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net: dsa: tag_ocelot_8021q: fix broken reception

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The blamed commit changed the dsa_8021q_rcv() calling convention to
accept pre-populated source_port and switch_id arguments. If those are
not available, as in the case of tag_ocelot_8021q, the arguments must be
pre-initialized with -1.

Due to the bug of passing uninitialized arguments in tag_ocelot_8021q,
dsa_8021q_rcv() does not detect that it needs to populate the
source_port and switch_id, and this makes dsa_conduit_find_user() fail,
which leads to packet loss on reception.

Fixes: dcfe767378 ("net: dsa: tag_sja1105: absorb logic for not overwriting precise info into dsa_8021q_rcv()")
Signed-off-by: Robert Hodaszi <robert.hodaszi@digi.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://patch.msgid.link/20241211144741.1415758-1-robert.hodaszi@digi.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Robert Hodaszi 2024-12-11 15:47:41 +01:00 committed by Jakub Kicinski
parent 5af53577c6
commit 36ff681d22
1 changed files with 1 additions and 1 deletions
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2
net/dsa/tag_ocelot_8021q.c
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@ -79,7 +79,7 @@ static struct sk_buff *ocelot_xmit(struct sk_buff *skb,
static struct sk_buff *ocelot_rcv(struct sk_buff *skb,
struct net_device *netdev)
{
int src_port, switch_id;
int src_port = -1, switch_id = -1;
dsa_8021q_rcv(skb, &src_port, &switch_id, NULL, NULL);