linux-kernel - [PATCH 5.9 226/757] scsi: ufs: Make ufshcd_print_trs() consider UFSHCD_QUIRK_PRDT_BYTE

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Date:   Tue, 27 Oct 2020 14:47:56 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alim Akhtar <alim.akhtar@...sung.com>,
        Kiwoong Kim <kwmad.kim@...sung.com>,
        Eric Biggers <ebiggers@...gle.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.9 226/757] scsi: ufs: Make ufshcd_print_trs() consider UFSHCD_QUIRK_PRDT_BYTE_GRAN

From: Eric Biggers <ebiggers@...gle.com>

[ Upstream commit cc770ce34aeeff21991f162f0db1a758ea672727 ]

Fix ufshcd_print_trs() to consider UFSHCD_QUIRK_PRDT_BYTE_GRAN when using
utp_transfer_req_desc::prd_table_length, so that it doesn't treat the
number of bytes as the number of entries.

Originally from Kiwoong Kim
(https://lkml.kernel.org/r/20200218233115.8185-1-kwmad.kim@samsung.com).

Link: https://lore.kernel.org/r/20200826021040.152148-1-ebiggers@kernel.org
Fixes: 26f968d7de82 ("scsi: ufs: Introduce UFSHCD_QUIRK_PRDT_BYTE_GRAN quirk")
Cc: Alim Akhtar <alim.akhtar@...sung.com>
Cc: Kiwoong Kim <kwmad.kim@...sung.com>
Signed-off-by: Eric Biggers <ebiggers@...gle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/ufs/ufshcd.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 1d157ff58d817..316b861305eae 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -474,6 +474,9 @@ void ufshcd_print_trs(struct ufs_hba *hba, unsigned long bitmap, bool pr_prdt)
 
 		prdt_length = le16_to_cpu(
 			lrbp->utr_descriptor_ptr->prd_table_length);
+		if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN)
+			prdt_length /= sizeof(struct ufshcd_sg_entry);
+
 		dev_err(hba->dev,
 			"UPIU[%d] - PRDT - %d entries  phys@...llx\n",
 			tag, prdt_length,
-- 
2.25.1