SUNRPC: Ensure we return EAGAIN in xs_nospace if congestion is cleared
authorTrond Myklebust <Trond.Myklebust@netapp.com>
Tue, 22 Nov 2011 12:44:28 +0000 (14:44 +0200)
committerTrond Myklebust <Trond.Myklebust@netapp.com>
Tue, 22 Nov 2011 21:55:27 +0000 (23:55 +0200)
commit24ca9a847791fd53d9b217330b15f3c285827a18
treea65b8af87ddc7b48911dd04c4644d2d2aaf0127d
parent866d43c9ea88daa3751b58aba16a2a9b7f7aa067
SUNRPC: Ensure we return EAGAIN in xs_nospace if congestion is cleared

By returning '0' instead of 'EAGAIN' when the tests in xs_nospace() fail
to find evidence of socket congestion, we are making the RPC engine believe
that the message was incorrectly sent and so it disconnects the socket
instead of just retrying.

The bug appears to have been introduced by commit
5e3771ce2d6a69e10fcc870cdf226d121d868491 (SUNRPC: Ensure that xs_nospace
return values are propagated).

Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org [>= 2.6.30]
Tested-by: Andrew Cooper <andrew.cooper3@citrix.com>
net/sunrpc/xprtsock.c