diff options
Diffstat (limited to 'drivers/telephony/phonedev.c')
| -rw-r--r-- | drivers/telephony/phonedev.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/telephony/phonedev.c b/drivers/telephony/phonedev.c index bcea8d9b718c..4d74ba36c3a1 100644 --- a/drivers/telephony/phonedev.c +++ b/drivers/telephony/phonedev.c @@ -23,6 +23,7 @@ #include <linux/errno.h> #include <linux/phonedev.h> #include <linux/init.h> +#include <linux/smp_lock.h> #include <asm/uaccess.h> #include <asm/system.h> @@ -53,6 +54,7 @@ static int phone_open(struct inode *inode, struct file *file) if (minor >= PHONE_NUM_DEVICES) return -ENODEV; + lock_kernel(); mutex_lock(&phone_lock); p = phone_device[minor]; if (p) @@ -79,6 +81,7 @@ static int phone_open(struct inode *inode, struct file *file) fops_put(old_fops); end: mutex_unlock(&phone_lock); + unlock_kernel(); return err; } |