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/davicom/dm9000.c
+++ b/drivers/net/ethernet/davicom/dm9000.c
@@ -1462,7 +1462,7 @@ dm9000_probe(struct platform_device *pde
 		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 */
@@ -1474,8 +1474,10 @@ dm9000_probe(struct platform_device *pde
 
 	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 */
@@ -1710,6 +1712,10 @@ out:
 	dm9000_release_board(pdev, db);
 	free_netdev(ndev);
 
+out_regulator_disable:
+	if (!IS_ERR(power))
+		regulator_disable(power);
+
 	return ret;
 }