scsi: aic94xx: 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 address.

Fixes: 2908d77 ("[SCSI] aic94xx: new driver")
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jiasheng Jiang <[email protected]>
Reviewed-by: Jason Yan <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: JiangJias

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;