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>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 0d33378edc63..ceb0a0458796 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -76,8 +76,6 @@ static int igb_setup_all_tx_resources(struct igb_adapter *);
 static int igb_setup_all_rx_resources(struct igb_adapter *);
 static void igb_free_all_tx_resources(struct igb_adapter *);
 static void igb_free_all_rx_resources(struct igb_adapter *);
-static void igb_free_tx_resources(struct igb_ring *);
-static void igb_free_rx_resources(struct igb_ring *);
 void igb_update_stats(struct igb_adapter *);
 static int igb_probe(struct pci_dev *, const struct pci_device_id *);
 static void __devexit igb_remove(struct pci_dev *pdev);
@@ -259,11 +257,13 @@ static int igb_alloc_queues(struct igb_adapter *adapter)
 
         for (i = 0; i < adapter->num_tx_queues; i++) {
                 struct igb_ring *ring = &(adapter->tx_ring[i]);
+                ring->count = adapter->tx_ring_count;
                 ring->adapter = adapter;
                 ring->queue_index = i;
         }
         for (i = 0; i < adapter->num_rx_queues; i++) {
                 struct igb_ring *ring = &(adapter->rx_ring[i]);
+                ring->count = adapter->rx_ring_count;
                 ring->adapter = adapter;
                 ring->queue_index = i;
                 ring->itr_register = E1000_ITR;
@@ -1400,6 +1400,8 @@ static int __devinit igb_sw_init(struct igb_adapter *adapter)
 
         pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word);
 
+        adapter->tx_ring_count = IGB_DEFAULT_TXD;
+        adapter->rx_ring_count = IGB_DEFAULT_RXD;
         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
         adapter->rx_ps_hdr_size = 0; /* disable packet split */
         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
@@ -1988,7 +1990,7 @@ static void igb_configure_rx(struct igb_adapter *adapter)
  *
  * Free all transmit software resources
  **/
-static void igb_free_tx_resources(struct igb_ring *tx_ring)
+void igb_free_tx_resources(struct igb_ring *tx_ring)
 {
         struct pci_dev *pdev = tx_ring->adapter->pdev;
 
@@ -2088,7 +2090,7 @@ static void igb_clean_all_tx_rings(struct igb_adapter *adapter)
  *
  * Free all receive software resources
  **/
-static void igb_free_rx_resources(struct igb_ring *rx_ring)
+void igb_free_rx_resources(struct igb_ring *rx_ring)
 {
         struct pci_dev *pdev = rx_ring->adapter->pdev;