linux-kernel - [PATCH 5.10 166/299] scsi: smartpqi: Use host-wide tag space

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Date:   Mon, 10 May 2021 12:19:23 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ming Lei <ming.lei@...hat.com>,
        John Garry <john.garry@...wei.com>,
        Scott Benesh <scott.benesh@...rochip.com>,
        Scott Teel <scott.teel@...rochip.com>,
        Mike McGowen <mike.mcgowen@...rochip.com>,
        Kevin Barnett <kevin.barnett@...rochip.com>,
        Don Brace <don.brace@...rochip.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 166/299] scsi: smartpqi: Use host-wide tag space

From: Don Brace <don.brace@...rochip.com>

[ Upstream commit c6d3ee209b9e863c6251f72101511340451ca324 ]

Correct SCSI midlayer sending more requests than exposed host queue depth
causing firmware ASSERT and lockup issues by enabling host-wide tags.

Note: This also results in better performance.

Link: https://lore.kernel.org/r/161549369787.25025.8975999483518581619.stgit@brunhilda
Suggested-by: Ming Lei <ming.lei@...hat.com>
Suggested-by: John Garry <john.garry@...wei.com>
Reviewed-by: Scott Benesh <scott.benesh@...rochip.com>
Reviewed-by: Scott Teel <scott.teel@...rochip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@...rochip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@...rochip.com>
Signed-off-by: Don Brace <don.brace@...rochip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/smartpqi/smartpqi_init.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index 9d0229656681..9300a677510d 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -6601,6 +6601,7 @@ static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
 	shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
 	shost->unique_id = shost->irq;
 	shost->nr_hw_queues = ctrl_info->num_queue_groups;
+	shost->host_tagset = 1;
 	shost->hostdata[0] = (unsigned long)ctrl_info;
 
 	rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
-- 
2.30.2