linux-kernel - [PATCH 3.16 031/202] CIFS: Do not hide EINTR after sending network packets

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Date:   Sat, 27 Apr 2019 16:13:09 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Steve French" <stfrench@...rosoft.com>,
        "Jeff Layton" <jlayton@...nel.org>,
        "Pavel Shilovsky" <pshilov@...rosoft.com>
Subject: [PATCH 3.16 031/202] CIFS: Do not hide EINTR after sending
 network packets

3.16.66-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Pavel Shilovsky <pshilov@...rosoft.com>

commit ee13919c2e8d1f904e035ad4b4239029a8994131 upstream.

Currently we hide EINTR code returned from sock_sendmsg()
and return 0 instead. This makes a caller think that we
successfully completed the network operation which is not
true. Fix this by properly returning EINTR to callers.

Signed-off-by: Pavel Shilovsky <pshilov@...rosoft.com>
Reviewed-by: Jeff Layton <jlayton@...nel.org>
Signed-off-by: Steve French <stfrench@...rosoft.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 fs/cifs/transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -376,7 +376,7 @@ uncork:
 	if (rc < 0 && rc != -EINTR)
 		cifs_dbg(VFS, "Error %d sending data on socket to server\n",
 			 rc);
-	else
+	else if (rc > 0)
 		rc = 0;
 
 	return rc;