diff options
Diffstat (limited to 'drivers/ata/libata-scsi.c')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 87597a3f6149..49c09d876358 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -323,10 +323,16 @@ static ssize_t ata_ncq_prio_enable_store(struct device *device, goto unlock; } - if (input) + if (input) { + if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) { + rc = -EOPNOTSUPP; + goto unlock; + } + dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE; - else + } else { dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; + } unlock: spin_unlock_irqrestore(ap->lock, flags); |