hpsa: fix handling of hpsa_volume_offline return value

Make return value an int instead of an unsigned char so that
we do not lose negative error return values.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: Webb Scales <webb.scales@hp.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

2 files changed, 9 insertions, 5 deletions

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index af51e7d4e262..31184b35370f 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -2543,11 +2543,11 @@ exit_failed:
 /* Determine offline status of a volume.
  * Return either:
  *  0 (not offline)
- * -1 (offline for unknown reasons)
+ *  0xff (offline for unknown reasons)
  *  # (integer code indicating one of several NOT READY states
  *     describing why a volume is to be kept offline)
  */
-static unsigned char hpsa_volume_offline(struct ctlr_info *h,
+static int hpsa_volume_offline(struct ctlr_info *h,
                                         unsigned char scsi3addr[])
 {
         struct CommandList *c;
@@ -2646,11 +2646,15 @@ static int hpsa_update_device_info(struct ctlr_info *h,
 
         if (this_device->devtype == TYPE_DISK &&
                 is_logical_dev_addr_mode(scsi3addr)) {
+                int volume_offline;
+
                 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
                 if (h->fw_support & MISC_FW_RAID_OFFLOAD_BASIC)
                         hpsa_get_ioaccel_status(h, scsi3addr, this_device);
-                this_device->volume_offline =
-                        hpsa_volume_offline(h, scsi3addr);
+                volume_offline = hpsa_volume_offline(h, scsi3addr);
+                if (volume_offline < 0 || volume_offline > 0xff)
+                        volume_offline = HPSA_VPD_LV_STATUS_UNSUPPORTED;
+                this_device->volume_offline = volume_offline & 0xff;
         } else {
                 this_device->raid_level = RAID_UNKNOWN;
                 this_device->offload_config = 0;
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index 649b463951c6..b5125dc31439 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -151,7 +151,7 @@
 #define HPSA_VPD_HEADER_SZ              4
 
 /* Logical volume states */
-#define HPSA_VPD_LV_STATUS_UNSUPPORTED                  -1
+#define HPSA_VPD_LV_STATUS_UNSUPPORTED                  0xff
 #define HPSA_LV_OK                                      0x0
 #define HPSA_LV_UNDERGOING_ERASE                        0x0F
 #define HPSA_LV_UNDERGOING_RPI                          0x12