kernel: import accepted MediaTek Ethernet patches

Import some accepted and pending upstream patches for mtk_eth_soc,
replacing some semantically equivalent local patches and fixing issues
when operating the PCS in 1G SGMII mode.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 60 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.15/733-v6.2-01-net-ethernet-mtk_eth_soc-Avoid-truncating-allocation.patch b/target/linux/generic/backport-5.15/733-v6.2-01-net-ethernet-mtk_eth_soc-Avoid-truncating-allocation.patch
new file mode 100644
index 0000000000..2165a824ec
--- /dev/null
+++ b/target/linux/generic/backport-5.15/733-v6.2-01-net-ethernet-mtk_eth_soc-Avoid-truncating-allocation.patch
@@ -0,0 +1,60 @@
+From f3eceaed9edd7c0e0d9fb057613131f92973626f Mon Sep 17 00:00:00 2001
+From: Kees Cook <keescook@chromium.org>
+Date: Fri, 27 Jan 2023 14:38:54 -0800
+Subject: [PATCH] net: ethernet: mtk_eth_soc: Avoid truncating allocation
+
+There doesn't appear to be a reason to truncate the allocation used for
+flow_info, so do a full allocation and remove the unused empty struct.
+GCC does not like having a reference to an object that has been
+partially allocated, as bounds checking may become impossible when
+such an object is passed to other code. Seen with GCC 13:
+
+../drivers/net/ethernet/mediatek/mtk_ppe.c: In function 'mtk_foe_entry_commit_subflow':
+../drivers/net/ethernet/mediatek/mtk_ppe.c:623:18: warning: array subscript 'struct mtk_flow_entry[0]' is partly outside array bounds of 'unsigned char[48]' [-Warray-bounds=]
+  623 |         flow_info->l2_data.base_flow = entry;
+      |                  ^~
+
+Cc: Felix Fietkau <nbd@nbd.name>
+Cc: John Crispin <john@phrozen.org>
+Cc: Sean Wang <sean.wang@mediatek.com>
+Cc: Mark Lee <Mark-MC.Lee@mediatek.com>
+Cc: Lorenzo Bianconi <lorenzo@kernel.org>
+Cc: "David S. Miller" <davem@davemloft.net>
+Cc: Eric Dumazet <edumazet@google.com>
+Cc: Jakub Kicinski <kuba@kernel.org>
+Cc: Paolo Abeni <pabeni@redhat.com>
+Cc: Matthias Brugger <matthias.bgg@gmail.com>
+Cc: netdev@vger.kernel.org
+Cc: linux-arm-kernel@lists.infradead.org
+Cc: linux-mediatek@lists.infradead.org
+Signed-off-by: Kees Cook <keescook@chromium.org>
+Reviewed-by: Simon Horman <simon.horman@corigine.com>
+Link: https://lore.kernel.org/r/20230127223853.never.014-kees@kernel.org
+Signed-off-by: Paolo Abeni <pabeni@redhat.com>
+---
+ drivers/net/ethernet/mediatek/mtk_ppe.c | 3 +--
+ drivers/net/ethernet/mediatek/mtk_ppe.h | 1 -
+ 2 files changed, 1 insertion(+), 3 deletions(-)
+
+--- a/drivers/net/ethernet/mediatek/mtk_ppe.c
++++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
+@@ -601,8 +601,7 @@ mtk_foe_entry_commit_subflow(struct mtk_
+ 	u32 ib1_mask = mtk_get_ib1_pkt_type_mask(ppe->eth) | MTK_FOE_IB1_UDP;
+ 	int type;
+ 
+-	flow_info = kzalloc(offsetof(struct mtk_flow_entry, l2_data.end),
+-			    GFP_ATOMIC);
++	flow_info = kzalloc(sizeof(*flow_info), GFP_ATOMIC);
+ 	if (!flow_info)
+ 		return;
+ 
+--- a/drivers/net/ethernet/mediatek/mtk_ppe.h
++++ b/drivers/net/ethernet/mediatek/mtk_ppe.h
+@@ -277,7 +277,6 @@ struct mtk_flow_entry {
+ 		struct {
+ 			struct mtk_flow_entry *base_flow;
+ 			struct hlist_node list;
+-			struct {} end;
+ 		} l2_data;
+ 	};
+ 	struct rhash_head node;