[PATCH 3/4] libata: Make it possible for host drivers to flag hotplug ports

[Matthew Garrett <mjg@redhat.com>]

Some libata host drivers may be able to provide hotplug information
on a port by port basis. Add a port operation to allow this to be
done, and ensure that it's called during registration.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
---
 drivers/ata/libata-core.c |    4 ++++
 include/linux/libata.h    |    1 +
 2 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 045a486..e4efd68 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6120,6 +6120,10 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 		xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
 					      ap->udma_mask);
 
+		if (ap->ops->is_hotpluggable)
+			ap->scsi_host->hotpluggable =
+				ap->ops->is_hotpluggable(ap);
+
 		if (!ata_port_is_dummy(ap)) {
 			ata_port_printk(ap, KERN_INFO,
 					"%cATA max %s %s\n",
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 3d501db..7b1da91 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -814,6 +814,7 @@ struct ata_port_operations {
 	void (*pmp_detach)(struct ata_port *ap);
 	int  (*enable_pm)(struct ata_port *ap, enum link_pm policy);
 	void (*disable_pm)(struct ata_port *ap);
+	int  (*is_hotpluggable)(struct ata_port *ap);
 
 	/*
 	 * Start, stop, suspend and resume
-- 
1.6.2.5