ppdev: wrap ioctl handler in driver and push lock down

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 13 insertions, 5 deletions

diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c
index 7af7a7e6b9c2..bee39fdfba73 100644
--- a/drivers/char/ppdev.c
+++ b/drivers/char/ppdev.c
@@ -67,7 +67,7 @@
 #include <linux/major.h>
 #include <linux/ppdev.h>
 #include <linux/smp_lock.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #define PP_VERSION "ppdev: user-space parallel port driver"
 #define CHRDEV "ppdev"
@@ -328,10 +328,9 @@ static enum ieee1284_phase init_phase (int mode)
         return IEEE1284_PH_FWD_IDLE;
 }
 
-static int pp_ioctl(struct inode *inode, struct file *file,
-                    unsigned int cmd, unsigned long arg)
+static int pp_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-        unsigned int minor = iminor(inode);
+        unsigned int minor = iminor(file->f_path.dentry->d_inode);
         struct pp_struct *pp = file->private_data;
         struct parport * port;
         void __user *argp = (void __user *)arg;
@@ -634,6 +633,15 @@ static int pp_ioctl(struct inode *inode, struct file *file,
         return 0;
 }
 
+static long pp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+        long ret;
+        lock_kernel();
+        ret = pp_do_ioctl(file, cmd, arg);
+        unlock_kernel();
+        return ret;
+}
+
 static int pp_open (struct inode * inode, struct file * file)
 {
         unsigned int minor = iminor(inode);
@@ -745,7 +753,7 @@ static const struct file_operations pp_fops = {
         .read           = pp_read,
         .write          = pp_write,
         .poll           = pp_poll,
-        .ioctl          = pp_ioctl,
+        .unlocked_ioctl = pp_ioctl,
         .open           = pp_open,
         .release        = pp_release,
 };