smc: switch to sock_recvmsg()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 10 insertions, 8 deletions

diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c
index 1800e16b2a02..511548085d16 100644
--- a/net/smc/smc_clc.c
+++ b/net/smc/smc_clc.c
@@ -35,7 +35,7 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
         struct smc_clc_msg_hdr *clcm = buf;
         struct msghdr msg = {NULL, 0};
         int reason_code = 0;
-        struct kvec vec;
+        struct kvec vec = {buf, buflen};
         int len, datlen;
         int krflags;
 
@@ -43,12 +43,15 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
          * so we don't consume any subsequent CLC message or payload data
          * in the TCP byte stream
          */
-        vec.iov_base = buf;
-        vec.iov_len = buflen;
+        /*
+         * Caller must make sure that buflen is no less than
+         * sizeof(struct smc_clc_msg_hdr)
+         */
         krflags = MSG_PEEK | MSG_WAITALL;
         smc->clcsock->sk->sk_rcvtimeo = CLC_WAIT_TIME;
-        len = kernel_recvmsg(smc->clcsock, &msg, &vec, 1,
-                             sizeof(struct smc_clc_msg_hdr), krflags);
+        iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &vec, 1,
+                        sizeof(struct smc_clc_msg_hdr));
+        len = sock_recvmsg(smc->clcsock, &msg, krflags);
         if (signal_pending(current)) {
                 reason_code = -EINTR;
                 clc_sk->sk_err = EINTR;
@@ -83,12 +86,11 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
         }
 
         /* receive the complete CLC message */
-        vec.iov_base = buf;
-        vec.iov_len = buflen;
         memset(&msg, 0, sizeof(struct msghdr));
+        iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &vec, 1, buflen);
         krflags = MSG_WAITALL;
         smc->clcsock->sk->sk_rcvtimeo = CLC_WAIT_TIME;
-        len = kernel_recvmsg(smc->clcsock, &msg, &vec, 1, datlen, krflags);
+        len = sock_recvmsg(smc->clcsock, &msg, krflags);
         if (len < datlen) {
                 smc->sk.sk_err = EPROTO;
                 reason_code = -EPROTO;