qla2xxx: Relogin to target port on a cable swap

qla2xxx: Relogin to target port on a cable swap

Orabug: 27235104

If user swaps one target port for another target port for same
switch port, the new target port is not being recognized by the
driver. Current code assumes that old Target port has recovered
from link down. The fix will ask switch what is the WWPN of a
specific NportID (GPNID) rather than assuming it's the same Target
port which has came back.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>'
[ Upstream commit 5ef696aa9f3ccf999552d924c4e21a348f2bbea9 ]
Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com>
Reviewed-by: Jack Vogel <jack.vogel@oracle.com>