kernel: bump 4.19 to 4.19.51

Refreshed all patches.

Altered patches:
- 370-netfilter-nf_flow_table-fix-offloaded-connection-tim.patch
- 220-optimize_inlining.patch
- 640-netfilter-nf_flow_table-add-hardware-offload-support.patch

This patch also restores the initial implementation
of the ath79 perfcount IRQ issue. (78ee6b1a40b5)
It was wrongfully backported upstream initially and got reverted now.

Compile-tested on: cns3xxx, imx6
Runtime-tested on: cns3xxx, imx6

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

4 files changed, 15 insertions, 11 deletions

diff --git a/target/linux/generic/backport-4.19/343-netfilter-nft_flow_offload-handle-netdevice-events-f.patch b/target/linux/generic/backport-4.19/343-netfilter-nft_flow_offload-handle-netdevice-events-f.patch
index f8ccfcc95d..17133d552f 100644
--- a/target/linux/generic/backport-4.19/343-netfilter-nft_flow_offload-handle-netdevice-events-f.patch
+++ b/target/linux/generic/backport-4.19/343-netfilter-nft_flow_offload-handle-netdevice-events-f.patch
@@ -10,7 +10,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 
 --- a/net/netfilter/nf_flow_table_core.c
 +++ b/net/netfilter/nf_flow_table_core.c
-@@ -520,5 +520,35 @@ void nf_flow_table_free(struct nf_flowta
+@@ -531,5 +531,35 @@ void nf_flow_table_free(struct nf_flowta
  }
  EXPORT_SYMBOL_GPL(nf_flow_table_free);
  
@@ -48,7 +48,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
  MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
 --- a/net/netfilter/nft_flow_offload.c
 +++ b/net/netfilter/nft_flow_offload.c
-@@ -196,47 +196,14 @@ static struct nft_expr_type nft_flow_off
+@@ -197,47 +197,14 @@ static struct nft_expr_type nft_flow_off
  	.owner		= THIS_MODULE,
  };
  
diff --git a/target/linux/generic/backport-4.19/366-netfilter-nf_flow_table-clean-up-and-fix-dst-handlin.patch b/target/linux/generic/backport-4.19/366-netfilter-nf_flow_table-clean-up-and-fix-dst-handlin.patch
index ac7a73b60e..23156b521c 100644
--- a/target/linux/generic/backport-4.19/366-netfilter-nf_flow_table-clean-up-and-fix-dst-handlin.patch
+++ b/target/linux/generic/backport-4.19/366-netfilter-nf_flow_table-clean-up-and-fix-dst-handlin.patch
@@ -18,7 +18,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 
 --- a/net/netfilter/nf_flow_table_ip.c
 +++ b/net/netfilter/nf_flow_table_ip.c
-@@ -241,7 +241,7 @@ nf_flow_offload_ip_hook(void *priv, stru
+@@ -244,7 +244,7 @@ nf_flow_offload_ip_hook(void *priv, stru
  
  	dir = tuplehash->tuple.dir;
  	flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]);
@@ -27,7 +27,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
  	if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu)) &&
  	    (ip_hdr(skb)->frag_off & htons(IP_DF)) != 0)
-@@ -459,7 +459,7 @@ nf_flow_offload_ipv6_hook(void *priv, st
+@@ -465,7 +465,7 @@ nf_flow_offload_ipv6_hook(void *priv, st
  
  	dir = tuplehash->tuple.dir;
  	flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]);
diff --git a/target/linux/generic/backport-4.19/370-netfilter-nf_flow_table-fix-offloaded-connection-tim.patch b/target/linux/generic/backport-4.19/370-netfilter-nf_flow_table-fix-offloaded-connection-tim.patch
index cc8e00353d..69f0a5fd24 100644
--- a/target/linux/generic/backport-4.19/370-netfilter-nf_flow_table-fix-offloaded-connection-tim.patch
+++ b/target/linux/generic/backport-4.19/370-netfilter-nf_flow_table-fix-offloaded-connection-tim.patch
@@ -54,11 +54,11 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  				nf_ct_gc_expired(tmp);
 --- a/net/netfilter/nf_flow_table_core.c
 +++ b/net/netfilter/nf_flow_table_core.c
-@@ -183,8 +183,27 @@ static const struct rhashtable_params nf
+@@ -183,6 +183,24 @@ static const struct rhashtable_params nf
  	.automatic_shrinking	= true,
  };
  
-+#define	DAY	(86400 * HZ)
++#define        DAY     (86400 * HZ)
 +
 +/* Set an arbitrary timeout large enough not to ever expire, this save
 + * us a check for the IPS_OFFLOAD_BIT from the packet path via
@@ -78,11 +78,15 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 +
  int flow_offload_add(struct nf_flowtable *flow_table, struct flow_offload *flow)
  {
+ 	int err;
+@@ -203,6 +221,7 @@ int flow_offload_add(struct nf_flowtable
+ 		return err;
+ 	}
 +	nf_ct_offload_timeout(flow);
  	flow->timeout = (u32)jiffies;
- 
- 	rhashtable_insert_fast(&flow_table->rhashtable,
-@@ -305,6 +324,8 @@ static int nf_flow_offload_gc_step(struc
+ 	return 0;
+ }
+@@ -316,6 +335,8 @@ static int nf_flow_offload_gc_step(struc
  	rhashtable_walk_start(&hti);
  
  	while ((tuplehash = rhashtable_walk_next(&hti))) {
@@ -91,7 +95,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  		if (IS_ERR(tuplehash)) {
  			err = PTR_ERR(tuplehash);
  			if (err != -EAGAIN)
-@@ -317,9 +338,13 @@ static int nf_flow_offload_gc_step(struc
+@@ -328,9 +349,13 @@ static int nf_flow_offload_gc_step(struc
  
  		flow = container_of(tuplehash, struct flow_offload, tuplehash[0]);
  
diff --git a/target/linux/generic/backport-4.19/371-netfilter-nf_flow_table-fix-up-ct-state-of-flows-aft.patch b/target/linux/generic/backport-4.19/371-netfilter-nf_flow_table-fix-up-ct-state-of-flows-aft.patch
index 5ee55b8f08..9fb9ed9ad3 100644
--- a/target/linux/generic/backport-4.19/371-netfilter-nf_flow_table-fix-up-ct-state-of-flows-aft.patch
+++ b/target/linux/generic/backport-4.19/371-netfilter-nf_flow_table-fix-up-ct-state-of-flows-aft.patch
@@ -12,7 +12,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 
 --- a/net/netfilter/nf_flow_table_core.c
 +++ b/net/netfilter/nf_flow_table_core.c
-@@ -231,6 +231,9 @@ static void flow_offload_del(struct nf_f
+@@ -242,6 +242,9 @@ static void flow_offload_del(struct nf_f
  	e = container_of(flow, struct flow_offload_entry, flow);
  	clear_bit(IPS_OFFLOAD_BIT, &e->ct->status);