linux-kernel - [PATCH AUTOSEL 5.15 38/98] scsi: mpi3mr: Fix reporting of actual data transfer size

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Date:   Fri,  1 Apr 2022 10:36:42 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>, sathya.prakash@...adcom.com,
        kashyap.desai@...adcom.com, sumit.saxena@...adcom.com,
        jejb@...ux.ibm.com, mpi3mr-linuxdrv.pdl@...adcom.com,
        linux-scsi@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 38/98] scsi: mpi3mr: Fix reporting of actual data transfer size

From: Sreekanth Reddy <sreekanth.reddy@...adcom.com>

[ Upstream commit 9992246127246a27cc7184f05cce6f62ac48f84e ]

The driver is missing to set the residual size while completing an
I/O. Ensure proper data transfer size is reported to the kernel on I/O
completion based on the transfer length reported by the firmware.

Link: https://lore.kernel.org/r/20220210095817.22828-7-sreekanth.reddy@broadcom.com
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@...adcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/mpi3mr/mpi3mr_os.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c
index 3cae8803383b..b2c650542bac 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_os.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
@@ -2204,6 +2204,8 @@ void mpi3mr_process_op_reply_desc(struct mpi3mr_ioc *mrioc,
 		scmd->result = DID_OK << 16;
 		goto out_success;
 	}
+
+	scsi_set_resid(scmd, scsi_bufflen(scmd) - xfer_count);
 	if (ioc_status == MPI3_IOCSTATUS_SCSI_DATA_UNDERRUN &&
 	    xfer_count == 0 && (scsi_status == MPI3_SCSI_STATUS_BUSY ||
 	    scsi_status == MPI3_SCSI_STATUS_RESERVATION_CONFLICT ||
-- 
2.34.1