igb: Fix DCA errors and do not use context index for 82576

82576 was being incorrectly flagged as needing a context index.  It does not as
each ring has it's own table of 2 contexts.

Driver was registering after registering the driver instead of the other way around.

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>

diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index 5a27825..aebef8e 100644 (file)
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -300,11 +300,10 @@ struct igb_adapter {
 
 #define IGB_FLAG_HAS_MSI           (1 << 0)
 #define IGB_FLAG_MSI_ENABLE        (1 << 1)
-#define IGB_FLAG_HAS_DCA           (1 << 2)
-#define IGB_FLAG_DCA_ENABLED       (1 << 3)
-#define IGB_FLAG_IN_NETPOLL        (1 << 5)
-#define IGB_FLAG_QUAD_PORT_A       (1 << 6)
-#define IGB_FLAG_NEED_CTX_IDX      (1 << 7)
+#define IGB_FLAG_DCA_ENABLED       (1 << 2)
+#define IGB_FLAG_IN_NETPOLL        (1 << 3)
+#define IGB_FLAG_QUAD_PORT_A       (1 << 4)
+#define IGB_FLAG_NEED_CTX_IDX      (1 << 5)
 
 enum e1000_state_t {
        __IGB_TESTING,

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index b82b0fb..cc94412 100644 (file)
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -206,10 +206,11 @@ static int __init igb_init_module(void)
 
        global_quad_port_a = 0;
 
-       ret = pci_register_driver(&igb_driver);
 #ifdef CONFIG_IGB_DCA
        dca_register_notify(&dca_notifier);
 #endif
+
+       ret = pci_register_driver(&igb_driver);
        return ret;
 }
 
@@ -1156,11 +1157,10 @@ static int __devinit igb_probe(struct pci_dev *pdev,
 
        /* set flags */
        switch (hw->mac.type) {
-       case e1000_82576:
        case e1000_82575:
-               adapter->flags |= IGB_FLAG_HAS_DCA;
                adapter->flags |= IGB_FLAG_NEED_CTX_IDX;
                break;
+       case e1000_82576:
        default:
                break;
        }
@@ -1310,8 +1310,7 @@ static int __devinit igb_probe(struct pci_dev *pdev,
                goto err_register;
 
 #ifdef CONFIG_IGB_DCA
-       if ((adapter->flags & IGB_FLAG_HAS_DCA) &&
-           (dca_add_requester(&pdev->dev) == 0)) {
+       if (dca_add_requester(&pdev->dev) == 0) {
                adapter->flags |= IGB_FLAG_DCA_ENABLED;
                dev_info(&pdev->dev, "DCA enabled\n");
                /* Always use CB2 mode, difference is masked
@@ -3473,19 +3472,16 @@ static int __igb_notify_dca(struct device *dev, void *data)
        struct e1000_hw *hw = &adapter->hw;
        unsigned long event = *(unsigned long *)data;
 
-       if (!(adapter->flags & IGB_FLAG_HAS_DCA))
-               goto out;
-
        switch (event) {
        case DCA_PROVIDER_ADD:
                /* if already enabled, don't do it again */
                if (adapter->flags & IGB_FLAG_DCA_ENABLED)
                        break;
-               adapter->flags |= IGB_FLAG_DCA_ENABLED;
                /* Always use CB2 mode, difference is masked
                 * in the CB driver. */
                wr32(E1000_DCA_CTRL, 2);
                if (dca_add_requester(dev) == 0) {
+                       adapter->flags |= IGB_FLAG_DCA_ENABLED;
                        dev_info(&adapter->pdev->dev, "DCA enabled\n");
                        igb_setup_dca(adapter);
                        break;
@@ -3502,7 +3498,7 @@ static int __igb_notify_dca(struct device *dev, void *data)
                }
                break;
        }
-out:
+
        return 0;
 }