diff options
Diffstat (limited to 'drivers/sbus/char/bpp.c')
| -rw-r--r-- | drivers/sbus/char/bpp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/sbus/char/bpp.c b/drivers/sbus/char/bpp.c index 03c96605947..bba21e053a1 100644 --- a/drivers/sbus/char/bpp.c +++ b/drivers/sbus/char/bpp.c @@ -19,6 +19,7 @@ #include <linux/timer.h> #include <linux/ioport.h> #include <linux/major.h> +#include <linux/smp_lock.h> #include <asm/uaccess.h> #include <asm/io.h> @@ -429,6 +430,7 @@ static int bpp_open(struct inode *inode, struct file *f) unsigned minor = iminor(inode); int ret; + lock_kernel(); spin_lock(&bpp_open_lock); ret = 0; if (minor >= BPP_NO) { @@ -444,6 +446,7 @@ static int bpp_open(struct inode *inode, struct file *f) } } spin_unlock(&bpp_open_lock); + unlock_kernel(); return ret; } |