net: arc_emac: enable tx interrupts

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In the current implementation the cleaning of tx ring is done by the
NAPI poll handler, which is scheduled after rx interrupts. Thus, in
absence of received packets the reclaim of used tx buffers is never
executed, blocking further transmission.

This can be easily reproduced starting the transmission of a UDP flow
with iperf, which blocks almost immediately because skbs are not
returned to the stack and the socket send buffer becomes full.

The patch enables tx interrupts so that the tx reclaim is scheduled
after completed transmissions.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Beniamino Galvani 2014-09-10 22:50:02 +02:00 • committed by David S. Miller

parent 1d7efe9dfa

commit 7ce7679d6b

1 changed files with 5 additions and 5 deletions

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drivers/net/ethernet/arc/emac_main.c

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