1 files changed, 12 insertions, 8 deletions

diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index 3e0abdf76689..56fb9827681e 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -23,7 +23,8 @@
 
 /* general boundary defintions */
 #define SENSEINFOBYTES          32 /* may vary between hbas */
-#define MAXSGENTRIES            31
+#define MAXSGENTRIES            32
+#define HPSA_SG_CHAIN           0x80000000
 #define MAXREPLYQS              256
 
 /* Command Status value */
@@ -305,20 +306,23 @@ struct CommandList {
         int                        cmd_type;
         long                       cmdindex;
         struct hlist_node list;
-        struct CommandList *prev;
-        struct CommandList *next;
         struct request *rq;
         struct completion *waiting;
-        int      retry_count;
         void   *scsi_cmd;
 
 /* on 64 bit architectures, to get this to be 32-byte-aligned
- * it so happens we need no padding, on 32 bit systems,
- * we need 8 bytes of padding.   This does that.
+ * it so happens we need PAD_64 bytes of padding, on 32 bit systems,
+ * we need PAD_32 bytes of padding (see below).   This does that.
+ * If it happens that 64 bit and 32 bit systems need different
+ * padding, PAD_32 and PAD_64 can be set independently, and.
+ * the code below will do the right thing.
  */
-#define COMMANDLIST_PAD ((8 - sizeof(long))/4 * 8)
+#define IS_32_BIT ((8 - sizeof(long))/4)
+#define IS_64_BIT (!IS_32_BIT)
+#define PAD_32 (4)
+#define PAD_64 (4)
+#define COMMANDLIST_PAD (IS_32_BIT * PAD_32 + IS_64_BIT * PAD_64)
         u8 pad[COMMANDLIST_PAD];
-
 };
 
 /* Configuration Table Structure */