From: Niklas Cassel niklas.cassel@wdc.com
[ Upstream commit 7390896b3484d44cbdb8bc4859964314ac66d3c9 ]
Currently, the logic if we should call ata_scsi_set_sense() (and set flag ATA_QCFLAG_SENSE_VALID to indicate that we have successfully added sense data to the struct ata_queued_cmd) looks like this:
if (dev->class == ATA_DEV_ZAC && ((qc->result_tf.status & ATA_SENSE) || qc->result_tf.auxiliary))
The problem with this is that a drive can support the NCQ command error log without supporting NCQ autosense.
On such a drive, if the failing command has sense data, the status field in the NCQ command error log will have the ATA_SENSE bit set.
It is just that this sense data is not included in the NCQ command error log when NCQ autosense is not supported. Instead the sense data has to be fetched using the REQUEST SENSE DATA EXT command.
Therefore, we should only add the sense data if the drive supports NCQ autosense AND the ATA_SENSE bit is set in the status field.
Fix this, and at the same time, remove the duplicated ATA_DEV_ZAC check. The struct ata_taskfile supplied to ata_eh_read_log_10h() is memset:ed before calling the function, so simply checking if qc->result_tf.auxiliary is set is sufficient to tell us that the log actually contained sense data.
Fixes: d238ffd59d3c ("libata: do not attempt to retrieve sense code twice") Signed-off-by: Niklas Cassel niklas.cassel@wdc.com Signed-off-by: Damien Le Moal damien.lemoal@opensource.wdc.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/ata/libata-sata.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c index 13b9d0fdd42c..8e292e2abb04 100644 --- a/drivers/ata/libata-sata.c +++ b/drivers/ata/libata-sata.c @@ -1392,7 +1392,8 @@ static int ata_eh_read_log_10h(struct ata_device *dev, tf->hob_lbah = buf[10]; tf->nsect = buf[12]; tf->hob_nsect = buf[13]; - if (dev->class == ATA_DEV_ZAC && ata_id_has_ncq_autosense(dev->id)) + if (dev->class == ATA_DEV_ZAC && ata_id_has_ncq_autosense(dev->id) && + (tf->status & ATA_SENSE)) tf->auxiliary = buf[14] << 16 | buf[15] << 8 | buf[16];
return 0; @@ -1456,8 +1457,12 @@ void ata_eh_analyze_ncq_error(struct ata_link *link) memcpy(&qc->result_tf, &tf, sizeof(tf)); qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; - if (dev->class == ATA_DEV_ZAC && - ((qc->result_tf.status & ATA_SENSE) || qc->result_tf.auxiliary)) { + + /* + * If the device supports NCQ autosense, ata_eh_read_log_10h() will have + * stored the sense data in qc->result_tf.auxiliary. + */ + if (qc->result_tf.auxiliary) { char sense_key, asc, ascq;
sense_key = (qc->result_tf.auxiliary >> 16) & 0xff;