8139cp: fix broken suspend/resume
- check that the device is up before it is enabled again;
- the descriptor ring indexes must be set to zero before
cp_init_hw() is issued. Add a nice comment to remember
that skb allocation failure is still not handled.
Fixes http://bugzilla.kernel.org/show_bug.cgi?id=5681
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
diff --git a/drivers/net/8139cp.c b/drivers/net/8139cp.c
index f822cd3..dd41049 100644
--- a/drivers/net/8139cp.c
+++ b/drivers/net/8139cp.c
@@ -1118,13 +1118,18 @@
return -ENOMEM;
}
+static void cp_init_rings_index (struct cp_private *cp)
+{
+ cp->rx_tail = 0;
+ cp->tx_head = cp->tx_tail = 0;
+}
+
static int cp_init_rings (struct cp_private *cp)
{
memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
cp->tx_ring[CP_TX_RING_SIZE - 1].opts1 = cpu_to_le32(RingEnd);
- cp->rx_tail = 0;
- cp->tx_head = cp->tx_tail = 0;
+ cp_init_rings_index(cp);
return cp_refill_rx (cp);
}
@@ -1886,30 +1891,30 @@
spin_unlock_irqrestore (&cp->lock, flags);
- if (cp->pdev && cp->wol_enabled) {
- pci_save_state (cp->pdev);
- cp_set_d3_state (cp);
- }
+ pci_save_state(pdev);
+ pci_enable_wake(pdev, pci_choose_state(pdev, state), cp->wol_enabled);
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
return 0;
}
static int cp_resume (struct pci_dev *pdev)
{
- struct net_device *dev;
- struct cp_private *cp;
+ struct net_device *dev = pci_get_drvdata (pdev);
+ struct cp_private *cp = netdev_priv(dev);
unsigned long flags;
- dev = pci_get_drvdata (pdev);
- cp = netdev_priv(dev);
+ if (!netif_running(dev))
+ return 0;
netif_device_attach (dev);
-
- if (cp->pdev && cp->wol_enabled) {
- pci_set_power_state (cp->pdev, PCI_D0);
- pci_restore_state (cp->pdev);
- }
-
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+ pci_enable_wake(pdev, PCI_D0, 0);
+
+ /* FIXME: sh*t may happen if the Rx ring buffer is depleted */
+ cp_init_rings_index (cp);
cp_init_hw (cp);
netif_start_queue (dev);
