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IPoIB: Fix hang in napi_disable() if P_Key is never found

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After commit fe25c561 ("IPoIB: Don't enable NAPI when it's already
enabled"), if an interface is brought up but the corresponding P_Key
never appears, then ipoib_stop() will hang in napi_disable(), because
ipoib_open() returns before it does napi_enable().

Fix this by changing ipoib_open() to call napi_enable() even if the
P_Key isn't present.

Reported-by: Yossi Etigin <yosefe@Voltaire.COM>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier 2009-01-14 14:55:41 -08:00
parent e0b325d310
commit b8a1b1ce14
1 changed files with 15 additions and 12 deletions
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27
drivers/infiniband/ulp/ipoib/ipoib_main.c
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@ -106,23 +106,17 @@ int ipoib_open(struct net_device *dev)
ipoib_dbg(priv, "bringing up interface\n"); ipoib_dbg(priv, "bringing up interface\n");
set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); if (!test_and_set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
napi_enable(&priv->napi);
if (ipoib_pkey_dev_delay_open(dev)) if (ipoib_pkey_dev_delay_open(dev))
return 0; return 0;
napi_enable(&priv->napi); if (ipoib_ib_dev_open(dev))
goto err_disable;
if (ipoib_ib_dev_open(dev)) { if (ipoib_ib_dev_up(dev))
napi_disable(&priv->napi); goto err_stop;
return -EINVAL;
}
if (ipoib_ib_dev_up(dev)) {
ipoib_ib_dev_stop(dev, 1);
napi_disable(&priv->napi);
return -EINVAL;
}
if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
struct ipoib_dev_priv *cpriv; struct ipoib_dev_priv *cpriv;
@ -144,6 +138,15 @@ int ipoib_open(struct net_device *dev)
netif_start_queue(dev); netif_start_queue(dev);
return 0; return 0;
err_stop:
ipoib_ib_dev_stop(dev, 1);
err_disable:
napi_disable(&priv->napi);
clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
return -EINVAL;
} }
static int ipoib_stop(struct net_device *dev) static int ipoib_stop(struct net_device *dev)