diff options
Diffstat (limited to 'drivers/char/vc_screen.c')
| -rw-r--r-- | drivers/char/vc_screen.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/char/vc_screen.c b/drivers/char/vc_screen.c index 83aeedda200c..eebfad2777d2 100644 --- a/drivers/char/vc_screen.c +++ b/drivers/char/vc_screen.c @@ -34,6 +34,7 @@ #include <linux/kbd_kern.h> #include <linux/console.h> #include <linux/device.h> +#include <linux/smp_lock.h> #include <asm/uaccess.h> #include <asm/byteorder.h> @@ -460,9 +461,13 @@ static int vcs_open(struct inode *inode, struct file *filp) { unsigned int currcons = iminor(inode) & 127; + int ret = 0; + + lock_kernel(); if(currcons && !vc_cons_allocated(currcons-1)) - return -ENXIO; - return 0; + ret = -ENXIO; + unlock_kernel(); + return ret; } static const struct file_operations vcs_fops = { |