cmtp: fix compat_ioctl

Use compat_ptr(). And don't mess with fs/compat_ioctl.c

Signed-off-by: Al Viro <[e-mail]>

fs/compat_ioctl.c

···
 #define HCIUARTSETFLAGS		_IOW('U', 203, int)
 #define HCIUARTGETFLAGS		_IOR('U', 204, int)
 
-#define CMTPCONNADD	_IOW('C', 200, int)
-#define CMTPCONNDEL	_IOW('C', 201, int)
-#define CMTPGETCONNLIST	_IOR('C', 210, int)
-#define CMTPGETCONNINFO	_IOR('C', 211, int)
-
 #define HIDPCONNADD	_IOW('H', 200, int)
 #define HIDPCONNDEL	_IOW('H', 201, int)
 #define HIDPGETCONNLIST	_IOR('H', 210, int)
···
 COMPATIBLE_IOCTL(RFCOMMGETDEVLIST)
 COMPATIBLE_IOCTL(RFCOMMGETDEVINFO)
 COMPATIBLE_IOCTL(RFCOMMSTEALDLC)
-COMPATIBLE_IOCTL(CMTPCONNADD)
-COMPATIBLE_IOCTL(CMTPCONNDEL)
-COMPATIBLE_IOCTL(CMTPGETCONNLIST)
-COMPATIBLE_IOCTL(CMTPGETCONNINFO)
 COMPATIBLE_IOCTL(HIDPCONNADD)
 COMPATIBLE_IOCTL(HIDPCONNDEL)
 COMPATIBLE_IOCTL(HIDPGETCONNLIST)

net/bluetooth/cmtp/sock.c

···
 	return 0;
 }
 
-static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+static int do_cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
 {
 	struct cmtp_connadd_req ca;
 	struct cmtp_conndel_req cd;
 	struct cmtp_connlist_req cl;
 	struct cmtp_conninfo ci;
 	struct socket *nsock;
-	void __user *argp = (void __user *)arg;
 	int err;
 
-	BT_DBG("cmd %x arg %lx", cmd, arg);
+	BT_DBG("cmd %x arg %p", cmd, argp);
 
 	switch (cmd) {
 	case CMTPCONNADD:
···
 	return -EINVAL;
 }
 
+static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	return do_cmtp_sock_ioctl(sock, cmd, (void __user *)arg);
+}
+
 #ifdef CONFIG_COMPAT
 static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 {
+	void __user *argp = compat_ptr(arg);
 	if (cmd == CMTPGETCONNLIST) {
 		struct cmtp_connlist_req cl;
+		u32 __user *p = argp;
 		u32 uci;
 		int err;
 
-		if (get_user(cl.cnum, (u32 __user *) arg) ||
-				get_user(uci, (u32 __user *) (arg + 4)))
+		if (get_user(cl.cnum, p) || get_user(uci, p + 1))
 			return -EFAULT;
 
 		cl.ci = compat_ptr(uci);
···
 
 		err = cmtp_get_connlist(&cl);
 
-		if (!err && put_user(cl.cnum, (u32 __user *) arg))
+		if (!err && put_user(cl.cnum, p))
 			err = -EFAULT;
 
 		return err;
 	}
 
-	return cmtp_sock_ioctl(sock, cmd, arg);
+	return do_cmtp_sock_ioctl(sock, cmd, argp);
 }
 #endif