From 1fc8a2c021c3abb8083ef4d9b6d4c93f88f33dc7 Mon Sep 17 00:00:00 2001 From: Changcheng Deng Date: Thu, 25 Nov 2021 01:49:24 +0000 Subject: watchdog: davinci: Use div64_ul instead of do_div do_div() does a 64-by-32 division. Here the divisor is an unsigned long which on some platforms is 64 bit wide. So use div64_ul instead of do_div to avoid a possible truncation. Reported-by: Zeal Robot Signed-off-by: Changcheng Deng Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20211125014924.46297-1-deng.changcheng@zte.com.cn Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- drivers/watchdog/davinci_wdt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/watchdog/davinci_wdt.c b/drivers/watchdog/davinci_wdt.c index e6eaba6bae5b..584a56893b81 100644 --- a/drivers/watchdog/davinci_wdt.c +++ b/drivers/watchdog/davinci_wdt.c @@ -134,7 +134,7 @@ static unsigned int davinci_wdt_get_timeleft(struct watchdog_device *wdd) timer_counter = ioread32(davinci_wdt->base + TIM12); timer_counter |= ((u64)ioread32(davinci_wdt->base + TIM34) << 32); - do_div(timer_counter, freq); + timer_counter = div64_ul(timer_counter, freq); return wdd->timeout - timer_counter; } -- cgit v1.2.3