[SCSI] hpsa: mark last scatter gather element as the last

This is normally optional, but for SSD Smart Path support (in
subsequent patches) it is required.

Signed-off-by: Matt Gates <matthew.gates@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index eed5f03..f867e46 100644 (file)
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -1438,6 +1438,7 @@ static int hpsa_map_one(struct pci_dev *pdev,
        cp->SG[0].Addr.upper =
          (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
        cp->SG[0].Len = buflen;
+       cp->SG[0].Ext = HPSA_SG_LAST; /* we are not chaining */
        cp->Header.SGList = (u8) 1;   /* no. SGs contig in this cmd */
        cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
        return 0;
@@ -2139,7 +2140,7 @@ static int hpsa_scatter_gather(struct ctlr_info *h,
                curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
                curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
                curr_sg->Len = len;
-               curr_sg->Ext = 0;  /* we are not chaining */
+               curr_sg->Ext = (i < scsi_sg_count(cmd) - 1) ? 0 : HPSA_SG_LAST;
                curr_sg++;
        }
 
@@ -3041,7 +3042,7 @@ static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
                c->SG[0].Addr.lower = temp64.val32.lower;
                c->SG[0].Addr.upper = temp64.val32.upper;
                c->SG[0].Len = iocommand.buf_size;
-               c->SG[0].Ext = 0; /* we are not chaining*/
+               c->SG[0].Ext = HPSA_SG_LAST; /* we are not chaining*/
        }
        hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);
        if (iocommand.buf_size > 0)
@@ -3171,8 +3172,7 @@ static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
                        c->SG[i].Addr.lower = temp64.val32.lower;
                        c->SG[i].Addr.upper = temp64.val32.upper;
                        c->SG[i].Len = buff_size[i];
-                       /* we are not chaining */
-                       c->SG[i].Ext = 0;
+                       c->SG[i].Ext = i < sg_used - 1 ? 0 : HPSA_SG_LAST;
                }
        }
        hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);

diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index 3f96b66..22cf799 100644 (file)
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -25,6 +25,7 @@
 #define SENSEINFOBYTES          32 /* may vary between hbas */
 #define SG_ENTRIES_IN_CMD      32 /* Max SG entries excluding chain blocks */
 #define HPSA_SG_CHAIN          0x80000000
+#define HPSA_SG_LAST           0x40000000
 #define MAXREPLYQS              256
 
 /* Command Status value */