net: dsa: sja1105: Fix memory leak on meta state machine error path
When RX timestamping is enabled and two link-local (non-meta) frames are
received in a row, this constitutes an error.
The tagger is always caching the last link-local frame, in an attempt to
merge it with the meta follow-up frame when that arrives. To recover
from the above error condition, the initial cached link-local frame is
dropped and the second frame in a row is cached (in expectance of the
second meta frame).
However, when dropping the initial link-local frame, its backing memory
was being leaked.
Fixes: f3097be21b
("net: dsa: sja1105: Add a state machine for RX timestamping")
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -165,6 +165,7 @@ static struct sk_buff
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"Expected meta frame, is %12llx "
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"in the DSA master multicast filter?\n",
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SJA1105_META_DMAC);
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kfree_skb(sp->data->stampable_skb);
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}
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/* Hold a reference to avoid dsa_switch_rcv
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