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path: root/drivers/rtc/interface.c
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Diffstat (limited to 'drivers/rtc/interface.c')
-rw-r--r--drivers/rtc/interface.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index de0da545c7a1..a4f56e95cf96 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -293,7 +293,7 @@ int rtc_irq_register(struct rtc_device *rtc, struct rtc_task *task)
return -EINVAL;
/* Cannot register while the char dev is in use */
- if (!(mutex_trylock(&rtc->char_lock)))
+ if (test_and_set_bit(RTC_DEV_BUSY, &rtc->flags))
return -EBUSY;
spin_lock_irq(&rtc->irq_task_lock);
@@ -303,7 +303,7 @@ int rtc_irq_register(struct rtc_device *rtc, struct rtc_task *task)
}
spin_unlock_irq(&rtc->irq_task_lock);
- mutex_unlock(&rtc->char_lock);
+ clear_bit(RTC_DEV_BUSY, &rtc->flags);
return retval;
}