ixj: push BKL into driver and wrap ioctls

Signed-off-by: NAlan Cox <alan@redhat.com>
Cc: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: Domen Puncer <domen@coderock.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/telephony/ixj.c

@@ -6095,15 +6095,15 @@ static int capabilities_check(IXJ *j, struct phone_capability *pcreq)
 	return retval;
 }
 
-static int ixj_ioctl(struct inode *inode, struct file *file_p, unsigned int cmd, unsigned long arg)
+static long do_ixj_ioctl(struct file *file_p, unsigned int cmd, unsigned long arg)
 {
 	IXJ_TONE ti;
 	IXJ_FILTER jf;
 	IXJ_FILTER_RAW jfr;
 	void __user *argp = (void __user *)arg;
-
-	unsigned int raise, mant;
+	struct inode *inode = file_p->f_path.dentry->d_inode;
 	unsigned int minor = iminor(inode);
+	unsigned int raise, mant;
 	int board = NUM(inode);
 
 	IXJ *j = get_ixj(NUM(inode));
@@ -6661,6 +6661,15 @@ static int ixj_ioctl(struct inode *inode, struct file *file_p, unsigned int cmd,
 	return retval;
 }
 
+static long ixj_ioctl(struct file *file_p, unsigned int cmd, unsigned long arg)
+{
+	long ret;
+	lock_kernel();
+	ret = do_ixj_ioctl(file_p, cmd, arg);
+	unlock_kernel();
+	return ret;
+}
+
 static int ixj_fasync(int fd, struct file *file_p, int mode)
 {
 	IXJ *j = get_ixj(NUM(file_p->f_path.dentry->d_inode));
@@ -6674,7 +6683,7 @@ static const struct file_operations ixj_fops =
         .read           = ixj_enhanced_read,
         .write          = ixj_enhanced_write,
         .poll           = ixj_poll,
-        .ioctl          = ixj_ioctl,
+        .unlocked_ioctl = ixj_ioctl,
         .release        = ixj_release,
         .fasync         = ixj_fasync
 };