Re: [PATCH] scsi: libsas: Add missing check for dma_map_single

[Jason Yan]

Hi Jiasheng,

This patch looks good to me, but can you change your subject to "scsi: 
aic94xx: Add missing check for dma_map_single" since this is not in 
libsas code.

Thanks,
Jason

On 2022/12/28 12:24, Jiasheng Jiang wrote:
> 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")
> Signed-off-by: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
> ---
>   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 ed119a3f6f2e..7f0208300110 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;