[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>

2 files changed, 10 insertions, 5 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();
+                }
         }
 }
 
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index bc35ecfbc28f..5be8db748964 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -140,7 +140,7 @@ MODULE_PARM_DESC(ql2xetsenable,
                 "Enables firmware ETS burst."
                 "Default is 0 - skip ETS enablement.");
 
-int ql2xdbwr;
+int ql2xdbwr = 1;
 module_param(ql2xdbwr, int, S_IRUGO|S_IRUSR);
 MODULE_PARM_DESC(ql2xdbwr,
         "Option to specify scheme for request queue posting\n"