1 files changed, 17 insertions, 10 deletions

diff --git a/drivers/block/paride/pt.c b/drivers/block/paride/pt.c
index 8b9549ab4a4e..5c74c3574a5a 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>
 
@@ -189,8 +190,7 @@ module_param_array(drive3, int, NULL, 0);
 #define ATAPI_LOG_SENSE         0x4d
 
 static int pt_open(struct inode *inode, struct file *file);
-static int pt_ioctl(struct inode *inode, struct file *file,
-                    unsigned int cmd, unsigned long arg);
+static long pt_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 static int pt_release(struct inode *inode, struct file *file);
 static ssize_t pt_read(struct file *filp, char __user *buf,
                        size_t count, loff_t * ppos);
@@ -236,7 +236,7 @@ static const struct file_operations pt_fops = {
         .owner = THIS_MODULE,
         .read = pt_read,
         .write = pt_write,
-        .ioctl = pt_ioctl,
+        .unlocked_ioctl = pt_ioctl,
         .open = pt_open,
         .release = pt_release,
 };
@@ -650,8 +650,11 @@ 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))
@@ -678,15 +681,16 @@ 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;
 }
 
-static int pt_ioctl(struct inode *inode, struct file *file,
-         unsigned int cmd, unsigned long arg)
+static long pt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
         struct pt_unit *tape = file->private_data;
         struct mtop __user *p = (void __user *)arg;
@@ -700,23 +704,26 @@ static int pt_ioctl(struct inode *inode, struct file *file,
                 switch (mtop.mt_op) {
 
                 case MTREW:
+                        lock_kernel();
                         pt_rewind(tape);
+                        unlock_kernel();
                         return 0;
 
                 case MTWEOF:
+                        lock_kernel();
                         pt_write_fm(tape);
+                        unlock_kernel();
                         return 0;
 
                 default:
-                        printk("%s: Unimplemented mt_op %d\n", tape->name,
+                        /* FIXME: rate limit ?? */
+                        printk(KERN_DEBUG "%s: Unimplemented mt_op %d\n", tape->name,
                                mtop.mt_op);
                         return -EINVAL;
                 }
 
         default:
-                printk("%s: Unimplemented ioctl 0x%x\n", tape->name, cmd);
-                return -EINVAL;
-
+                return -ENOTTY;
         }
 }