From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Date: Sat, 28 Jan 2023 19:08:32 +0800
Subject: [PATCH] scsi: aic94xx: Add missing check for dma_map_single()
References: bsc#1012628
Patch-mainline: 6.2.3
Git-commit: 32fe45274edb5926abc0fac7263d9f889d02d9cf

[ Upstream commit 32fe45274edb5926abc0fac7263d9f889d02d9cf ]

Add check for dma_map_single() and return error if it fails in order to
avoid invalid DMA address.

Fixes: 2908d778ab3e ("[SCSI] aic94xx: new driver")
Link: https://lore.kernel.org/r/20230128110832.6792-1-jiasheng@iscas.ac.cn
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/scsi/aic94xx/aic94xx_task.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/aic94xx/aic94xx_task.c b/drivers/scsi/aic94xx/aic94xx_task.c
index ed119a3f..7f020830 100644
--- a/drivers/scsi/aic94xx/aic94xx_task.c
+++ b/drivers/scsi/aic94xx/aic94xx_task.c
@@ -50,6 +50,9 @@ static int asd_map_scatterlist(struct sas_task *task,
 		dma_addr_t dma = dma_map_single(&asd_ha->pcidev->dev, p,
 						task->total_xfer_len,
 						task->data_dir);
+		if (dma_mapping_error(&asd_ha->pcidev->dev, dma))
+			return -ENOMEM;
+
 		sg_arr[0].bus_addr = cpu_to_le64((u64)dma);
 		sg_arr[0].size = cpu_to_le32(task->total_xfer_len);
 		sg_arr[0].flags |= ASD_SG_EL_LIST_EOL;
-- 
2.35.3