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Fri, 16 Oct 2020 14:17:33 -0700 (PDT) From: James Smart To: linux-nvme@lists.infradead.org Subject: [PATCH] nvme-fc: wait for queues to freeze before calling update_hr_hw_queues Date: Fri, 16 Oct 2020 14:17:24 -0700 Message-Id: <20201016211724.48707-1-james.smart@broadcom.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201016_171738_768068_A7E168AE X-CRM114-Status: GOOD ( 11.68 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: James Smart Content-Type: multipart/mixed; boundary="===============7559740394618835123==" Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org --===============7559740394618835123== Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000221db805b1d04b7e" --000000000000221db805b1d04b7e Content-Transfer-Encoding: 8bit On reconnect, the code currently does not freeze the controller before possibly updating the number hw queues for the controller. Add the freeze before updating the number of hw queues. Note: the queues are already started and remain started through the reconnect. Signed-off-by: James Smart --- drivers/nvme/host/fc.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c index c81ebe94d8fe..7067aaf50bf7 100644 --- a/drivers/nvme/host/fc.c +++ b/drivers/nvme/host/fc.c @@ -2885,11 +2885,14 @@ nvme_fc_recreate_io_queues(struct nvme_fc_ctrl *ctrl) if (ret) goto out_delete_hw_queues; - if (prior_ioq_cnt != nr_io_queues) + if (prior_ioq_cnt != nr_io_queues) { dev_info(ctrl->ctrl.device, "reconnect: revising io queue count from %d to %d\n", prior_ioq_cnt, nr_io_queues); - blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues); + nvme_wait_freeze(&ctrl->ctrl); + blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues); + nvme_unfreeze(&ctrl->ctrl); + } return 0; -- 2.26.2 --000000000000221db805b1d04b7e Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME 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