kernel: bump 5.4 to 5.4.114

Manually rebased*
  generic/backport-5.4/700-v5.5-net-core-allow-fast-GRO-for-skbs-with-Ethernet-heade.patch

Added new backport*
  generic/backport-5.4/050-gro-fix-napi_gro_frags-Fast-GRO-breakage-due-to-IP-a.patch

All others updated automatically.

The new backport was included based on this[1] upstream commit that will be
mainlined soon.  This change is needed because Eric Dumazet's check for
NET_IP_ALIGN (landed in 5.4.114) causes huge slowdowns on drivers which use
napi_gro_frags().

Build system: x86_64
Build-tested: ipq806x/R7800
Run-tested: ipq806x/R7800

No dmesg regressions, everything functional

*Credit to Alexander Lobakin
1. https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7ad18ff6449cbd6beb26b53128ddf56d2685aa93

Signed-off-by: John Audia <graysky@archlinux.us>

4 files changed, 81 insertions, 6 deletions

diff --git a/target/linux/generic/backport-5.4/050-gro-fix-napi_gro_frags-Fast-GRO-breakage-due-to-IP-a.patch b/target/linux/generic/backport-5.4/050-gro-fix-napi_gro_frags-Fast-GRO-breakage-due-to-IP-a.patch
new file mode 100644
index 0000000000..17e9e34589
--- /dev/null
+++ b/target/linux/generic/backport-5.4/050-gro-fix-napi_gro_frags-Fast-GRO-breakage-due-to-IP-a.patch
@@ -0,0 +1,75 @@
+From 3007b05df4301aad179acc6ca1c3645785576df6 Mon Sep 17 00:00:00 2001
+From: Alexander Lobakin <alobakin@pm.me>
+Date: Mon, 19 Apr 2021 12:53:06 +0000
+Subject: gro: fix napi_gro_frags() Fast GRO breakage due to IP
+ alignment check
+
+Commit 7ad18ff6449cbd6beb26b53128ddf56d2685aa93 upstream.
+
+Commit 38ec4944b593 ("gro: ensure frag0 meets IP header alignment")
+did the right thing, but missed the fact that napi_gro_frags() logics
+calls for skb_gro_reset_offset() *before* pulling Ethernet header
+to the skb linear space.
+That said, the introduced check for frag0 address being aligned to 4
+always fails for it as Ethernet header is obviously 14 bytes long,
+and in case with NET_IP_ALIGN its start is not aligned to 4.
+
+Fix this by adding @nhoff argument to skb_gro_reset_offset() which
+tells if an IP header is placed right at the start of frag0 or not.
+This restores Fast GRO for napi_gro_frags() that became very slow
+after the mentioned commit, and preserves the introduced check to
+avoid silent unaligned accesses.
+
+From v1 [0]:
+ - inline tiny skb_gro_reset_offset() to let the code be optimized
+   more efficively (esp. for the !NET_IP_ALIGN case) (Eric);
+ - pull in Reviewed-by from Eric.
+
+[0] https://lore.kernel.org/netdev/20210418114200.5839-1-alobakin@pm.me
+
+Fixes: 38ec4944b593 ("gro: ensure frag0 meets IP header alignment")
+Reviewed-by: Eric Dumazet <edumazet@google.com>
+Signed-off-by: Alexander Lobakin <alobakin@pm.me>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ net/core/dev.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -5395,7 +5395,7 @@ static struct list_head *gro_list_prepar
+ 	return head;
+ }
+ 
+-static void skb_gro_reset_offset(struct sk_buff *skb)
++static inline void skb_gro_reset_offset(struct sk_buff *skb, u32 nhoff)
+ {
+ 	const struct skb_shared_info *pinfo = skb_shinfo(skb);
+ 	const skb_frag_t *frag0 = &pinfo->frags[0];
+@@ -5407,7 +5407,7 @@ static void skb_gro_reset_offset(struct
+ 	if (skb_mac_header(skb) == skb_tail_pointer(skb) &&
+ 	    pinfo->nr_frags &&
+ 	    !PageHighMem(skb_frag_page(frag0)) &&
+-	    (!NET_IP_ALIGN || !(skb_frag_off(frag0) & 3))) {
++	    (!NET_IP_ALIGN || !((skb_frag_off(frag0) + nhoff) & 3))) {
+ 		NAPI_GRO_CB(skb)->frag0 = skb_frag_address(frag0);
+ 		NAPI_GRO_CB(skb)->frag0_len = min_t(unsigned int,
+ 						    skb_frag_size(frag0),
+@@ -5640,7 +5640,7 @@ gro_result_t napi_gro_receive(struct nap
+ 	skb_mark_napi_id(skb, napi);
+ 	trace_napi_gro_receive_entry(skb);
+ 
+-	skb_gro_reset_offset(skb);
++	skb_gro_reset_offset(skb, 0);
+ 
+ 	ret = napi_skb_finish(napi, skb, dev_gro_receive(napi, skb));
+ 	trace_napi_gro_receive_exit(ret);
+@@ -5733,7 +5733,7 @@ static struct sk_buff *napi_frags_skb(st
+ 	napi->skb = NULL;
+ 
+ 	skb_reset_mac_header(skb);
+-	skb_gro_reset_offset(skb);
++	skb_gro_reset_offset(skb, hlen);
+ 
+ 	if (unlikely(skb_gro_header_hard(skb, hlen))) {
+ 		eth = skb_gro_header_slow(skb, hlen, 0);
diff --git a/target/linux/generic/backport-5.4/700-v5.5-net-core-allow-fast-GRO-for-skbs-with-Ethernet-heade.patch b/target/linux/generic/backport-5.4/700-v5.5-net-core-allow-fast-GRO-for-skbs-with-Ethernet-heade.patch
index a79c860187..a942a53809 100644
--- a/target/linux/generic/backport-5.4/700-v5.5-net-core-allow-fast-GRO-for-skbs-with-Ethernet-heade.patch
+++ b/target/linux/generic/backport-5.4/700-v5.5-net-core-allow-fast-GRO-for-skbs-with-Ethernet-heade.patch
@@ -66,13 +66,13 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
 
