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netpoll: Warn if more packets are processed than are budgeted 

There is already a warning for this case in the normal netpoll path,
but put a copy here in case how netpoll calls the poll functions
causes a differenet result.

netpoll will shortly call the napi poll routine with a budget 0 to
avoid any rx packets being processed.  As nothing does that today
we may encounter drivers that have problems so a netpoll specific
warning seems desirable.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2014-03-14 20:47:15 -07:00 committed by David S. Miller
parent eb8143b469
commit e97dc3fcf9
1 changed files with 1 additions and 0 deletions
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1
net/core/netpoll.c
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@ -158,6 +158,7 @@ static int poll_one_napi(struct napi_struct *napi, int budget)
set_bit(NAPI_STATE_NPSVC, &napi->state);
work = napi->poll(napi, budget);
WARN_ONCE(work > budget, "%pF exceeded budget in poll\n", napi->poll);
trace_napi_poll(napi);
clear_bit(NAPI_STATE_NPSVC, &napi->state);