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From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
To: gregkh@linuxfoundation.org
Cc: neil@brown.name, driverdev-devel@linuxdriverproject.org
Subject: [PATCH v2 08/11] staging: mt7621-gpio: avoid devm_kzalloc() hidden inside declarations
Date: Wed, 16 May 2018 07:30:01 +0200	[thread overview]
Message-ID: <1526448604-3533-9-git-send-email-sergio.paracuellos@gmail.com> (raw)
In-Reply-To: <1526448604-3533-1-git-send-email-sergio.paracuellos@gmail.com>

Driver probe function includes a allocation using devm_kzalloc
which is "hidden" a bit inside the declarations. Extract this
to a better place to increase readability. Also because we are
allocating zeroed memory 'memset' statement is not needed at all.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
---
 drivers/staging/mt7621-gpio/gpio-mt7621.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/mt7621-gpio/gpio-mt7621.c b/drivers/staging/mt7621-gpio/gpio-mt7621.c
index c701259..2d16d62 100644
--- a/drivers/staging/mt7621-gpio/gpio-mt7621.c
+++ b/drivers/staging/mt7621-gpio/gpio-mt7621.c
@@ -156,17 +156,18 @@ mediatek_gpio_bank_probe(struct platform_device *pdev, struct device_node *bank)
 {
 	struct mtk_data *gpio_data = dev_get_drvdata(&pdev->dev);
 	const __be32 *id = of_get_property(bank, "reg", NULL);
-	struct mtk_gc *rg = devm_kzalloc(&pdev->dev,
-				sizeof(struct mtk_gc), GFP_KERNEL);
+	struct mtk_gc *rg;
 	int ret;
 
-	if (!rg || !id || be32_to_cpu(*id) > MTK_MAX_BANK)
+	if (!id || be32_to_cpu(*id) > MTK_MAX_BANK)
+		return -EINVAL;
+
+	rg = devm_kzalloc(&pdev->dev, sizeof(struct mtk_gc), GFP_KERNEL);
+	if (!rg)
 		return -ENOMEM;
 
 	gpio_data->gc_map[be32_to_cpu(*id)] = rg;
 
-	memset(rg, 0, sizeof(struct mtk_gc));
-
 	spin_lock_init(&rg->lock);
 
 	rg->chip.parent = &pdev->dev;
-- 
2.7.4

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  parent reply	other threads:[~2018-05-16  5:30 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-16  5:29 [PATCH v2 00/11] staging: mt7621-gpio: use mediatek as binding instead of custom mtk Sergio Paracuellos
2018-05-16  5:29 ` [PATCH v2 01/11] staging: mt7621-gpio: dt-bindings: add documentation for mt7621-gpio Sergio Paracuellos
2018-05-16  5:29 ` [PATCH v2 02/11] staging: mt7621-gpio: update TODO file Sergio Paracuellos
2018-05-16  5:29 ` [PATCH v2 03/11] staging: mt7621-dts: update gpios related entries to use 'mediatek' Sergio Paracuellos
2018-05-16  5:29 ` [PATCH v2 04/11] staging: mt7621-gpio: replace 'mtk' to use correct one 'mediatek' Sergio Paracuellos
2018-05-16  5:29 ` [PATCH v2 05/11] staging: mt7621-gpio: avoid use of globals and use platform_data instead Sergio Paracuellos
2018-05-16  5:29 ` [PATCH v2 06/11] staging: mt7621-dts: add interrupt device tree nodes for the gpio controller Sergio Paracuellos
2018-05-16  5:30 ` [PATCH v2 07/11] staging: mt7621-gpio: dt-bindings: add interrupt nodes to bindings doc Sergio Paracuellos
2018-05-16  5:30 ` Sergio Paracuellos [this message]
2018-05-16  8:04   ` [PATCH v2 08/11] staging: mt7621-gpio: avoid devm_kzalloc() hidden inside declarations Dan Carpenter
2018-05-16  8:56     ` Sergio Paracuellos
2018-05-16  9:40       ` Dan Carpenter
2018-05-17  4:39         ` Sergio Paracuellos
2018-05-16  5:30 ` [PATCH v2 09/11] staging: mt7621-gpio: use ternary operator in return in mediatek_gpio_get_direction Sergio Paracuellos
2018-05-16  5:30 ` [PATCH v2 10/11] staging: mt7621-gpio: use MTK_BANK_WIDTH instead of magic number Sergio Paracuellos
2018-05-16  5:30 ` [PATCH v2 11/11] staging: mt7621-gpio: update TODO list Sergio Paracuellos

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