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watchdog: bcm7038: Check the return value from clk_prepare_enable() 

clk_prepare_enable() may fail, so we should better check its return value
and propagate it in the case of error.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
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:
Fabio Estevam 2017-07-22 17:22:59 -03:00 committed by Wim Van Sebroeck
parent 15210ad18f
commit dd0a18ca4c
1 changed files with 3 additions and 1 deletions
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4
drivers/watchdog/bcm7038_wdt.c
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@ -136,7 +136,9 @@ static int bcm7038_wdt_probe(struct platform_device *pdev)
wdt->clk = devm_clk_get(dev, NULL); wdt->clk = devm_clk_get(dev, NULL);
/* If unable to get clock, use default frequency */ /* If unable to get clock, use default frequency */
if (!IS_ERR(wdt->clk)) { if (!IS_ERR(wdt->clk)) {
clk_prepare_enable(wdt->clk); err = clk_prepare_enable(wdt->clk);
if (err)
return err;
wdt->rate = clk_get_rate(wdt->clk); wdt->rate = clk_get_rate(wdt->clk);
/* Prevent divide-by-zero exception */ /* Prevent divide-by-zero exception */
if (!wdt->rate) if (!wdt->rate)