linux-kernel - [PATCH v12 3/3] ufs: set max_bio

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Date:   Fri,  4 Jun 2021 14:03:24 +0900
From:   Changheun Lee <nanich.lee@...sung.com>
To:     Johannes.Thumshirn@....com, alex_y_xu@...oo.ca,
        asml.silence@...il.com, axboe@...nel.dk, bgoncalv@...hat.com,
        jejb@...ux.ibm.com, martin.petersen@...cle.com,
        cang@...eaurora.org, avri.altman@....com, alim.akhtar@...sung.com,
        bvanassche@....org, damien.lemoal@....com,
        gregkh@...uxfoundation.org, hch@...radead.org, jaegeuk@...nel.org,
        linux-block@...r.kernel.org, linux-scsi@...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,
        yi.zhang@...hat.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 v12 3/3] ufs: set max_bio_bytes with queue max sectors

Set max_bio_bytes same with queue max sectors. It will lead to fast bio
submit when bio size is over than queue max sectors. And it might be helpful
to align submit bio size in some case.

Signed-off-by: Changheun Lee <nanich.lee@...sung.com>
---
 drivers/scsi/ufs/ufshcd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 3eb54937f1d8..37365a726517 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4858,6 +4858,7 @@ static int ufshcd_slave_configure(struct scsi_device *sdev)
 {
 	struct ufs_hba *hba = shost_priv(sdev->host);
 	struct request_queue *q = sdev->request_queue;
+	unsigned int max_bio_bytes;
 
 	blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1);
 	if (hba->quirks & UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE)
@@ -4868,6 +4869,10 @@ static int ufshcd_slave_configure(struct scsi_device *sdev)
 
 	ufshcd_crypto_setup_rq_keyslot_manager(hba, q);
 
+	if (!check_shl_overflow(queue_max_sectors(q),
+				SECTOR_SHIFT, &max_bio_bytes))
+		blk_queue_max_bio_bytes(q, max_bio_bytes);
+
 	return 0;
 }
 
-- 
2.29.0