netpoll: shut up a kernel warning on refcount
authorWANG Cong <xiyou.wangcong@gmail.com>
Wed, 12 Jul 2017 22:56:41 +0000 (15:56 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 14 Jul 2017 15:16:59 +0000 (08:16 -0700)
commit230cd1279d0019d52f9529c7d91c96d095cae755
tree9b68a605129c05297400fbb03befc95532454fc8
parent2b02c20ce0c28974b44e69a2e2f5ddc6a470ad6f
netpoll: shut up a kernel warning on refcount

When we convert atomic_t to refcount_t, a new kernel warning
on "increment on 0" is introduced in the netpoll code,
zap_completion_queue(). In fact for this special case, we know
the refcount is 0 and we just have to set it to 1 to satisfy
the following dev_kfree_skb_any(), so we can just use
refcount_set(..., 1) instead.

Fixes: 633547973ffc ("net: convert sk_buff.users from atomic_t to refcount_t")
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Cc: Reshetova, Elena <elena.reshetova@intel.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/netpoll.c