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Diffstat (limited to 'drivers/char/vc_screen.c')
-rw-r--r--drivers/char/vc_screen.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/char/vc_screen.c b/drivers/char/vc_screen.c
index 83aeedd..eebfad2 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 = {
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