net/rds: use one sided reconnection during a race

net/rds: use one sided reconnection during a race

This commit reverts commit 812c02791add ("RDS: restore the exponential
back-off scheme") to use one sided reconnection when a race is
detected. When a race is detected, the active side reconnects as fast
as possible, whereas the passive side wait for 15s.

Orabug: 28068627

Signed-off-by: Wei Lin Guay <wei.lin.guay@oracle.com>
Tested-by: Dib Chatterjee <dib.chatterjee@oracle.com>
(cherry picked from commit 464c84386ab55a2700d963619a470a55e53a1b66
repo https://linux-git.us.oracle.com/UEK/linux-wguay-public)

Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
	net/rds/ib_cm.c
	net/rds/rdma_transport.c
	net/rds/threads.c

	Made it checkpatch clean.

Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Signed-off-by: Brian Maly <brian.maly@oracle.com>