===== drivers/scsi/qla1280.c 1.65 vs edited =====
--- 1.65/drivers/scsi/qla1280.c	2004-07-28 20:59:10 -07:00
+++ edited/drivers/scsi/qla1280.c	2004-09-23 14:58:03 -07:00
@@ -3398,7 +3398,7 @@
 	sp->flags |= SRB_SENT;
 	ha->actthreads++;
 	WRT_REG_WORD(&reg->mailbox4, ha->req_ring_index);
-	(void) RD_REG_WORD(&reg->mailbox4); /* PCI posted write flush */
+	mmiowb(); /* make sure this write arrives before any others */
 
  out:
 	if (status)
@@ -3666,7 +3666,7 @@
 	sp->flags |= SRB_SENT;
 	ha->actthreads++;
 	WRT_REG_WORD(&reg->mailbox4, ha->req_ring_index);
-	(void) RD_REG_WORD(&reg->mailbox4); /* PCI posted write flush */
+	mmiowb(); /* make sure this write arrives before any others */
 
 out:
 	if (status)
@@ -3778,7 +3778,7 @@
 
 	/* Set chip new ring index. */
 	WRT_REG_WORD(&reg->mailbox4, ha->req_ring_index);
-	(void) RD_REG_WORD(&reg->mailbox4); /* PCI posted write flush */
+	mmiowb(); /* make sure this write arrives before any others */
 
 	LEAVE("qla1280_isp_cmd");
 }