tg3: Refactor tg3_open()

by introducing tg3_start() that handles all initialization steps from
IRQ allocation.  This function will be needed when adding support for
changing the number of rx and tx rings.

Reviewed-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 45 insertions, 33 deletions

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index ddf260cc2db7..9bd99ce46e5f 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -10339,38 +10339,11 @@ static void tg3_ints_fini(struct tg3 *tp)
         tg3_flag_clear(tp, ENABLE_TSS);
 }
 
-static int tg3_open(struct net_device *dev)
+static int tg3_start(struct tg3 *tp, bool reset_phy, bool test_irq)
 {
-        struct tg3 *tp = netdev_priv(dev);
+        struct net_device *dev = tp->dev;
         int i, err;
 
-        if (tp->fw_needed) {
-                err = tg3_request_firmware(tp);
-                if (tp->pci_chip_rev_id == CHIPREV_ID_5701_A0) {
-                        if (err)
-                                return err;
-                } else if (err) {
-                        netdev_warn(tp->dev, "TSO capability disabled\n");
-                        tg3_flag_clear(tp, TSO_CAPABLE);
-                } else if (!tg3_flag(tp, TSO_CAPABLE)) {
-                        netdev_notice(tp->dev, "TSO capability restored\n");
-                        tg3_flag_set(tp, TSO_CAPABLE);
-                }
-        }
-
-        netif_carrier_off(tp->dev);
-
-        err = tg3_power_up(tp);
-        if (err)
-                return err;
-
-        tg3_full_lock(tp, 0);
-
-        tg3_disable_ints(tp);
-        tg3_flag_clear(tp, INIT_COMPLETE);
-
-        tg3_full_unlock(tp);
-
         /*
          * Setup interrupts first so we know how
          * many NAPI resources to allocate
@@ -10404,7 +10377,7 @@ static int tg3_open(struct net_device *dev)
 
         tg3_full_lock(tp, 0);
 
-        err = tg3_init_hw(tp, 1);
+        err = tg3_init_hw(tp, reset_phy);
         if (err) {
                 tg3_halt(tp, RESET_KIND_SHUTDOWN, 1);
                 tg3_free_rings(tp);
@@ -10415,7 +10388,7 @@ static int tg3_open(struct net_device *dev)
         if (err)
                 goto err_out3;
 
-        if (tg3_flag(tp, USING_MSI)) {
+        if (test_irq && tg3_flag(tp, USING_MSI)) {
                 err = tg3_test_msi(tp);
 
                 if (err) {
@@ -10471,8 +10444,47 @@ err_out2:
 
 err_out1:
         tg3_ints_fini(tp);
-        tg3_frob_aux_power(tp, false);
-        pci_set_power_state(tp->pdev, PCI_D3hot);
+
+        return err;
+}
+
+static int tg3_open(struct net_device *dev)
+{
+        struct tg3 *tp = netdev_priv(dev);
+        int err;
+
+        if (tp->fw_needed) {
+                err = tg3_request_firmware(tp);
+                if (tp->pci_chip_rev_id == CHIPREV_ID_5701_A0) {
+                        if (err)
+                                return err;
+                } else if (err) {
+                        netdev_warn(tp->dev, "TSO capability disabled\n");
+                        tg3_flag_clear(tp, TSO_CAPABLE);
+                } else if (!tg3_flag(tp, TSO_CAPABLE)) {
+                        netdev_notice(tp->dev, "TSO capability restored\n");
+                        tg3_flag_set(tp, TSO_CAPABLE);
+                }
+        }
+
+        netif_carrier_off(tp->dev);
+
+        err = tg3_power_up(tp);
+        if (err)
+                return err;
+
+        tg3_full_lock(tp, 0);
+
+        tg3_disable_ints(tp);
+        tg3_flag_clear(tp, INIT_COMPLETE);
+
+        tg3_full_unlock(tp);
+
+        err = tg3_start(tp, true, true);
+        if (err) {
+                tg3_frob_aux_power(tp, false);
+                pci_set_power_state(tp->pdev, PCI_D3hot);
+        }
         return err;
 }