 --- a/net/core/dev.c
 +++ b/net/core/dev.c
-@@ -5404,8 +5404,7 @@ static void skb_gro_reset_offset(struct
+@@ -5404,8 +5404,7 @@ static inline void skb_gro_reset_offset(
  	NAPI_GRO_CB(skb)->frag0 = NULL;
  	NAPI_GRO_CB(skb)->frag0_len = 0;
  
 -	if (skb_mac_header(skb) == skb_tail_pointer(skb) &&
 -	    pinfo->nr_frags &&
 +	if (!skb_headlen(skb) && pinfo->nr_frags &&
- 	    !PageHighMem(skb_frag_page(frag0))) {
+ 	    !PageHighMem(skb_frag_page(frag0)) &&
+ 	    (!NET_IP_ALIGN || !((skb_frag_off(frag0) + nhoff) & 3))) {
  		NAPI_GRO_CB(skb)->frag0 = skb_frag_address(frag0);
- 		NAPI_GRO_CB(skb)->frag0_len = min_t(unsigned int,
diff --git a/target/linux/generic/backport-5.4/747-v5.5-net-dsa-mv88e6xxx-Add-support-for-port-mirroring.patch b/target/linux/generic/backport-5.4/747-v5.5-net-dsa-mv88e6xxx-Add-support-for-port-mirroring.patch
index a23f45075f..30ff8aeab6 100644
--- a/target/linux/generic/backport-5.4/747-v5.5-net-dsa-mv88e6xxx-Add-support-for-port-mirroring.patch
+++ b/target/linux/generic/backport-5.4/747-v5.5-net-dsa-mv88e6xxx-Add-support-for-port-mirroring.patch
@@ -25,7 +25,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
 
 --- a/drivers/net/dsa/mv88e6xxx/chip.c
 +++ b/drivers/net/dsa/mv88e6xxx/chip.c
-@@ -4926,6 +4926,80 @@ static int mv88e6xxx_port_mdb_del(struct
+@@ -4922,6 +4922,80 @@ static int mv88e6xxx_port_mdb_del(struct
  	return err;
  }
  
@@ -106,7 +106,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  static int mv88e6xxx_port_egress_floods(struct dsa_switch *ds, int port,
  					 bool unicast, bool multicast)
  {
-@@ -4980,6 +5054,8 @@ static const struct dsa_switch_ops mv88e
+@@ -4976,6 +5050,8 @@ static const struct dsa_switch_ops mv88e
  	.port_mdb_prepare       = mv88e6xxx_port_mdb_prepare,
  	.port_mdb_add           = mv88e6xxx_port_mdb_add,
  	.port_mdb_del           = mv88e6xxx_port_mdb_del,
diff --git a/target/linux/generic/backport-5.4/748-v5.5-net-dsa-mv88e6xxx-fix-broken-if-statement-because-of.patch b/target/linux/generic/backport-5.4/748-v5.5-net-dsa-mv88e6xxx-fix-broken-if-statement-because-of.patch
index 37e7a7f2a9..d8ec1240f7 100644
--- a/target/linux/generic/backport-5.4/748-v5.5-net-dsa-mv88e6xxx-fix-broken-if-statement-because-of.patch
+++ b/target/linux/generic/backport-5.4/748-v5.5-net-dsa-mv88e6xxx-fix-broken-if-statement-because-of.patch
@@ -19,7 +19,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
 
 --- a/drivers/net/dsa/mv88e6xxx/chip.c
 +++ b/drivers/net/dsa/mv88e6xxx/chip.c
-@@ -4993,7 +4993,7 @@ static void mv88e6xxx_port_mirror_del(st
+@@ -4989,7 +4989,7 @@ static void mv88e6xxx_port_mirror_del(st
  		if (chip->info->ops->set_egress_port(chip,
  						     direction,
  						     dsa_upstream_port(ds,