Subject: [PATCH 08/66] ipvlan: do not use cond_resched_rcu() in ipvlan_process_multicast()

From: Eric Dumazet <[email-masked]>
Date: Mon, 9 Mar 2020 18:22:58 -0700

[ 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 <[email-masked]>
Cc: Mahesh Bandewar <[email-masked]>
Signed-off-by: David S. Miller <[email-masked]>
---
 drivers/net/ipvlan/ipvlan_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c
index 514e497d9ff5..57617ff5565f 100644
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -277,7 +277,6 @@ void ipvlan_process_multicast(struct work_struct *work)
 			}
 			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 work_struct *work)
 		}
 		if (dev)
 			dev_put(dev);
+		cond_resched();
 	}
 }
 
-- 
2.20.1