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| author | Ben Hutchings <bhutchings@solarflare.com> | 2011-10-03 04:42:46 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-10-03 12:14:45 -0400 |
| commit | 09994d1b09bd9b0046a4708fa50d2106610a4058 (patch) | |
| tree | 1bd59c2e19b01e30e5666dd483df6d6254b82995 /net/core | |
| parent | 76231e0297db30f1f0e947a02b42495e7d535d56 (diff) | |
| download | linux-stable-09994d1b09bd9b0046a4708fa50d2106610a4058.tar.gz linux-stable-09994d1b09bd9b0046a4708fa50d2106610a4058.tar.bz2 linux-stable-09994d1b09bd9b0046a4708fa50d2106610a4058.zip | |
RPS: Ensure that an expired hardware filter can be re-added later
Amir Vadai wrote:
> When a stream is paused, and its rule is expired while it is paused,
> no new rule will be configured to the HW when traffic resume.
[...]
> - When stream was resumed, traffic was steered again by RSS, and
> because current-cpu was equal to desired-cpu, ndo_rx_flow_steer
> wasn't called and no rule was configured to the HW.
Fix this by setting the flow's current CPU only in the table for the
newly selected RX queue.
Reported-and-tested-by: Amir Vadai <amirv@dev.mellanox.co.il>
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 7f4486e127e9..70ecb86439ca 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2670,10 +2670,7 @@ static struct rps_dev_flow * set_rps_cpu(struct net_device *dev, struct sk_buff *skb, struct rps_dev_flow *rflow, u16 next_cpu) { - u16 tcpu; - - tcpu = rflow->cpu = next_cpu; - if (tcpu != RPS_NO_CPU) { + if (next_cpu != RPS_NO_CPU) { #ifdef CONFIG_RFS_ACCEL struct netdev_rx_queue *rxqueue; struct rps_dev_flow_table *flow_table; @@ -2701,16 +2698,16 @@ set_rps_cpu(struct net_device *dev, struct sk_buff *skb, goto out; old_rflow = rflow; rflow = &flow_table->flows[flow_id]; - rflow->cpu = next_cpu; rflow->filter = rc; if (old_rflow->filter == rflow->filter) old_rflow->filter = RPS_NO_FILTER; out: #endif rflow->last_qtail = - per_cpu(softnet_data, tcpu).input_queue_head; + per_cpu(softnet_data, next_cpu).input_queue_head; } + rflow->cpu = next_cpu; return rflow; } |