diff options
Diffstat (limited to 'drivers/char/mbcs.c')
| -rw-r--r-- | drivers/char/mbcs.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/char/mbcs.c b/drivers/char/mbcs.c index f4716ad7348a..acd8e9ed474a 100644 --- a/drivers/char/mbcs.c +++ b/drivers/char/mbcs.c @@ -24,6 +24,7 @@ #include <linux/mm.h> #include <linux/uio.h> #include <linux/mutex.h> +#include <linux/smp_lock.h> #include <asm/io.h> #include <asm/uaccess.h> #include <asm/system.h> @@ -382,15 +383,19 @@ static int mbcs_open(struct inode *ip, struct file *fp) struct mbcs_soft *soft; int minor; + lock_kernel(); minor = iminor(ip); + /* Nothing protects access to this list... */ list_for_each_entry(soft, &soft_list, list) { if (soft->nasid == minor) { fp->private_data = soft->cxdev; + unlock_kernel(); return 0; } } + unlock_kernel(); return -ENODEV; } |