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Subject[PATCH AUTOSEL 4.19 28/37] ipvlan: do not use cond_resched_rcu() in ipvlan_process_multicast()
Date
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: Sasha Levin <sashal@kernel.org>
---
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 6fe24721e4856..40ac60904c8dd 100644
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -282,7 +282,6 @@ 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();

@@ -299,6 +298,7 @@ void ipvlan_process_multicast(struct work_struct *work)
}
if (dev)
dev_put(dev);
+ cond_resched();
}
}

--
2.20.1
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