[SCSI] sas: unify the pointlessly separated enums sas_dev_type and sas_device_type

These enums have been separate since the dawn of SAS, mainly because the
latter is a procotol only enum and the former includes additional state
for libsas.  The dichotomy causes endless confusion about which one you
should use where and leads to pointless warnings like this:

drivers/scsi/mvsas/mv_sas.c: In function 'mvs_update_phyinfo':
drivers/scsi/mvsas/mv_sas.c:1162:34: warning: comparison between 'enum sas_device_type' and 'enum sas_dev_type' [-Wenum-compare]

Fix by eliminating one of them.  The one kept is effectively the sas.h
one, but call it sas_device_type and make sure the enums are all
properly namespaced with the SAS_ prefix.

Signed-off-by: James Bottomley <JBottomley@Parallels.com>

4 files changed, 16 insertions, 21 deletions

diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index ef937b56f9b5..e2c1e66d58ae 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -118,7 +118,7 @@ struct ex_phy {
 
         enum ex_phy_state phy_state;
 
-        enum sas_dev_type attached_dev_type;
+        enum sas_device_type attached_dev_type;
         enum sas_linkrate linkrate;
 
         u8   attached_sata_host:1;
@@ -195,7 +195,7 @@ enum {
 
 struct domain_device {
         spinlock_t done_lock;
-        enum sas_dev_type dev_type;
+        enum sas_device_type dev_type;
 
         enum sas_linkrate linkrate;
         enum sas_linkrate min_linkrate;
diff --git a/include/scsi/sas.h b/include/scsi/sas.h
index be3eb0bf1ac0..0d2607d12387 100644
--- a/include/scsi/sas.h
+++ b/include/scsi/sas.h
@@ -90,16 +90,18 @@ enum sas_oob_mode {
 };
 
 /* See sas_discover.c if you plan on changing these */
-enum sas_dev_type {
-        NO_DEVICE   = 0,          /* protocol */
-        SAS_END_DEV = 1,          /* protocol */
-        EDGE_DEV    = 2,          /* protocol */
-        FANOUT_DEV  = 3,          /* protocol */
-        SAS_HA      = 4,
-        SATA_DEV    = 5,
-        SATA_PM     = 7,
-        SATA_PM_PORT= 8,
-        SATA_PENDING  = 9,
+enum sas_device_type {
+        /* these are SAS protocol defined (attached device type field) */
+        SAS_PHY_UNUSED = 0,
+        SAS_END_DEVICE = 1,
+        SAS_EDGE_EXPANDER_DEVICE = 2,
+        SAS_FANOUT_EXPANDER_DEVICE = 3,
+        /* these are internal to libsas */
+        SAS_HA = 4,
+        SAS_SATA_DEV = 5,
+        SAS_SATA_PM = 7,
+        SAS_SATA_PM_PORT = 8,
+        SAS_SATA_PENDING = 9,
 };
 
 enum sas_protocol {
diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h
index ff71a5654684..00f41aeeecf5 100644
--- a/include/scsi/sas_ata.h
+++ b/include/scsi/sas_ata.h
@@ -32,8 +32,8 @@
 
 static inline int dev_is_sata(struct domain_device *dev)
 {
-        return dev->dev_type == SATA_DEV || dev->dev_type == SATA_PM ||
-               dev->dev_type == SATA_PM_PORT || dev->dev_type == SATA_PENDING;
+        return dev->dev_type == SAS_SATA_DEV || dev->dev_type == SAS_SATA_PM ||
+               dev->dev_type == SAS_SATA_PM_PORT || dev->dev_type == SAS_SATA_PENDING;
 }
 
 int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy);
diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h
index 9b8e08879cfc..0bd71e2702e3 100644
--- a/include/scsi/scsi_transport_sas.h
+++ b/include/scsi/scsi_transport_sas.h
@@ -10,13 +10,6 @@ struct scsi_transport_template;
 struct sas_rphy;
 struct request;
 
-enum sas_device_type {
-        SAS_PHY_UNUSED = 0,
-        SAS_END_DEVICE = 1,
-        SAS_EDGE_EXPANDER_DEVICE = 2,
-        SAS_FANOUT_EXPANDER_DEVICE = 3,
-};
-
 static inline int sas_protocol_ata(enum sas_protocol proto)
 {
         return ((proto & SAS_PROTOCOL_SATA) ||