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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Varun Prakash <varun@chelsio.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 3.18 56/86] scsi: csiostor: fix missing data copy in csio_scsi_err_handler()
Date:   Wed, 15 May 2019 12:55:33 +0200
Message-Id: <20190515090653.710104328@linuxfoundation.org>
In-Reply-To: <20190515090642.339346723@linuxfoundation.org>
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[ Upstream commit 5c2442fd78998af60e13aba506d103f7f43f8701 ]

If scsi cmd sglist is not suitable for DDP then csiostor driver uses
preallocated buffers for DDP, because of this data copy is required from
DDP buffer to scsi cmd sglist before calling ->scsi_done().

Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/csiostor/csio_scsi.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/csiostor/csio_scsi.c b/drivers/scsi/csiostor/csio_scsi.c
index 86103c8475d8e..fbb2052bc4129 100644
--- a/drivers/scsi/csiostor/csio_scsi.c
+++ b/drivers/scsi/csiostor/csio_scsi.c
@@ -1737,8 +1737,11 @@ csio_scsi_err_handler(struct csio_hw *hw, struct csio_ioreq *req)
 	}
 
 out:
-	if (req->nsge > 0)
+	if (req->nsge > 0) {
 		scsi_dma_unmap(cmnd);
+		if (req->dcopy && (host_status == DID_OK))
+			host_status = csio_scsi_copy_to_sgl(hw, req);
+	}
 
 	cmnd->result = (((host_status) << 16) | scsi_status);
 	cmnd->scsi_done(cmnd);
-- 
2.20.1