diff options
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 66109a2ad88..f042b0373e5 100644 --- 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; |