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authorAmerigo Wang <amwang@redhat.com>2012-08-10 01:24:50 +0000
committerDavid S. Miller <davem@davemloft.net>2012-08-14 14:33:33 -0700
commit6bdb7fe31046ac50b47e83c35cd6c6b6160a475d (patch)
treec74da2bcfb27867bfc2fed58d3b5a9c84d445ef8 /net
parent689971b44613883ee74ae9c1b31a864aaa3a8e17 (diff)
netpoll: re-enable irq in poll_napi()
napi->poll() needs IRQ enabled, so we have to re-enable IRQ before calling it. Cc: David Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/netpoll.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index e4ba3e70c174..346b1eb83a1f 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -168,16 +168,24 @@ static void poll_napi(struct net_device *dev)
struct napi_struct *napi;
int budget = 16;
+ WARN_ON_ONCE(!irqs_disabled());
+
list_for_each_entry(napi, &dev->napi_list, dev_list) {
+ local_irq_enable();
if (napi->poll_owner != smp_processor_id() &&
spin_trylock(&napi->poll_lock)) {
+ rcu_read_lock_bh();
budget = poll_one_napi(rcu_dereference_bh(dev->npinfo),
napi, budget);
+ rcu_read_unlock_bh();
spin_unlock(&napi->poll_lock);
- if (!budget)
+ if (!budget) {
+ local_irq_disable();
break;
+ }
}
+ local_irq_disable();
}
}

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