3 files changed, 12 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-core/dvbdev.c b/drivers/media/dvb/dvb-core/dvbdev.c
index 8b56d929f7fd..e208a60c048a 100644
--- a/drivers/media/dvb/dvb-core/dvbdev.c
+++ b/drivers/media/dvb/dvb-core/dvbdev.c
@@ -32,6 +32,7 @@
 #include <linux/fs.h>
 #include <linux/cdev.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include "dvbdev.h"
 
 static int dvbdev_debug;
@@ -74,6 +75,7 @@ static int dvb_device_open(struct inode *inode, struct file *file)
 {
         struct dvb_device *dvbdev;
 
+        lock_kernel();
         dvbdev = dvbdev_find_device (iminor(inode));
 
         if (dvbdev && dvbdev->fops) {
@@ -90,8 +92,10 @@ static int dvb_device_open(struct inode *inode, struct file *file)
                         file->f_op = fops_get(old_fops);
                 }
                 fops_put(old_fops);
+                unlock_kernel();
                 return err;
         }
+        unlock_kernel();
         return -ENODEV;
 }
 
diff --git a/drivers/media/radio/miropcm20-rds.c b/drivers/media/radio/miropcm20-rds.c
index 06dfed9ef4c7..3e840f74d45c 100644
--- a/drivers/media/radio/miropcm20-rds.c
+++ b/drivers/media/radio/miropcm20-rds.c
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/fs.h>
 #include <linux/miscdevice.h>
 #include <linux/delay.h>
@@ -27,13 +28,16 @@ static int rds_f_open(struct inode *in, struct file *fi)
         if (rds_users)
                 return -EBUSY;
 
+        lock_kernel();
         rds_users++;
         if ((text_buffer=kmalloc(66, GFP_KERNEL)) == 0) {
                 rds_users--;
                 printk(KERN_NOTICE "aci-rds: Out of memory by open()...\n");
+                unlock_kernel();
                 return -ENOMEM;
         }
 
+        unlock_kernel();
         return 0;
 }
 
diff --git a/drivers/media/video/videodev.c b/drivers/media/video/videodev.c
index 67a661cf5219..7649860a388d 100644
--- a/drivers/media/video/videodev.c
+++ b/drivers/media/video/videodev.c
@@ -36,6 +36,7 @@
 #include <linux/init.h>
 #include <linux/kmod.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
 
@@ -442,6 +443,7 @@ static int video_open(struct inode *inode, struct file *file)
 
         if(minor>=VIDEO_NUM_DEVICES)
                 return -ENODEV;
+        lock_kernel();
         mutex_lock(&videodev_lock);
         vfl=video_device[minor];
         if(vfl==NULL) {
@@ -451,6 +453,7 @@ static int video_open(struct inode *inode, struct file *file)
                 vfl=video_device[minor];
                 if (vfl==NULL) {
                         mutex_unlock(&videodev_lock);
+                        unlock_kernel();
                         return -ENODEV;
                 }
         }
@@ -464,6 +467,7 @@ static int video_open(struct inode *inode, struct file *file)
         }
         fops_put(old_fops);
         mutex_unlock(&videodev_lock);
+        unlock_kernel();
         return err;
 }