linux-kernel - [PATCH v4 1/5] scsi: ufs: core: Fix mcq tag calcualtion

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Message-ID: <20230307065448.15279-2-powen.kao@mediatek.com>
Date:   Tue, 7 Mar 2023 14:54:42 +0800
From:   Po-Wen Kao <powen.kao@...iatek.com>
To:     <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Bart Van Assche <bvanassche@....org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <wsd_upstream@...iatek.com>, <peter.wang@...iatek.com>,
        <stanley.chu@...iatek.com>, <powen.kao@...iatek.com>,
        <alice.chao@...iatek.com>, <naomi.chu@...iatek.com>,
        <chun-hung.wu@...iatek.com>, <cc.chou@...iatek.com>,
        <eddie.huang@...iatek.com>, <mason.zhang@...iatek.com>,
        <chaotian.jing@...iatek.com>, <jiajie.hao@...iatek.com>
Subject: [PATCH v4 1/5] scsi: ufs: core: Fix mcq tag calcualtion

Transfer command descriptor is allocated in ufshcd_memory_alloc()
and referenced by transfer request descriptor with stride size
sizeof_utp_transfer_cmd_desc()
instead of
sizeof(struct utp_transfer_cmd_desc).

Consequently, computing tag by address offset should also refer to the
same stride.

Signed-off-by: Po-Wen Kao <powen.kao@...iatek.com>
Reviewed-by: Bart Van Assche <bvanassche@....org>
Reviewed-by: Manivannan Sadhasivam <mani@...nel.org>
Reviewed-by: Stanley Chu <stanley.chu@...iatek.com>
Reviewed-by: Ziqi Chen <quic_ziqichen@...cinc.com>
---
 drivers/ufs/core/ufs-mcq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
index 31df052fbc41..3a27fa4b0024 100644
--- a/drivers/ufs/core/ufs-mcq.c
+++ b/drivers/ufs/core/ufs-mcq.c
@@ -265,7 +265,7 @@ static int ufshcd_mcq_get_tag(struct ufs_hba *hba,
 	addr = (le64_to_cpu(cqe->command_desc_base_addr) & CQE_UCD_BA) -
 		hba->ucdl_dma_addr;
 
-	return div_u64(addr, sizeof(struct utp_transfer_cmd_desc));
+	return div_u64(addr, sizeof_utp_transfer_cmd_desc(hba));
 }
 
 static void ufshcd_mcq_process_cqe(struct ufs_hba *hba,
-- 
2.18.0