Merge tag 'm68knommu-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-microblaze.git] / drivers / ata / libata-sata.c

diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c
index dc397eb..8f3ff83 100644 (file)
--- a/drivers/ata/libata-sata.c
+++ b/drivers/ata/libata-sata.c
@@ -834,6 +834,30 @@ DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
            ata_scsi_lpm_show, ata_scsi_lpm_store);
 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
 
+static ssize_t ata_ncq_prio_supported_show(struct device *device,
+                                          struct device_attribute *attr,
+                                          char *buf)
+{
+       struct scsi_device *sdev = to_scsi_device(device);
+       struct ata_port *ap = ata_shost_to_port(sdev->host);
+       struct ata_device *dev;
+       bool ncq_prio_supported;
+       int rc = 0;
+
+       spin_lock_irq(ap->lock);
+       dev = ata_scsi_find_dev(ap, sdev);
+       if (!dev)
+               rc = -ENODEV;
+       else
+               ncq_prio_supported = dev->flags & ATA_DFLAG_NCQ_PRIO;
+       spin_unlock_irq(ap->lock);
+
+       return rc ? rc : sysfs_emit(buf, "%u\n", ncq_prio_supported);
+}
+
+DEVICE_ATTR(ncq_prio_supported, S_IRUGO, ata_ncq_prio_supported_show, NULL);
+EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_supported);
+
 static ssize_t ata_ncq_prio_enable_show(struct device *device,
                                        struct device_attribute *attr,
                                        char *buf)
@@ -901,6 +925,7 @@ EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
 struct device_attribute *ata_ncq_sdev_attrs[] = {
        &dev_attr_unload_heads,
        &dev_attr_ncq_prio_enable,
+       &dev_attr_ncq_prio_supported,
        NULL
 };
 EXPORT_SYMBOL_GPL(ata_ncq_sdev_attrs);