[PATCH net-next] net/sched: cls_flower: Set the filter Hardware device for all use-cases

[Hadar Hen Zion]

Check if the returned device from tcf_exts_get_dev function supports tc
offload and in case the rule can't be offloaded, set the filter hw_dev
parameter to the original device given by the user.

The filter hw_device parameter should always be set by fl_hw_replace_filter
function, since this pointer is used by dump stats and destroy
filter for each flower rule (offloaded or not).

Fixes: 7091d8c7055d ('net/sched: cls_flower: Add offload support using egress 
Hardware device')
Signed-off-by: Hadar Hen Zion <had...@mellanox.com>
Reported-by: Simon Horman <ho...@verge.net.au>
---
 net/sched/cls_flower.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index c5cea78..29a9e6d 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -236,8 +236,11 @@ static int fl_hw_replace_filter(struct tcf_proto *tp,
        int err;
 
        if (!tc_can_offload(dev, tp)) {
-               if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev))
+               if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) ||
+                   (f->hw_dev && !tc_can_offload(f->hw_dev, tp))) {
+                       f->hw_dev = dev;
                        return tc_skip_sw(f->flags) ? -EINVAL : 0;
+               }
                dev = f->hw_dev;
                tc->egress_dev = true;
        } else {
-- 
1.8.3.1