2 files changed, 23 insertions, 7 deletions

diff --git a/drivers/block/paride/pg.c b/drivers/block/paride/pg.c
index ab86e23ddc69..9d92636350e5 100644
--- a/drivers/block/paride/pg.c
+++ b/drivers/block/paride/pg.c
@@ -162,6 +162,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_DLY};
 #include <linux/pg.h>
 #include <linux/device.h>
 #include <linux/sched.h>        /* current, TASK_* */
+#include <linux/smp_lock.h>
 #include <linux/jiffies.h>
 
 #include <asm/uaccess.h>
@@ -515,12 +516,18 @@ static int pg_open(struct inode *inode, struct file *file)
 {
         int unit = iminor(inode) & 0x7f;
         struct pg *dev = &devices[unit];
+        int ret = 0;
 
-        if ((unit >= PG_UNITS) || (!dev->present))
-                return -ENODEV;
+        lock_kernel();
+        if ((unit >= PG_UNITS) || (!dev->present)) {
+                ret = -ENODEV;
+                goto out;
+        }
 
-        if (test_and_set_bit(0, &dev->access))
-                return -EBUSY;
+        if (test_and_set_bit(0, &dev->access)) {
+                ret = -EBUSY;
+                goto out;
+        }
 
         if (dev->busy) {
                 pg_reset(dev);
@@ -533,12 +540,15 @@ static int pg_open(struct inode *inode, struct file *file)
         if (dev->bufptr == NULL) {
                 clear_bit(0, &dev->access);
                 printk("%s: buffer allocation failed\n", dev->name);
-                return -ENOMEM;
+                ret = -ENOMEM;
+                goto out;
         }
 
         file->private_data = dev;
 
-        return 0;
+out:
+        unlock_kernel();
+        return ret;
 }
 
 static int pg_release(struct inode *inode, struct file *file)
diff --git a/drivers/block/paride/pt.c b/drivers/block/paride/pt.c
index 8b9549ab4a4e..314333db16ee 100644
--- a/drivers/block/paride/pt.c
+++ b/drivers/block/paride/pt.c
@@ -146,6 +146,7 @@ static int (*drives[4])[6] = {&drive0, &drive1, &drive2, &drive3};
 #include <linux/mtio.h>
 #include <linux/device.h>
 #include <linux/sched.h>        /* current, TASK_*, schedule_timeout() */
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 
@@ -650,8 +651,11 @@ static int pt_open(struct inode *inode, struct file *file)
         struct pt_unit *tape = pt + unit;
         int err;
 
-        if (unit >= PT_UNITS || (!tape->present))
+        lock_kernel();
+        if (unit >= PT_UNITS || (!tape->present)) {
+                unlock_kernel();
                 return -ENODEV;
+        }
 
         err = -EBUSY;
         if (!atomic_dec_and_test(&tape->available))
@@ -678,10 +682,12 @@ static int pt_open(struct inode *inode, struct file *file)
         }
 
         file->private_data = tape;
+        unlock_kernel();
         return 0;
 
 out:
         atomic_inc(&tape->available);
+        unlock_kernel();
         return err;
 }