From 52c234d791774d642480a21d1c5328cfe9607696 Mon Sep 17 00:00:00 2001
From: Mark Meserve <mark.meserve@ni.com>
Date: Mon, 13 Mar 2017 17:17:48 -0500
Subject: max2871: fix for not writing register 0 when required

---
 host/lib/usrp/common/max287x.hpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/host/lib/usrp/common/max287x.hpp b/host/lib/usrp/common/max287x.hpp
index 2e87dc6ff..839ed77bc 100644
--- a/host/lib/usrp/common/max287x.hpp
+++ b/host/lib/usrp/common/max287x.hpp
@@ -900,6 +900,12 @@ void max287x<max287x_regs_t>::commit()
     } else {
         try {
             changed_regs = _regs.template get_changed_addrs<uint32_t> ();
+            // register 0 must be written to apply double buffered fields
+            if (changed_regs.size() > 0)
+            {
+                changed_regs.insert(0);
+            }
+
             for (int addr = 5; addr >= 0; addr--)
             {
                 if (changed_regs.find(uint32_t(addr)) != changed_regs.end())
-- 
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