netxen: fix interrupt for NX2031

Signed-off-by: NAmit Kumar Salecha <amit.salecha@qlogic.com>

For NX2031, msix is supported from fw version > 3.4.336.
This fw version check should take flash fw in consider instead of
running fw or fw from file.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/netxen/netxen_nic_main.c

@@ -772,7 +772,13 @@ netxen_check_options(struct netxen_adapter *adapter)
 	if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
 		adapter->msix_supported = !!use_msi_x;
 		adapter->rss_supported = !!use_msi_x;
-	} else if (adapter->fw_version >= NETXEN_VERSION_CODE(3, 4, 336)) {
+	} else {
+		u32 flashed_ver = 0;
+		netxen_rom_fast_read(adapter,
+				NX_FW_VERSION_OFFSET, (int *)&flashed_ver);
+		flashed_ver = NETXEN_DECODE_VERSION(flashed_ver);
+
+		if (flashed_ver >= NETXEN_VERSION_CODE(3, 4, 336)) {
 			switch (adapter->ahw.board_type) {
 			case NETXEN_BRDTYPE_P2_SB31_10G:
 			case NETXEN_BRDTYPE_P2_SB31_10G_CX4:
@@ -783,6 +789,7 @@ netxen_check_options(struct netxen_adapter *adapter)
 				break;
 			}
 		}
+	}
 
 	adapter->num_txd = MAX_CMD_DESCRIPTORS;