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watchdog: davinci_wdt: fix error handling in davinci_wdt_probe()

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clk_disable_unprepare() was added to one error path,
but there is another one. The patch makes sure clk is
disabled at the both of them.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Alexey Khoroshilov 2018-03-24 00:36:46 +03:00 committed by Wim Van Sebroeck
parent 2e62c4988b
commit d66e53649c
1 changed files with 11 additions and 4 deletions
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15
drivers/watchdog/davinci_wdt.c
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@ -236,15 +236,22 @@ static int davinci_wdt_probe(struct platform_device *pdev)
wdt_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
davinci_wdt->base = devm_ioremap_resource(dev, wdt_mem);
if (IS_ERR(davinci_wdt->base))
return PTR_ERR(davinci_wdt->base);
if (IS_ERR(davinci_wdt->base)) {
ret = PTR_ERR(davinci_wdt->base);
goto err_clk_disable;
}
ret = watchdog_register_device(wdd);
if (ret < 0) {
clk_disable_unprepare(davinci_wdt->clk);
if (ret) {
dev_err(dev, "cannot register watchdog device\n");
goto err_clk_disable;
}
return 0;
err_clk_disable:
clk_disable_unprepare(davinci_wdt->clk);
return ret;
}