diff options
Diffstat (limited to 'drivers/char/nvram.c')
-rw-r--r-- | drivers/char/nvram.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c index 98dec38..a22662b 100644 --- a/drivers/char/nvram.c +++ b/drivers/char/nvram.c @@ -107,6 +107,7 @@ #include <linux/init.h> #include <linux/proc_fs.h> #include <linux/spinlock.h> +#include <linux/smp_lock.h> #include <asm/io.h> #include <asm/uaccess.h> @@ -333,12 +334,14 @@ nvram_ioctl(struct inode *inode, struct file *file, static int nvram_open(struct inode *inode, struct file *file) { + lock_kernel(); spin_lock(&nvram_state_lock); if ((nvram_open_cnt && (file->f_flags & O_EXCL)) || (nvram_open_mode & NVRAM_EXCL) || ((file->f_mode & 2) && (nvram_open_mode & NVRAM_WRITE))) { spin_unlock(&nvram_state_lock); + unlock_kernel(); return -EBUSY; } @@ -349,6 +352,7 @@ nvram_open(struct inode *inode, struct file *file) nvram_open_cnt++; spin_unlock(&nvram_state_lock); + unlock_kernel(); return 0; } @@ -440,7 +444,7 @@ nvram_init(void) /* First test whether the driver should init at all */ if (!CHECK_DRIVER_INIT()) - return -ENXIO; + return -ENODEV; ret = misc_register(&nvram_dev); if (ret) { |