scsi: libsas: Fix sas_ata_qc_issue() handling of NCQ NON DATA commands
authorDamien Le Moal <damien.lemoal@opensource.wdc.com>
Sun, 20 Feb 2022 03:17:40 +0000 (12:17 +0900)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 8 Apr 2022 12:39:52 +0000 (14:39 +0200)
commitaa28075f06b821a7988053cb9b77edc0c9ea4f0d
treece5250ab76fbb45adfe7decd13fa515c653c739b
parent4bcefc78c87409da495eda4afe12b37ef5aa9ea1
scsi: libsas: Fix sas_ata_qc_issue() handling of NCQ NON DATA commands

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.wdc.com
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