igb: Fix tx/rx_ring_count parameters for igb on suspend/resume/ring resize

When suspending the device the ring structure is freed which causes it to
loose track of the count.  To resolve this we need to move the ring count
outside of the ring structure and store it in the adapter struct.

In addition to resolving the suspend/resume issue this patch also addresses
issues seen in the event of memory allocation errors causing uneven ring
sizes on multiple queues.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/igb/igb.h

@@ -294,6 +294,8 @@ struct igb_adapter {
 	unsigned int lro_flushed;
 	unsigned int lro_no_desc;
 #endif
+	unsigned int tx_ring_count;
+	unsigned int rx_ring_count;
 };
 
 #define IGB_FLAG_HAS_MSI           (1 << 0)
@@ -325,6 +327,8 @@ extern void igb_reset(struct igb_adapter *);
 extern int igb_set_spd_dplx(struct igb_adapter *, u16);
 extern int igb_setup_tx_resources(struct igb_adapter *, struct igb_ring *);
 extern int igb_setup_rx_resources(struct igb_adapter *, struct igb_ring *);
+extern void igb_free_tx_resources(struct igb_ring *);
+extern void igb_free_rx_resources(struct igb_ring *);
 extern void igb_update_stats(struct igb_adapter *);
 extern void igb_set_ethtool_ops(struct net_device *);