linux-kernel - [PATCH] scsi: qla2xxx: Add missing check for dma_map

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Message-Id: <20221228033352.48237-1-jiasheng@iscas.ac.cn>
Date:   Wed, 28 Dec 2022 11:33:52 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     njavali@...vell.com, GR-QLogic-Storage-Upstream@...vell.com,
        jejb@...ux.ibm.com, martin.petersen@...cle.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] scsi: qla2xxx: Add missing check for dma_map_single

Add check for dma_map_single and return error if it fails in order
to avoid invalid dma being used by dma_sync_single_for_device.

Fixes: e84067d74301 ("scsi: qla2xxx: Add FC-NVMe F/W initialization and transport registration")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/scsi/qla2xxx/qla_nvme.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index 02fdeb0d31ec..28e75bfd8a3a 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -367,6 +367,9 @@ static int qla_nvme_ls_req(struct nvme_fc_local_port *lport,
 	nvme->u.nvme.timeout_sec = fd->timeout;
 	nvme->u.nvme.cmd_dma = dma_map_single(&ha->pdev->dev, fd->rqstaddr,
 	    fd->rqstlen, DMA_TO_DEVICE);
+	if (dma_mapping_error(&ha->pdev->dev, nvme->u.nvme.cmd_dma))
+		return rval;
+
 	dma_sync_single_for_device(&ha->pdev->dev, nvme->u.nvme.cmd_dma,
 	    fd->rqstlen, DMA_TO_DEVICE);
 
-- 
2.25.1