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netpoll: re-enable irq in poll_napi()

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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>
This commit is contained in:
Amerigo Wang 2012-08-10 01:24:50 +00:00 committed by David S. Miller
parent 689971b446
commit 6bdb7fe310
1 changed files with 9 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

10
net/core/netpoll.c
View file

@ -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();
}
}