Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit ccc8208d authored by Wolfram Sang's avatar Wolfram Sang Committed by Wim Van Sebroeck
Browse files

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: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent 882dec1f

drivers/watchdog/atlas7_wdt.c

+5 −0
Original line number Diff line number Diff line
@@ -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;