The sd driver issues a flush cache when suspending, and this was causing
a sleeping drive to wake up for no reason. Another sleep or standby
command when the drive is already sleeping obviously should also not cause
the disk to spin up.
---
drivers/ata/libata-core.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c53c210..25d141e 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5092,7 +5092,11 @@ void ata_qc_issue(struct ata_queued_cmd *qc)
/* if device is sleeping, schedule reset and abort the link */
if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
- if (unlikely(qc->tf.command == ATA_CMD_CHK_POWER))
+ if (unlikely(qc->tf.command == ATA_CMD_CHK_POWER ||
+ qc->tf.command == ATA_CMD_SLEEP ||
+ qc->tf.command == ATA_CMD_FLUSH ||
+ qc->tf.command == ATA_CMD_FLUSH_EXT ||
+ qc->tf.command == ATA_CMD_STANDBYNOW1))
{
/* fake reply to avoid waking drive */
qc->flags &= ~ATA_QCFLAG_RESULT_TF;
--
1.8.3.2
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