From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
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 <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
---
Should go individually via subsystem tree.
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 df6d9242a31958..ed80734befae16 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;
--
2.7.0
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