diff options
| author | Jonathan Corbet <corbet@lwn.net> | 2008-05-15 09:38:18 -0600 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2008-06-20 14:03:43 -0600 |
| commit | 51a776fa7a7997e726d4a478eda0854c6f9143bd (patch) | |
| tree | 4e56020d78b78c36d6bd153cc716dabd65af1eea | |
| parent | 0bec0bba7a507bdaf07312fcabdc00b5576abb32 (diff) | |
rtc: cdev lock_kernel() pushdown
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| -rw-r--r-- | drivers/rtc/rtc-dev.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c index 90dfa0df747..0114a78b7cb 100644 --- a/drivers/rtc/rtc-dev.c +++ b/drivers/rtc/rtc-dev.c @@ -13,6 +13,7 @@ #include <linux/module.h> #include <linux/rtc.h> +#include <linux/smp_lock.h> #include "rtc-core.h" static dev_t rtc_devt; @@ -26,8 +27,11 @@ static int rtc_dev_open(struct inode *inode, struct file *file) struct rtc_device, char_dev); const struct rtc_class_ops *ops = rtc->ops; - if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags)) - return -EBUSY; + lock_kernel(); + if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags)) { + err = -EBUSY; + goto out; + } file->private_data = rtc; @@ -37,11 +41,13 @@ static int rtc_dev_open(struct inode *inode, struct file *file) rtc->irq_data = 0; spin_unlock_irq(&rtc->irq_lock); - return 0; + goto out; } /* something has gone wrong */ clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags); +out: + unlock_kernel(); return err; } |