linux-kernel - [PATCH v2 1/2] eeprom: eeprom_93xx46: use resource management

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Message-Id: <20180912080457.12238-2-brgl@bgdev.pl>
Date:   Wed, 12 Sep 2018 10:04:56 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh@...nel.org>,
        "Gustavo A . R . Silva" <gustavo@...eddedor.com>,
        Devang Panchal <devang.panchal@...tnautics.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Boris Brezillon <boris.brezillon@...tlin.com>
Cc:     linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH v2 1/2] eeprom: eeprom_93xx46: use resource management

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

Use resource managed variants of nvmem_register() and kzalloc().

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 drivers/misc/eeprom/eeprom_93xx46.c | 19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/drivers/misc/eeprom/eeprom_93xx46.c b/drivers/misc/eeprom/eeprom_93xx46.c
index 38766968bfa2..c6dd9ad9bf7b 100644
--- a/drivers/misc/eeprom/eeprom_93xx46.c
+++ b/drivers/misc/eeprom/eeprom_93xx46.c
@@ -439,7 +439,7 @@ static int eeprom_93xx46_probe(struct spi_device *spi)
 		return -ENODEV;
 	}
 
-	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
+	edev = devm_kzalloc(&spi->dev, sizeof(*edev), GFP_KERNEL);
 	if (!edev)
 		return -ENOMEM;
 
@@ -449,8 +449,7 @@ static int eeprom_93xx46_probe(struct spi_device *spi)
 		edev->addrlen = 6;
 	else {
 		dev_err(&spi->dev, "unspecified address type\n");
-		err = -EINVAL;
-		goto fail;
+		return -EINVAL;
 	}
 
 	mutex_init(&edev->lock);
@@ -473,11 +472,9 @@ static int eeprom_93xx46_probe(struct spi_device *spi)
 	edev->nvmem_config.word_size = 1;
 	edev->nvmem_config.size = edev->size;
 
-	edev->nvmem = nvmem_register(&edev->nvmem_config);
-	if (IS_ERR(edev->nvmem)) {
-		err = PTR_ERR(edev->nvmem);
-		goto fail;
-	}
+	edev->nvmem = devm_nvmem_register(&spi->dev, &edev->nvmem_config);
+	if (IS_ERR(edev->nvmem))
+		return PTR_ERR(edev->nvmem);
 
 	dev_info(&spi->dev, "%d-bit eeprom %s\n",
 		(pd->flags & EE_ADDR8) ? 8 : 16,
@@ -490,21 +487,15 @@ static int eeprom_93xx46_probe(struct spi_device *spi)
 
 	spi_set_drvdata(spi, edev);
 	return 0;
-fail:
-	kfree(edev);
-	return err;
 }
 
 static int eeprom_93xx46_remove(struct spi_device *spi)
 {
 	struct eeprom_93xx46_dev *edev = spi_get_drvdata(spi);
 
-	nvmem_unregister(edev->nvmem);
-
 	if (!(edev->pdata->flags & EE_READONLY))
 		device_remove_file(&spi->dev, &dev_attr_erase);
 
-	kfree(edev);
 	return 0;
 }
 
-- 
2.18.0