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[ Upstream commit a43cced9a3 ]
rds_sendmsg() calls rds_send_mprds_hash() to find a c_path to use to
send a message. Suppose the RDS connection is not yet up. In
rds_send_mprds_hash(), it does
if (conn->c_npaths == 0)
wait_event_interruptible(conn->c_hs_waitq,
(conn->c_npaths != 0));
If it is interrupted before the connection is set up,
rds_send_mprds_hash() will return a non-zero hash value. Hence
rds_sendmsg() will use a non-zero c_path to send the message. But if
the RDS connection ends up to be non-MP capable, the message will be
lost as only the zero c_path can be used.
Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fc89a75c24