diff options
Diffstat (limited to 'drivers/rtc/rtc-sh.c')
| -rw-r--r-- | drivers/rtc/rtc-sh.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c index 5ed66acf8ca5..1c3fc6b428e9 100644 --- a/drivers/rtc/rtc-sh.c +++ b/drivers/rtc/rtc-sh.c @@ -24,6 +24,7 @@ #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/io.h> +#include <linux/log2.h> #include <asm/rtc.h> #define DRV_NAME "sh-rtc" @@ -551,6 +552,8 @@ static int sh_rtc_irq_set_state(struct device *dev, int enabled) static int sh_rtc_irq_set_freq(struct device *dev, int freq) { + if (!is_power_of_2(freq)) + return -EINVAL; return sh_rtc_ioctl(dev, RTC_IRQP_SET, freq); } |