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IPoIB: Don't enable NAPI when it's already enabled 

If a P_Key is not present when an interface is created, ipoib_open()
will return after doing napi_enable().  ipoib_open() will be called
again from ipoib_pkey_poll() when the P_Key appears, after NAPI has
already been enabled, and try to enable it again. This triggers a
BUG_ON() in napi_enable().

Fix this by moving the call to napi_enable() to after the test for
P_Key presence.

Signed-off-by: Yossi Etigin <yosefe@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Yossi Etigin 2008-11-12 10:24:36 -08:00 committed by Roland Dreier
parent 332edc2f7f
commit fe25c56190
1 changed files with 2 additions and 1 deletions
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3
drivers/infiniband/ulp/ipoib/ipoib_main.c
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@ -106,12 +106,13 @@ int ipoib_open(struct net_device *dev)
ipoib_dbg(priv, "bringing up interface\n"); ipoib_dbg(priv, "bringing up interface\n");
napi_enable(&priv->napi);
set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
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)) { if (ipoib_ib_dev_open(dev)) {
napi_disable(&priv->napi); napi_disable(&priv->napi);
return -EINVAL; return -EINVAL;