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ixgbe: reorder Tx cleanup so that if adapter will reset we don't rearm

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The code as it existed could re-arm the queues when it was requesting a HW
reset due to a TX hang. Instead of doing that this change makes it so that
we will just exit if the hardware is believed to be hung.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2010-11-16 19:26:58 -08:00 committed by Jeff Kirsher
parent 80fba3f434
commit b953799ee2
1 changed files with 18 additions and 19 deletions
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37
drivers/net/ixgbe/ixgbe_main.c
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@ -735,8 +735,8 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
struct ixgbe_adapter *adapter = q_vector->adapter;
union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
struct ixgbe_tx_buffer *tx_buffer_info;
unsigned int i, eop, count = 0;
unsigned int total_bytes = 0, total_packets = 0;
u16 i, eop, count = 0;
i = tx_ring->next_to_clean;
eop = tx_ring->tx_buffer_info[i].next_to_watch;
@ -771,6 +771,23 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
}
tx_ring->next_to_clean = i;
tx_ring->total_bytes += total_bytes;
tx_ring->total_packets += total_packets;
u64_stats_update_begin(&tx_ring->syncp);
tx_ring->stats.packets += total_packets;
tx_ring->stats.bytes += total_bytes;
u64_stats_update_end(&tx_ring->syncp);
if (check_for_tx_hang(tx_ring) &&
ixgbe_check_tx_hang(adapter, tx_ring, i)) {
/* schedule immediate reset if we believe we hung */
e_info(probe, "tx hang %d detected, resetting "
"adapter\n", adapter->tx_timeout_count + 1);
ixgbe_tx_timeout(adapter->netdev);
/* the adapter is about to reset, no point in enabling stuff */
return true;
}
#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
@ -786,24 +803,6 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
}
}
if (check_for_tx_hang(tx_ring) &&
ixgbe_check_tx_hang(adapter, tx_ring, i)) {
/* schedule immediate reset if we believe we hung */
e_info(probe, "tx hang %d detected, resetting "
"adapter\n", adapter->tx_timeout_count + 1);
ixgbe_tx_timeout(adapter->netdev);
}
/* re-arm the interrupt */
if (count >= tx_ring->work_limit)
ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
tx_ring->total_bytes += total_bytes;
tx_ring->total_packets += total_packets;
u64_stats_update_begin(&tx_ring->syncp);
tx_ring->stats.packets += total_packets;
tx_ring->stats.bytes += total_bytes;
u64_stats_update_end(&tx_ring->syncp);
return count < tx_ring->work_limit;
}