According to the HyperTransport spec, 'En' indicate if the MSI Mapping is active. So it should be set when enable the MSI.

The patch base on kernel 2.6.24-rc3

Signed-off-by: Andy Currid <acurrid@nvidia.com>
Signed-off-by: Peer Chen <pchen@nvidia.com>

---
--- linux-2.6.24-rc3/include/linux/pci_ids.h.orig	2007-11-23 17:50:30.000000000 -0500
+++ linux-2.6.24-rc3/include/linux/pci_ids.h	2007-11-23 17:50:42.000000000 -0500
@@ -1153,7 +1153,16 @@
 #define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_IDE	0x0265
 #define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA	0x0266
 #define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2	0x0267
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_C51_MEMC0   0x02F0
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_C51_MEMC1   0x02F1
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_C51_MEMC2   0x02F2
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_C51_MEMC3   0x02F3
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_C51_MEMC4   0x02F4
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_C51_MEMC5   0x02F5
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_C51_MEMC6   0x02F6
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_C51_MEMC7   0x02F7
 #define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SMBUS	0x0368
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_MEMC	0x0369
 #define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_IDE	0x036E
 #define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA	0x037E
 #define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2	0x037F
-

-
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