diff --git a/[refs] b/[refs]
index 6c904d4ca02f..60521de9bf4a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a9097a9666fd7b08fd2a152b2a0b6c8d48639bb2
+refs/heads/master: 51e3137b9b6113c7e12cf0a0dc82238854a86712
diff --git a/trunk/Documentation/networking/stmmac.txt b/trunk/Documentation/networking/stmmac.txt
index 40ec92ce4c84..8d67980fabe8 100644
--- a/trunk/Documentation/networking/stmmac.txt
+++ b/trunk/Documentation/networking/stmmac.txt
@@ -76,7 +76,16 @@ core.
 
 4.5) DMA descriptors
 Driver handles both normal and enhanced descriptors. The latter has been only
-tested on DWC Ether MAC 10/100/1000 Universal version 3.41a.
+tested on DWC Ether MAC 10/100/1000 Universal version 3.41a and later.
+
+STMMAC supports DMA descriptor to operate both in dual buffer (RING)
+and linked-list(CHAINED) mode. In RING each descriptor points to two
+data buffer pointers whereas in CHAINED mode they point to only one data
+buffer pointer. RING mode is the default.
+
+In CHAINED mode each descriptor will have pointer to next descriptor in
+the list, hence creating the explicit chaining in the descriptor itself,
+whereas such explicit chaining is not possible in RING mode.
 
 4.6) Ethtool support
 Ethtool is supported. Driver statistics and internal errors can be taken using:
diff --git a/trunk/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/trunk/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index 50e95d87857a..49a4af3ce3a8 100644
--- a/trunk/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/trunk/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -20,7 +20,7 @@
   Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
 *******************************************************************************/
 
-#define DRV_MODULE_VERSION	"Aug_2011"
+#define DRV_MODULE_VERSION	"Oct_2011"
 #include <linux/stmmac.h>
 
 #include "common.h"