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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>
This commit is contained in:
Francois Romieu 2006-02-27 23:15:06 +01:00
parent b3c3e7d7d9
commit 576cfa934e
1 changed files with 21 additions and 16 deletions
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37
drivers/net/8139cp.c
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@ -1118,13 +1118,18 @@ static int cp_refill_rx (struct cp_private *cp)
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 @@ static int cp_suspend (struct pci_dev *pdev, pm_message_t state)
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);