linux-kernel - [PATCH 0/2] Fix EH race and MQ support

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Date:   Fri, 19 Mar 2021 14:50:27 -0600
From:   Tyrel Datwyler <tyreld@...ux.ibm.com>
To:     james.bottomley@...senpartnership.com
Cc:     martin.petersen@...cle.com, linux-scsi@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        brking@...ux.ibm.com, Tyrel Datwyler <tyreld@...ux.ibm.com>
Subject: [PATCH 0/2] Fix EH race and MQ support

Changes to the locking pattern protecting the event lists and handling of scsi
command completion introduced a race where an ouststanding command that EH is
waiting ifor to complete is no longer identifiable by being on the sent list, but
instead as a command that is not on the free list. This is a result of moving
commands to be completed off the sent list to a private list to be completed
outside the list lock.

Second, during MQ enablement the ibmvfc_wait_for_ops helper used during EH to
ensure commands were properely completed failed to be converted to check for
commands on the sub-queues isntead of the primary CRQ.

Tyrel Datwyler (2):
  ibmvfc: fix potential race in ibmvfc_wait_for_ops
  ibmvfc: make ibmvfc_wait_for_ops MQ aware

 drivers/scsi/ibmvscsi/ibmvfc.c | 67 +++++++++++++++++++++++++++-------
 1 file changed, 54 insertions(+), 13 deletions(-)

-- 
2.27.0