From 956a27ecfad51048c7614ec256c638f166bd8db3 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 20 Sep 2017 20:11:00 -0400
Subject: [PATCH] mISDN: switch to sock_recvmsg()
here we do need to reinitialize ->msg_iter on each call - the
data in buffer is overwritten every time, not appended to.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
drivers/isdn/mISDN/l1oip_core.c | 22 +++++++++-------------
1 file changed, 9 insertions(+), 13 deletions(-)
diff --git a/drivers/isdn/mISDN/l1oip_core.c b/drivers/isdn/mISDN/l1oip_core.c
index e3654782a3e2f..21d50e4cc5e1d 100644
--- a/drivers/isdn/mISDN/l1oip_core.c
+++ b/drivers/isdn/mISDN/l1oip_core.c
@@ -645,8 +645,10 @@ l1oip_socket_thread(void *data)
{
struct l1oip *hc = (struct l1oip *)data;
int ret = 0;
- struct msghdr msg;
struct sockaddr_in sin_rx;
+ struct kvec iov;
+ struct msghdr msg = {.msg_name = &sin_rx,
+ .msg_namelen = sizeof(sin_rx)};
unsigned char *recvbuf;
size_t recvbuf_size = 1500;
int recvlen;
@@ -661,6 +663,9 @@ l1oip_socket_thread(void *data)
goto fail;
}
+ iov.iov_base = recvbuf;
+ iov.iov_len = recvbuf_size;
+
/* make daemon */
allow_signal(SIGTERM);
@@ -697,12 +702,6 @@ l1oip_socket_thread(void *data)
goto fail;
}
- /* build receive message */
- msg.msg_name = &sin_rx;
- msg.msg_namelen = sizeof(sin_rx);
- msg.msg_control = NULL;
- msg.msg_controllen = 0;
-
/* build send message */
hc->sendmsg.msg_name = &hc->sin_remote;
hc->sendmsg.msg_namelen = sizeof(hc->sin_remote);
@@ -719,12 +718,9 @@ l1oip_socket_thread(void *data)
printk(KERN_DEBUG "%s: socket created and open\n",
__func__);
while (!signal_pending(current)) {
- struct kvec iov = {
- .iov_base = recvbuf,
- .iov_len = recvbuf_size,
- };
- recvlen = kernel_recvmsg(socket, &msg, &iov, 1,
- recvbuf_size, 0);
+ iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1,
+ recvbuf_size);
+ recvlen = sock_recvmsg(socket, &msg, 0);
if (recvlen > 0) {
l1oip_socket_parse(hc, &sin_rx, recvbuf, recvlen);
} else {
--
2.39.5