Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[cascardo/linux.git] / drivers / net / tun.c

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 66109a2..f042b03 100644 (file)
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1471,14 +1471,17 @@ static int tun_recvmsg(struct kiocb *iocb, struct socket *sock,
        if (!tun)
                return -EBADFD;
 
-       if (flags & ~(MSG_DONTWAIT|MSG_TRUNC))
-               return -EINVAL;
+       if (flags & ~(MSG_DONTWAIT|MSG_TRUNC)) {
+               ret = -EINVAL;
+               goto out;
+       }
        ret = tun_do_read(tun, tfile, iocb, m->msg_iov, total_len,
                          flags & MSG_DONTWAIT);
        if (ret > total_len) {
                m->msg_flags |= MSG_TRUNC;
                ret = flags & MSG_TRUNC ? ret : total_len;
        }
+out:
        tun_put(tun);
        return ret;
 }
@@ -1593,8 +1596,12 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
                        return err;
 
                if (tun->flags & TUN_TAP_MQ &&
-                   (tun->numqueues + tun->numdisabled > 1))
-                       return -EBUSY;
+                   (tun->numqueues + tun->numdisabled > 1)) {
+                       /* One or more queue has already been attached, no need
+                        * to initialize the device again.
+                        */
+                       return 0;
+               }
        }
        else {
                char *name;