net/sched: cls_flower: Set the filter Hardware device for all use-cases

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: 7091d8c ('net/sched: cls_flower: Add offload support using egress Hardware device')
Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Reported-by: Simon Horman <horms@verge.net.au>
Tested-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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 {