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Receiving a GSO packet in dev_gro_receive() is not uncommon
in stacked devices, or devices partially implementing LRO/GRO
like bnx2x. GRO is implementing the aggregation the device
was not able to do itself.
Current code causes reorders, like in following case :
For a given flow where sender sent 3 packets P1,P2,P3,P4
Receiver might receive P1 as a single packet, stored in GRO engine.
Then P2-P4 are received as a single GSO packet, immediately given to
upper stack, while P1 is held in GRO engine.
This patch will make sure P1 is given to upper stack, then P2-P4
immediately after.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
d61d072e87