diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 6c4e567b6582..374993031895 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4188,6 +4188,9 @@ static const struct ata_dev_quirks_entry __ata_dev_quirks[] = {
 	{ "ST3320[68]13AS",	"SD1[5-9]",	ATA_QUIRK_NONCQ |
 						ATA_QUIRK_FIRMWARE_WARN },
 
+	/* ADATA devices with LPM issues. */
+	{ "ADATA SU680",	NULL,		ATA_QUIRK_NOLPM },
+
 	/* Seagate disks with LPM issues */
 	{ "ST1000DM010-2EP102",	NULL,		ATA_QUIRK_NOLPM },
 	{ "ST2000DM008-2FR102",	NULL,		ATA_QUIRK_NOLPM },
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index ad798e5246b4..3b65df914ebb 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3600,7 +3600,7 @@ static unsigned int ata_scsiop_maint_in(struct ata_device *dev,
 
 	if (cdb[2] != 1 && cdb[2] != 3) {
 		ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
-		ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
+		ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
 		return 0;
 	}