linux-kernel - [PATCH v6 2/3] ufs: set QUEUE_FLAG_LIMIT_BIO

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Date:   Mon, 12 Apr 2021 11:58:30 +0900
From:   Changheun Lee <nanich.lee@...sung.com>
To:     damien.lemoal@....com, bvanassche@....org,
        Johannes.Thumshirn@....com, asml.silence@...il.com,
        axboe@...nel.dk, gregkh@...uxfoundation.org, hch@...radead.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        ming.lei@...hat.com, osandov@...com, patchwork-bot@...nel.org,
        tj@...nel.org, tom.leiming@...il.com
Cc:     jisoo2146.oh@...sung.com, junho89.kim@...sung.com,
        mj0123.lee@...sung.com, seunghwan.hyun@...sung.com,
        sookwan7.kim@...sung.com, woosung2.lee@...sung.com,
        yt0928.kim@...sung.com, Changheun Lee <nanich.lee@...sung.com>
Subject: [PATCH v6 2/3] ufs: set QUEUE_FLAG_LIMIT_BIO_SIZE

Set QUEUE_FLAG_LIMIT_BIO_SIZE queue flag to limit bio max size to
queue max sectors size for UFS device.

Signed-off-by: Changheun Lee <nanich.lee@...sung.com>
---
 drivers/scsi/scsi_lib.c   | 2 ++
 drivers/scsi/ufs/ufshcd.c | 1 +
 include/scsi/scsi_host.h  | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 7d52a11e1b61..73ce6ba7903a 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1838,6 +1838,8 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
 	 * Devices that require a bigger alignment can increase it later.
 	 */
 	blk_queue_dma_alignment(q, max(4, dma_get_cache_alignment()) - 1);
+
+	blk_queue_set_limit_bio_size(q, shost->limit_bio_size);
 }
 EXPORT_SYMBOL_GPL(__scsi_init_queue);
 
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index d3d05e997c13..000eb5ab022e 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -9313,6 +9313,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 	host->max_channel = UFSHCD_MAX_CHANNEL;
 	host->unique_id = host->host_no;
 	host->max_cmd_len = UFS_CDB_SIZE;
+	host->limit_bio_size = true;
 
 	hba->max_pwr_info.is_valid = false;
 
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index e30fd963b97d..486f61588717 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -607,6 +607,8 @@ struct Scsi_Host {
 	unsigned int max_segment_size;
 	unsigned long dma_boundary;
 	unsigned long virt_boundary_mask;
+	unsigned int limit_bio_size;
+
 	/*
 	 * In scsi-mq mode, the number of hardware queues supported by the LLD.
 	 *
-- 
2.29.0