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cns3xxx: fix RX softIRQ loop 

Already reschedule when 1 or more frames came in.

Checking for a full queue could produce a re-schedule loop as
the checked RX ring location could contain undefined values
depending on activity in previous loops.

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
lede-17.01
Koen Vandeputte 2016-06-16 13:48:39 +02:00 committed by John Crispin
parent 137b1ac5e8
commit f532191c1c
1 changed files with 2 additions and 2 deletions
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4
target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c
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@ -717,8 +717,8 @@ static int eth_poll(struct napi_struct *napi, int budget)
enable_irq(sw->rx_irq); enable_irq(sw->rx_irq);
budget = 0; budget = 0;
/* if rx descriptors are full schedule another poll */ /* If 1 or more frames came in during IRQ enable, re-schedule */
if (rx_ring->desc[(i-1) & (RX_DESCS-1)].cown) if (rx_ring->desc[i].cown)
eth_schedule_poll(sw); eth_schedule_poll(sw);
} }