[PATCH 10/16] scsi_dh_alua: Do not attach to management devices

[Hannes Reinecke]

Management devices should be ignored when
detecting ALUA capabilites.

Signed-off-by: Hannes Reinecke <h...@suse.de>
---
 drivers/scsi/device_handler/scsi_dh_alua.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c 
b/drivers/scsi/device_handler/scsi_dh_alua.c
index e297851..51f4a31 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -315,6 +315,23 @@ static int alua_check_tpgs(struct scsi_device *sdev, 
struct alua_dh_data *h)
 {
        int err = SCSI_DH_OK;
 
+       if (scsi_is_wlun(sdev->lun)) {
+               h->tpgs = TPGS_MODE_NONE;
+               sdev_printk(KERN_INFO, sdev,
+                           "%s: disable for WLUN\n",
+                           ALUA_DH_NAME);
+               return SCSI_DH_DEV_UNSUPP;
+       }
+       if (sdev->type == TYPE_RAID ||
+           sdev->type == TYPE_ENCLOSURE ||
+           sdev->type == 0x1F) {
+               h->tpgs = TPGS_MODE_NONE;
+               sdev_printk(KERN_INFO, sdev,
+                           "%s: disable for enclosure devices\n",
+                           ALUA_DH_NAME);
+               return SCSI_DH_DEV_UNSUPP;
+       }
+
        h->tpgs = scsi_device_tpgs(sdev);
        switch (h->tpgs) {
        case TPGS_MODE_EXPLICIT|TPGS_MODE_IMPLICIT:
-- 
1.7.12.4

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