From ccc8208d0855a5b02a4fc49c141b6f1dbf282304 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Wed, 2 Mar 2016 23:33:36 +0100 Subject: watchdog: atlas7_wdt: test clock rate to avoid division by 0 The clk API may return 0 on clk_get_rate, so we should check the result before using it as a divisor. Signed-off-by: Wolfram Sang Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- drivers/watchdog/atlas7_wdt.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/watchdog/atlas7_wdt.c b/drivers/watchdog/atlas7_wdt.c index df6d9242a319..ed80734befae 100644 --- a/drivers/watchdog/atlas7_wdt.c +++ b/drivers/watchdog/atlas7_wdt.c @@ -154,6 +154,11 @@ static int atlas7_wdt_probe(struct platform_device *pdev) writel(0, wdt->base + ATLAS7_WDT_CNT_CTRL); wdt->tick_rate = clk_get_rate(clk); + if (!wdt->tick_rate) { + ret = -EINVAL; + goto err1; + } + wdt->clk = clk; atlas7_wdd.min_timeout = 1; atlas7_wdd.max_timeout = UINT_MAX / wdt->tick_rate; -- cgit v1.2.1