diff options
Diffstat (limited to 'drivers/rtc/interface.c')
-rw-r--r-- | drivers/rtc/interface.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index de0da545c7a1..7e3ad4f3b343 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -251,20 +251,23 @@ void rtc_update_irq(struct rtc_device *rtc, } EXPORT_SYMBOL_GPL(rtc_update_irq); +static int __rtc_match(struct device *dev, void *data) +{ + char *name = (char *)data; + + if (strncmp(dev->bus_id, name, BUS_ID_SIZE) == 0) + return 1; + return 0; +} + struct rtc_device *rtc_class_open(char *name) { struct device *dev; struct rtc_device *rtc = NULL; - down(&rtc_class->sem); - list_for_each_entry(dev, &rtc_class->devices, node) { - if (strncmp(dev->bus_id, name, BUS_ID_SIZE) == 0) { - dev = get_device(dev); - if (dev) - rtc = to_rtc_device(dev); - break; - } - } + dev = class_find_device(rtc_class, name, __rtc_match); + if (dev) + rtc = to_rtc_device(dev); if (rtc) { if (!try_module_get(rtc->owner)) { @@ -272,7 +275,6 @@ struct rtc_device *rtc_class_open(char *name) rtc = NULL; } } - up(&rtc_class->sem); return rtc; } @@ -293,7 +295,7 @@ 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_lock(RTC_DEV_BUSY, &rtc->flags)) return -EBUSY; spin_lock_irq(&rtc->irq_task_lock); @@ -303,7 +305,7 @@ 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_unlock(RTC_DEV_BUSY, &rtc->flags); return retval; } |