scsi: hpsa: correct ioaccel2 chaining

- set ioaccel2_sg_element member 'chain_indicator' to IOACCEL2_LAST_SG for
  the last s/g element.

- set ioaccel2_sg_element member 'chain_indicator' to IOACCEL2_CHAIN when
  chaining.

Reviewed-by: Bader Ali - Saleh <bader.alisaleh@microsemi.com>
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Matt Perricone <matt.perricone@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

2 files changed, 7 insertions, 1 deletions

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 1bef1da273c2..8068520cf89e 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -4940,7 +4940,7 @@ static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
                         curr_sg->reserved[0] = 0;
                         curr_sg->reserved[1] = 0;
                         curr_sg->reserved[2] = 0;
-                        curr_sg->chain_indicator = 0x80;
+                        curr_sg->chain_indicator = IOACCEL2_CHAIN;
 
                         curr_sg = h->ioaccel2_cmd_sg_list[c->cmdindex];
                 }
@@ -4957,6 +4957,11 @@ static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
                         curr_sg++;
                 }
 
+                /*
+                 * Set the last s/g element bit
+                 */
+                (curr_sg - 1)->chain_indicator = IOACCEL2_LAST_SG;
+
                 switch (cmd->sc_data_direction) {
                 case DMA_TO_DEVICE:
                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index 21a726e2eec6..f6afca4b2319 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -517,6 +517,7 @@ struct ioaccel2_sg_element {
         u8 reserved[3];
         u8 chain_indicator;
 #define IOACCEL2_CHAIN 0x80
+#define IOACCEL2_LAST_SG 0x40
 };
 
 /*