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-rw-r--r--drivers/ata/libata-core.c1
-rw-r--r--drivers/ata/libata-scsi.c29
-rw-r--r--include/linux/libata.h2
3 files changed, 32 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 1e5d0a36a0a..ddf8e486278 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6668,6 +6668,7 @@ EXPORT_SYMBOL_GPL(ata_dummy_port_info);
EXPORT_SYMBOL_GPL(ata_link_next);
EXPORT_SYMBOL_GPL(ata_dev_next);
EXPORT_SYMBOL_GPL(ata_std_bios_param);
+EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
EXPORT_SYMBOL_GPL(ata_host_init);
EXPORT_SYMBOL_GPL(ata_host_alloc);
EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index cfa9dd3d725..a54273d2c3c 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -415,6 +415,35 @@ int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
}
/**
+ * ata_scsi_unlock_native_capacity - unlock native capacity
+ * @sdev: SCSI device to adjust device capacity for
+ *
+ * This function is called if a partition on @sdev extends beyond
+ * the end of the device. It requests EH to unlock HPA.
+ *
+ * LOCKING:
+ * Defined by the SCSI layer. Might sleep.
+ */
+void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
+{
+ struct ata_port *ap = ata_shost_to_port(sdev->host);
+ struct ata_device *dev;
+ unsigned long flags;
+
+ spin_lock_irqsave(ap->lock, flags);
+
+ dev = ata_scsi_find_dev(ap, sdev);
+ if (dev && dev->n_sectors < dev->n_native_sectors) {
+ dev->flags |= ATA_DFLAG_UNLOCK_HPA;
+ dev->link->eh_info.action |= ATA_EH_RESET;
+ ata_port_schedule_eh(ap);
+ }
+
+ spin_unlock_irqrestore(ap->lock, flags);
+ ata_port_wait_eh(ap);
+}
+
+/**
* ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
* @ap: target port
* @sdev: SCSI device to get identify data for
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 3bad2701bfa..b85f3ff34d7 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1023,6 +1023,7 @@ extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
extern int ata_std_bios_param(struct scsi_device *sdev,
struct block_device *bdev,
sector_t capacity, int geom[]);
+extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
extern int ata_scsi_slave_config(struct scsi_device *sdev);
extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
@@ -1174,6 +1175,7 @@ extern struct device_attribute *ata_common_sdev_attrs[];
.slave_configure = ata_scsi_slave_config, \
.slave_destroy = ata_scsi_slave_destroy, \
.bios_param = ata_std_bios_param, \
+ .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
.sdev_attrs = ata_common_sdev_attrs
#define ATA_NCQ_SHT(drv_name) \