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Trigger reset in ENA if there are too many Rx descriptors

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Whenever the driver will receive too many descriptors from the device,
it should trigger the device reset, as it is indicating that the device
is in invalid state.

Submitted by:  Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by:  Amazon, Inc.
This commit is contained in:
Marcin Wojtas 2019-05-30 13:13:15 +00:00
parent 277f11c401
commit c9b099ec94
1 changed files with 6 additions and 1 deletions
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7
sys/dev/ena/ena.c
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@ -1717,7 +1717,12 @@ ena_rx_cleanup(struct ena_ring *rx_ring)
error:
counter_u64_add(rx_ring->rx_stats.bad_desc_num, 1);
return (RX_BUDGET - budget);
/* Too many desc from the device. Trigger reset */
adapter->reset_reason = ENA_REGS_RESET_TOO_MANY_RX_DESCS;
adapter->trigger_reset = true;
return (0);
}
/*********************************************************************