diff mbox series

[net-next,v2,1/9] net: hsr: fix incorrect lsdu size in the tag of HSR frames for small frames

Message ID 20200715164012.1222-2-m-karicheri2@ti.com
State Superseded
Headers show
Series Add PRP driver and bug fixes | expand

Commit Message

Murali Karicheri July 15, 2020, 4:40 p.m. UTC 
For small Ethernet frames with size less than minimum size 66 for HSR
vs 60 for regular Ethernet frames, hsr driver currently doesn't pad the
frame to make it minimum size. This results in incorrect LSDU size being
populated in the HSR tag for these frames. Fix this by padding the frame
to the minimum size applicable for HSR.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>

Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>

---
 net/hsr/hsr_forward.c | 3 +++
 1 file changed, 3 insertions(+)

-- 
2.17.1
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Patch

diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c
index ed13760463de..e42fd356f073 100644
--- a/net/hsr/hsr_forward.c
+++ b/net/hsr/hsr_forward.c
@@ -127,6 +127,9 @@  static void hsr_fill_tag(struct sk_buff *skb, struct hsr_frame_info *frame,
 	int lane_id;
 	int lsdu_size;
 
+	/* pad to minimum packet size which is 60 + 6 (HSR tag) */
+	skb_put_padto(skb, ETH_ZLEN + HSR_HLEN);
+
 	if (port->type == HSR_PT_SLAVE_A)
 		lane_id = 0;
 	else