tree 226806ebe455794fe94a4ac3bf8a4130197ed6f1
parent f2ea653fd448b814dd92b6554ede85abd9e22d9f
author Quinn Tran <quinn.tran@qlogic.com> 1411640095 -0400
committer Christoph Hellwig <hch@lst.de> 1411647907 +0200

qla2xxx: Add support for QFull throttling and Term Exchange retry

Through the qla target code, the qlt_send_term_exchange() routine
is used in various different places to cleanup an exchange. For the
case of IOCB request queue is full, the exchange is left unhandled/
dangling. Existing code does not have re-try logic to cleanup the
exchange. This patch add retry logic to cleanup the exchange before
letting new commands through.

For the case of FW running out of exchanges, driver need to reply
SAM_STAT_BUSY to the initiators. This patch add a pending queue
for the busy reply in case IOCB queue is unable to handle the cmd.

Cc: <stable@vger.kernel.org>
Signed-off-by: Quinn Tran <quinn.tran@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>