smc: convert to ->poll_mask

smc->clcsock is an internal TCP socket, after TCP socket
converts to ->poll_mask, ->poll doesn't exist any more.
So just convert smc socket to ->poll_mask too.

Fixes: 2c7d3dacebd4 ("net/tcp: convert to ->poll_mask")
Reported-by: syzbot+f5066e369b2d5fff630f@syzkaller.appspotmail.com
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 973b4471b532b0e64525e94bb2cb181a88b17bbc..da7f02edcd374c44437e34a2705f410317ea536d 100644 (file)
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -1273,8 +1273,7 @@ static __poll_t smc_accept_poll(struct sock *parent)
        return mask;
 }
 
-static __poll_t smc_poll(struct file *file, struct socket *sock,
-                            poll_table *wait)
+static __poll_t smc_poll_mask(struct socket *sock, __poll_t events)
 {
        struct sock *sk = sock->sk;
        __poll_t mask = 0;
@@ -1290,7 +1289,7 @@ static __poll_t smc_poll(struct file *file, struct socket *sock,
        if ((sk->sk_state == SMC_INIT) || smc->use_fallback) {
                /* delegate to CLC child sock */
                release_sock(sk);
-               mask = smc->clcsock->ops->poll(file, smc->clcsock, wait);
+               mask = smc->clcsock->ops->poll_mask(smc->clcsock, events);
                lock_sock(sk);
                sk->sk_err = smc->clcsock->sk->sk_err;
                if (sk->sk_err) {
@@ -1308,11 +1307,6 @@ static __poll_t smc_poll(struct file *file, struct socket *sock,
                        }
                }
        } else {
-               if (sk->sk_state != SMC_CLOSED) {
-                       release_sock(sk);
-                       sock_poll_wait(file, sk_sleep(sk), wait);
-                       lock_sock(sk);
-               }
                if (sk->sk_err)
                        mask |= EPOLLERR;
                if ((sk->sk_shutdown == SHUTDOWN_MASK) ||
@@ -1625,7 +1619,7 @@ static const struct proto_ops smc_sock_ops = {
        .socketpair     = sock_no_socketpair,
        .accept         = smc_accept,
        .getname        = smc_getname,
-       .poll           = smc_poll,
+       .poll_mask      = smc_poll_mask,
        .ioctl          = smc_ioctl,
        .listen         = smc_listen,
        .shutdown       = smc_shutdown,