[SCSI] scsi_dh_hp_sw: Adding the match function for hp_sw device handler

This patch introduces the match function for hp_sw device handler.  Included
the check for TPGS bit before proceeding further per Hannes comment.  The
match function was introduced by commit
6c3633d08acf514e2e89aa95d2346ce9d64d719a

Signed-off-by: Babu Moger <babu.moger@netapp.com>
Acked-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/scsi/device_handler/scsi_dh_hp_sw.c b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
index 0f86a18b157d..084062bb8ee9 100644
--- a/drivers/scsi/device_handler/scsi_dh_hp_sw.c
+++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
@@ -320,6 +320,24 @@ static const struct scsi_dh_devlist hp_sw_dh_data_list[] = {
         {NULL, NULL},
 };
 
+static bool hp_sw_match(struct scsi_device *sdev)
+{
+        int i;
+
+        if (scsi_device_tpgs(sdev))
+                return false;
+
+        for (i = 0; hp_sw_dh_data_list[i].vendor; i++) {
+                if (!strncmp(sdev->vendor, hp_sw_dh_data_list[i].vendor,
+                        strlen(hp_sw_dh_data_list[i].vendor)) &&
+                    !strncmp(sdev->model, hp_sw_dh_data_list[i].model,
+                        strlen(hp_sw_dh_data_list[i].model))) {
+                        return true;
+                }
+        }
+        return false;
+}
+
 static int hp_sw_bus_attach(struct scsi_device *sdev);
 static void hp_sw_bus_detach(struct scsi_device *sdev);
 
@@ -331,6 +349,7 @@ static struct scsi_device_handler hp_sw_dh = {
         .detach         = hp_sw_bus_detach,
         .activate       = hp_sw_activate,
         .prep_fn        = hp_sw_prep_fn,
+        .match          = hp_sw_match,
 };
 
 static int hp_sw_bus_attach(struct scsi_device *sdev)