From: Damien Le Moal damien.lemoal@opensource.wdc.com
commit 8454563e4c2aafbfb81a383ab423ea8b9b430a25 upstream.
To detect for the DMA_NONE (no data transfer) DMA direction, sas_ata_qc_issue() tests if the command protocol is ATA_PROT_NODATA. This test does not include the ATA_CMD_NCQ_NON_DATA command as this command protocol is defined as ATA_PROT_NCQ_NODATA (equal to ATA_PROT_FLAG_NCQ) and not as ATA_PROT_NODATA.
To include both NCQ and non-NCQ commands when testing for the DMA_NONE DMA direction, use "!ata_is_data()".
Link: https://lore.kernel.org/r/20220220031810.738362-2-damien.lemoal@opensource.w... Fixes: 176ddd89171d ("scsi: libsas: Reset num_scatter if libata marks qc as NODATA") Cc: stable@vger.kernel.org Reviewed-by: John Garry john.garry@huawei.com Reviewed-by: Jack Wang jinpu.wang@ionos.com Signed-off-by: Damien Le Moal damien.lemoal@opensource.wdc.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/scsi/libsas/sas_ata.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -220,7 +220,7 @@ static unsigned int sas_ata_qc_issue(str task->total_xfer_len = qc->nbytes; task->num_scatter = qc->n_elem; task->data_dir = qc->dma_dir; - } else if (qc->tf.protocol == ATA_PROT_NODATA) { + } else if (!ata_is_data(qc->tf.protocol)) { task->data_dir = DMA_NONE; } else { for_each_sg(qc->sg, sg, qc->n_elem, si)