net: adjust napi_consume_skb to handle non-NAPI callers
authorJesper Dangaard Brouer <brouer@redhat.com>
Fri, 11 Mar 2016 08:43:58 +0000 (09:43 +0100)
committerDavid S. Miller <davem@davemloft.net>
Mon, 14 Mar 2016 02:35:35 +0000 (22:35 -0400)
commit885eb0a516e4d686849b91c5a1ba25c70b7a6540
treed6c23320fc70f5b5ab7354574a26447e5065d5e5
parentc45569755e828a8458d125bb93feb1d90ac9be6f
net: adjust napi_consume_skb to handle non-NAPI callers

Some drivers reuse/share code paths that free SKBs between NAPI
and non-NAPI calls. Adjust napi_consume_skb to handle this
use-case.

Before, calls from netpoll (w/ IRQs disabled) was handled and
indicated with a budget zero indication.  Use the same zero
indication to handle calls not originating from NAPI/softirq.
Simply handled by using dev_consume_skb_any().

This adds an extra branch+call for the netpoll case (checking
in_irq() + irqs_disabled()), but that is okay as this is a slowpath.

Suggested-by: Alexander Duyck <aduyck@mirantis.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/skbuff.c