linux-kernel - [PATCH 5.4 014/453] xsk: Fix xsk

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Date:   Mon, 28 Dec 2020 13:44:10 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Björn Töpel <bjorn.topel@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 014/453] xsk: Fix xsk_poll()s return type

From: Luc Van Oostenryck <luc.vanoostenryck@...il.com>

[ Upstream commit 5d946c5abbaf68083fa6a41824dd79e1f06286d8 ]

xsk_poll() is defined as returning 'unsigned int' but the
.poll method is declared as returning '__poll_t', a bitwise type.

Fix this by using the proper return type and using the EPOLL
constants instead of the POLL ones, as required for __poll_t.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
Acked-by: Björn Töpel <bjorn.topel@...el.com>
Link: https://lore.kernel.org/bpf/20191120001042.30830-1-luc.vanoostenryck@gmail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/xdp/xsk.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index f9eb5efb237c7..04652797cd374 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -426,10 +426,10 @@ static int xsk_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len)
 	return __xsk_sendmsg(sk);
 }
 
-static unsigned int xsk_poll(struct file *file, struct socket *sock,
+static __poll_t xsk_poll(struct file *file, struct socket *sock,
 			     struct poll_table_struct *wait)
 {
-	unsigned int mask = datagram_poll(file, sock, wait);
+	__poll_t mask = datagram_poll(file, sock, wait);
 	struct sock *sk = sock->sk;
 	struct xdp_sock *xs = xdp_sk(sk);
 	struct xdp_umem *umem;
@@ -448,9 +448,9 @@ static unsigned int xsk_poll(struct file *file, struct socket *sock,
 	}
 
 	if (xs->rx && !xskq_empty_desc(xs->rx))
-		mask |= POLLIN | POLLRDNORM;
+		mask |= EPOLLIN | EPOLLRDNORM;
 	if (xs->tx && !xskq_full_desc(xs->tx))
-		mask |= POLLOUT | POLLWRNORM;
+		mask |= EPOLLOUT | EPOLLWRNORM;
 
 	return mask;
 }
-- 
2.27.0