[PATCH] sata_nv: add hotplug support

Add hotplug support.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/scsi/sata_nv.c b/drivers/scsi/sata_nv.c
index 2a1bd85404e0..19deaa42fbf0 100644
--- a/drivers/scsi/sata_nv.c
+++ b/drivers/scsi/sata_nv.c
@@ -69,7 +69,8 @@ enum {
         NV_INT_PORT_SHIFT               = 4,    /* each port occupies 4 bits */
 
         NV_INT_ALL                      = 0x0f,
-        NV_INT_MASK                     = NV_INT_DEV,
+        NV_INT_MASK                     = NV_INT_DEV |
+                                          NV_INT_ADDED | NV_INT_REMOVED,
 
         /* INT_CONFIG */
         NV_INT_CONFIG                   = 0x12,
@@ -324,6 +325,12 @@ static int nv_host_intr(struct ata_port *ap, u8 irq_stat)
         struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
         int handled;
 
+        /* freeze if hotplugged */
+        if (unlikely(irq_stat & (NV_INT_ADDED | NV_INT_REMOVED))) {
+                ata_port_freeze(ap);
+                return 1;
+        }
+
         /* bail out if not our interrupt */
         if (!(irq_stat & NV_INT_DEV))
                 return 0;