This is a note to let you know that I've just added the patch titled
net_sch: red: Fix the new offload indication
to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: net_sch-red-fix-the-new-offload-indication.patch and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Mon Apr 9 10:16:32 CEST 2018
From: Nogah Frankel nogahf@mellanox.com Date: Mon, 25 Dec 2017 10:51:41 +0200 Subject: net_sch: red: Fix the new offload indication
From: Nogah Frankel nogahf@mellanox.com
[ Upstream commit 8234af2db3614d78b49e77ef46ea8cfab6586568 ]
Update the offload flag, TCQ_F_OFFLOADED, in each dump call (and ignore the offloading function return value in relation to this flag). This is done because a qdisc is being initialized, and therefore offloaded before being grafted. Since the ability of the driver to offload the qdisc depends on its location, a qdisc can be offloaded and un-offloaded by graft calls, that doesn't effect the qdisc itself.
Fixes: 428a68af3a7c ("net: sched: Move to new offload indication in RED" Signed-off-by: Nogah Frankel nogahf@mellanox.com Reviewed-by: Yuval Mintz yuvalm@mellanox.com Acked-by: Jiri Pirko jiri@mellanox.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/sched/sch_red.c | 26 ++++++++++++++------------ 1 file changed, 14 insertions(+), 12 deletions(-)
--- a/net/sched/sch_red.c +++ b/net/sched/sch_red.c @@ -157,7 +157,6 @@ static int red_offload(struct Qdisc *sch .handle = sch->handle, .parent = sch->parent, }; - int err;
if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc) return -EOPNOTSUPP; @@ -172,14 +171,7 @@ static int red_offload(struct Qdisc *sch opt.command = TC_RED_DESTROY; }
- err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_RED, &opt); - - if (!err && enable) - sch->flags |= TCQ_F_OFFLOADED; - else - sch->flags &= ~TCQ_F_OFFLOADED; - - return err; + return dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_RED, &opt); }
static void red_destroy(struct Qdisc *sch) @@ -294,12 +286,22 @@ static int red_dump_offload_stats(struct .stats.qstats = &sch->qstats, }, }; + int err; + + sch->flags &= ~TCQ_F_OFFLOADED;
- if (!(sch->flags & TCQ_F_OFFLOADED)) + if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc) + return 0; + + err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_RED, + &hw_stats); + if (err == -EOPNOTSUPP) return 0;
- return dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_RED, - &hw_stats); + if (!err) + sch->flags |= TCQ_F_OFFLOADED; + + return err; }
static int red_dump(struct Qdisc *sch, struct sk_buff *skb)
Patches currently in stable-queue which might be from nogahf@mellanox.com are
queue-4.15/net_sch-red-fix-the-new-offload-indication.patch