be2net: fix to avoid sending get_stats request if one is already being processed.

GET_STATS request uses the same memory region as the response.
If a new request for get stats is fired before the response for
the previous get_stats request is received, the response will
corrupt the new request, causing the f/w to misbehave.

Signed-off-by: Somnath K <[e-mail]>
Signed-off-by: Ajit Khaparde <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/benet/be.h

···
 	u32 rx_fc;		/* Rx flow control */
 	u32 tx_fc;		/* Tx flow control */
 	bool ue_detected;
+	bool stats_ioctl_sent;
 	int link_speed;
 	u8 port_type;
 	u8 transceiver;

drivers/net/benet/be_cmds.c

···
 			be_dws_le_to_cpu(&resp->hw_stats,
 						sizeof(resp->hw_stats));
 			netdev_stats_update(adapter);
+			adapter->stats_ioctl_sent = false;
 		}
 	} else if ((compl_status != MCC_STATUS_NOT_SUPPORTED) &&
 		   (compl->tag0 != OPCODE_COMMON_NTWK_MAC_QUERY)) {
···
 	sge->len = cpu_to_le32(nonemb_cmd->size);
 
 	be_mcc_notify(adapter);
+	adapter->stats_ioctl_sent = true;
 
 err:
 	spin_unlock_bh(&adapter->mcc_lock);

drivers/net/benet/be_main.c

···
 	struct be_adapter *adapter =
 		container_of(work, struct be_adapter, work.work);
 
-	be_cmd_get_stats(adapter, &adapter->stats.cmd);
+	if (!adapter->stats_ioctl_sent)
+		be_cmd_get_stats(adapter, &adapter->stats.cmd);
 
 	/* Set EQ delay */
 	be_rx_eqd_update(adapter);