linux-kernel - [PATCH 2/3] uio: uio_mf624: use devm_kzalloc() for uio

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Message-ID: <20201120084207.50736-2-alexandru.ardelean@analog.com>
Date:   Fri, 20 Nov 2020 10:42:06 +0200
From:   Alexandru Ardelean <alexandru.ardelean@...log.com>
To:     <linux-kernel@...r.kernel.org>
CC:     <gregkh@...uxfoundation.org>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [PATCH 2/3] uio: uio_mf624: use devm_kzalloc() for uio_info object

This change uses the devm_kzalloc() function to tie the life-time of the
uio_info object to PCI device. This cleans up the exit & error path a bit.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
 drivers/uio/uio_mf624.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/uio/uio_mf624.c b/drivers/uio/uio_mf624.c
index b6a406986667..5065c6a073a8 100644
--- a/drivers/uio/uio_mf624.c
+++ b/drivers/uio/uio_mf624.c
@@ -136,12 +136,12 @@ static int mf624_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	struct uio_info *info;
 
-	info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
+	info = devm_kzalloc(&dev->dev, sizeof(struct uio_info), GFP_KERNEL);
 	if (!info)
 		return -ENOMEM;
 
 	if (pci_enable_device(dev))
-		goto out_free;
+		return -ENODEV;
 
 	if (pci_request_regions(dev, "mf624"))
 		goto out_disable;
@@ -189,8 +189,6 @@ static int mf624_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 out_disable:
 	pci_disable_device(dev);
 
-out_free:
-	kfree(info);
 	return -ENODEV;
 }
 
@@ -207,8 +205,6 @@ static void mf624_pci_remove(struct pci_dev *dev)
 	iounmap(info->mem[0].internal_addr);
 	iounmap(info->mem[1].internal_addr);
 	iounmap(info->mem[2].internal_addr);
-
-	kfree(info);
 }
 
 static const struct pci_device_id mf624_pci_id[] = {
-- 
2.27.0