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Diffstat (limited to 'include/net/sock.h')
-rw-r--r--include/net/sock.h12
1 files changed, 9 insertions, 3 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index 2440f8b407eb..f665d74ae509 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2059,14 +2059,20 @@ static inline bool skwq_has_sleeper(struct socket_wq *wq)
/**
* sock_poll_wait - place memory barrier behind the poll_wait call.
* @filp: file
+ * @sock: socket to wait on
* @p: poll_table
*
* See the comments in the wq_has_sleeper function.
+ *
+ * Do not derive sock from filp->private_data here. An SMC socket establishes
+ * an internal TCP socket that is used in the fallback case. All socket
+ * operations on the SMC socket are then forwarded to the TCP socket. In case of
+ * poll, the filp->private_data pointer references the SMC socket because the
+ * TCP socket has no file assigned.
*/
-static inline void sock_poll_wait(struct file *filp, poll_table *p)
+static inline void sock_poll_wait(struct file *filp, struct socket *sock,
+ poll_table *p)
{
- struct socket *sock = filp->private_data;
-
if (!poll_does_not_wait(p)) {
poll_wait(filp, &sock->wq->wait, p);
/* We need to be sure we are in sync with the