[SCSI] qla2xxx: Enable CRB based doorbell posting for request queue as default for ISP 82xx.

Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 9 insertions, 4 deletions

diff --git a/drivers/scsi/qla2xxx/qla_nx.c b/drivers/scsi/qla2xxx/qla_nx.c
index ee575b4efbee..e3e3ebdfe5d9 100644
--- a/drivers/scsi/qla2xxx/qla_nx.c
+++ b/drivers/scsi/qla2xxx/qla_nx.c
@@ -3372,11 +3372,16 @@ qla82xx_start_iocbs(srb_t *sp)
         dbval = 0x04 | (ha->portnum << 5);
 
         dbval = dbval | (req->id << 8) | (req->ring_index << 16);
-        WRT_REG_DWORD((unsigned long __iomem *)ha->nxdb_wr_ptr, dbval);
-        wmb();
-        while (RD_REG_DWORD(ha->nxdb_rd_ptr) != dbval) {
-                WRT_REG_DWORD((unsigned long  __iomem *)ha->nxdb_wr_ptr, dbval);
+        if (ql2xdbwr)
+                qla82xx_wr_32(ha, ha->nxdb_wr_ptr, dbval);
+        else {
+                WRT_REG_DWORD((unsigned long __iomem *)ha->nxdb_wr_ptr, dbval);
                 wmb();
+                while (RD_REG_DWORD(ha->nxdb_rd_ptr) != dbval) {
+                        WRT_REG_DWORD((unsigned long  __iomem *)ha->nxdb_wr_ptr,
+                                dbval);
+                        wmb();
+                }
         }
 }