| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.5 012/151] ipvlan: do not use cond_resched_rcu() in ipvlan_process_multicast() | Date | Tue, 17 Mar 2020 11:53:42 +0100 |
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From: Eric Dumazet <edumazet@google.com>
[ Upstream commit afe207d80a61e4d6e7cfa0611a4af46d0ba95628 ]
Commit e18b353f102e ("ipvlan: add cond_resched_rcu() while processing muticast backlog") added a cond_resched_rcu() in a loop using rcu protection to iterate over slaves.
This is breaking rcu rules, so lets instead use cond_resched() at a point we can reschedule
Fixes: e18b353f102e ("ipvlan: add cond_resched_rcu() while processing muticast backlog") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Mahesh Bandewar <maheshb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/net/ipvlan/ipvlan_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/ipvlan/ipvlan_core.c +++ b/drivers/net/ipvlan/ipvlan_core.c @@ -277,7 +277,6 @@ void ipvlan_process_multicast(struct wor } ipvlan_count_rx(ipvlan, len, ret == NET_RX_SUCCESS, true); local_bh_enable(); - cond_resched_rcu(); } rcu_read_unlock(); @@ -294,6 +293,7 @@ void ipvlan_process_multicast(struct wor } if (dev) dev_put(dev); + cond_resched(); } }
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