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libata: Implement NCQ autosense

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Some newer devices support NCQ autosense (cf ACS-4), so we should
be using it to retrieve the sense code and speed up recovery.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Hannes Reinecke
2015-03-27 16:46:35 +01:00
committed by Tejun Heo
parent 1308d7f010
commit 42b966fbf3
4 changed files with 28 additions and 2 deletions
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9
drivers/ata/libata-scsi.c
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@@ -270,8 +270,11 @@ DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
ata_scsi_park_show, ata_scsi_park_store);
EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
{
if (!cmd)
return;
cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
@@ -1777,7 +1780,9 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
((cdb[2] & 0x20) || need_sense)) {
ata_gen_passthru_sense(qc);
} else {
if (!need_sense) {
if (qc->flags & ATA_QCFLAG_SENSE_VALID) {
cmd->result = SAM_STAT_CHECK_CONDITION;
} else if (!need_sense) {
cmd->result = SAM_STAT_GOOD;
} else {
/* TODO: decide which descriptor format to use