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authorChangcheng Deng <deng.changcheng@zte.com.cn>2021-11-25 01:49:24 +0000
committerWim Van Sebroeck <wim@linux-watchdog.org>2021-12-28 14:03:03 +0100
commit1fc8a2c021c3abb8083ef4d9b6d4c93f88f33dc7 (patch)
tree973234484b8a9fe68059b3f8c28a36e39e477774 /drivers/watchdog/davinci_wdt.c
parentf8d9ba7fedd2a5c21759ce3f39a37663c895d3dd (diff)
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 <zealci@zte.com.cn> Signed-off-by: Changcheng Deng <deng.changcheng@zte.com.cn> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20211125014924.46297-1-deng.changcheng@zte.com.cn Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog/davinci_wdt.c')
-rw-r--r--drivers/watchdog/davinci_wdt.c2
1 files changed, 1 insertions, 1 deletions
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;
}