diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-dev.c | 12 | ||||
| -rw-r--r-- | drivers/rtc/rtc-m41t80.c | 7 |
2 files changed, 15 insertions, 4 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; } diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c index a3e0880b38f..0a19c06019b 100644 --- a/drivers/rtc/rtc-m41t80.c +++ b/drivers/rtc/rtc-m41t80.c @@ -17,6 +17,7 @@ #include <linux/init.h> #include <linux/kernel.h> #include <linux/slab.h> +#include <linux/smp_lock.h> #include <linux/string.h> #include <linux/i2c.h> #include <linux/rtc.h> @@ -655,12 +656,16 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, static int wdt_open(struct inode *inode, struct file *file) { if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) { - if (test_and_set_bit(0, &wdt_is_open)) + lock_kernel(); + if (test_and_set_bit(0, &wdt_is_open)) { + unlock_kernel(); return -EBUSY; + } /* * Activate */ wdt_is_open = 1; + unlock_kernel(); return 0; } return -ENODEV; |