[PATCH net] geneve: fix hint header definition wrt endianness

[Antoine Tenart <atenart@kernel.org>]

Bitfields are packed differently depending on the endianness, take it into
account in the GRO hint header definition.

Fixes: e0a12cbf262b ("geneve: add GRO hint output path")
Cc: Paolo Abeni <pabeni@redhat.com>
Reported-by: Sashiko <sashiko-bot@kernel.org>
Closes: https://sashiko.dev/#/patchset/20260529144713.780938-1-atenart%40kernel.org
Signed-off-by: Antoine Tenart <atenart@kernel.org>
---
 drivers/net/geneve.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index 9afff7bcaa0b..b25b0c4de4d1 100644
--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -43,8 +43,17 @@ MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
 #define GENEVE_OPT_GRO_HINT_LEN		1
 
 struct geneve_opt_gro_hint {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
 	u8	inner_proto_id:2,
-		nested_is_v6:1;
+		nested_is_v6:1,
+		rsvd:5;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+	u8	rsvd:5,
+		nested_is_v6:1,
+		inner_proto_id:2;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
 	u8	nested_nh_offset;
 	u8	nested_tp_offset;
 	u8	nested_hdr_len;
-- 
2.55.0