[PATCH v3 01/31] scsi: libsas: Fix sas_ata_qc_issue() handling of NCQ NON DATA commands

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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()".

Fixes: 176ddd89171d ("scsi: libsas: Reset num_scatter if libata marks qc as NODATA")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx>
---
 drivers/scsi/libsas/sas_ata.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index e0030a093994..50f779088b6e 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -197,7 +197,7 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
 		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)
-- 
2.34.1




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Device Mapper]

  Powered by Linux