linux-kernel - [PATCH] watchdog: sunxi_wdt: use of_device_get_match

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Date:   Sat, 21 Oct 2017 19:45:13 +0200
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     wim@...ana.be, linux@...ck-us.net,
        maxime.ripard@...e-electrons.com, wens@...e.org
Cc:     linux-watchdog@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Corentin Labbe <clabbe.montjoie@...il.com>
Subject: [PATCH] watchdog: sunxi_wdt: use of_device_get_match_data

The usage of of_device_get_match_data reduce the code size a bit.
Furthermore, it prevents an improbable dereference when
of_match_device() return NULL.

Signed-off-by: Corentin Labbe <clabbe.montjoie@...il.com>
---
 drivers/watchdog/sunxi_wdt.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/watchdog/sunxi_wdt.c b/drivers/watchdog/sunxi_wdt.c
index 9728fa32c357..802e31b1416d 100644
--- a/drivers/watchdog/sunxi_wdt.c
+++ b/drivers/watchdog/sunxi_wdt.c
@@ -234,7 +234,6 @@ MODULE_DEVICE_TABLE(of, sunxi_wdt_dt_ids);
 static int sunxi_wdt_probe(struct platform_device *pdev)
 {
 	struct sunxi_wdt_dev *sunxi_wdt;
-	const struct of_device_id *device;
 	struct resource *res;
 	int err;
 
@@ -242,12 +241,10 @@ static int sunxi_wdt_probe(struct platform_device *pdev)
 	if (!sunxi_wdt)
 		return -EINVAL;
 
-	device = of_match_device(sunxi_wdt_dt_ids, &pdev->dev);
-	if (!device)
+	sunxi_wdt->wdt_regs = of_device_get_match_data(&pdev->dev);
+	if (!sunxi_wdt->wdt_regs)
 		return -ENODEV;
 
-	sunxi_wdt->wdt_regs = device->data;
-
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	sunxi_wdt->wdt_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(sunxi_wdt->wdt_base))
-- 
2.13.6