linux-kernel - [PATCH 06/12] parport: Convert to use managed functions pcim_* and devm

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Date:   Wed,  7 Feb 2018 19:47:53 +0000
From:   Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH 06/12] parport: Convert to use managed functions pcim_* and devm_*

From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

This makes the error handling much more simpler than open-coding everything
and in addition makes the probe function smaller an tidier.

Tested-by: Nikola Ciprich <nikola.ciprich@...uxbox.cz>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@...il.com>
---
 drivers/parport/parport_serial.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/parport/parport_serial.c b/drivers/parport/parport_serial.c
index d0a5bc5..050eeb0 100644
--- a/drivers/parport/parport_serial.c
+++ b/drivers/parport/parport_serial.c
@@ -620,27 +620,23 @@ static int parport_serial_pci_probe(struct pci_dev *dev,
 	struct parport_serial_private *priv;
 	int err;
 
-	priv = kzalloc (sizeof *priv, GFP_KERNEL);
+	priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
+
 	pci_set_drvdata (dev, priv);
 
-	err = pci_enable_device (dev);
-	if (err) {
-		kfree (priv);
+	err = pcim_enable_device(dev);
+	if (err)
 		return err;
-	}
 
-	if (parport_register (dev, id)) {
-		kfree (priv);
+	if (parport_register(dev, id))
 		return -ENODEV;
-	}
 
 	if (serial_register (dev, id)) {
 		int i;
 		for (i = 0; i < priv->num_par; i++)
 			parport_pc_unregister_port (priv->port[i]);
-		kfree (priv);
 		return -ENODEV;
 	}
 
@@ -660,7 +656,6 @@ static void parport_serial_pci_remove(struct pci_dev *dev)
 	for (i = 0; i < priv->num_par; i++)
 		parport_pc_unregister_port (priv->port[i]);
 
-	kfree (priv);
 	return;
 }
 
-- 
2.7.4