diff --git a/target/linux/cns3xxx/patches-4.4/130-Extend-PCIE_BUS_PEER2PEER-to-set-MRSS-128-to-fix-CNS3xxx-BM-DMA..patch b/target/linux/cns3xxx/patches-4.4/130-Extend-PCIE_BUS_PEER2PEER-to-set-MRSS-128-to-fix-CNS3xxx-BM-DMA..patch
new file mode 100644
index 0000000000..208c80a791
--- /dev/null
+++ b/target/linux/cns3xxx/patches-4.4/130-Extend-PCIE_BUS_PEER2PEER-to-set-MRSS-128-to-fix-CNS3xxx-BM-DMA..patch
@@ -0,0 +1,23 @@
+--- a/drivers/pci/probe.c
++++ b/drivers/pci/probe.c
+@@ -1924,7 +1924,8 @@ static void pcie_write_mrrs(struct pci_d
+ 	/* In the "safe" case, do not configure the MRRS.  There appear to be
+ 	 * issues with setting MRRS to 0 on a number of devices.
+ 	 */
+-	if (pcie_bus_config != PCIE_BUS_PERFORMANCE)
++	if (pcie_bus_config != PCIE_BUS_PERFORMANCE &&
++	    pcie_bus_config != PCIE_BUS_PEER2PEER)
+ 		return;
+ 
+ 	/* For Max performance, the MRRS must be set to the largest supported
+--- a/include/linux/pci.h
++++ b/include/linux/pci.h
+@@ -756,7 +756,7 @@ enum pcie_bus_config_types {
+ 	PCIE_BUS_DEFAULT,	/* ensure MPS matches upstream bridge */
+ 	PCIE_BUS_SAFE,		/* use largest MPS boot-time devices support */
+ 	PCIE_BUS_PERFORMANCE,	/* use MPS and MRRS for best performance */
+-	PCIE_BUS_PEER2PEER,	/* set MPS = 128 for all devices */
++	PCIE_BUS_PEER2PEER,	/* set MPS and MRSS to 128 for all devices */
+ };
+ 
+ extern enum pcie_bus_config_types pcie_bus_config;