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net/vmxnet3: replenish ring buffers in Rx

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vmxnet3 Rx processing should replenish ring buffers after new buffers
are available to prevent the interface from getting stuck in a state
that no new work is processed.

Signed-off-by: David Harton <dharton@cisco.com>
Acked-by: Shrikrishna Khare <skhare@vmware.com>
This commit is contained in:
David Harton 2017-08-25 11:22:11 -04:00 committed by Ferruh Yigit
parent 3720d3d7a0
commit c740ba20c8
1 changed files with 17 additions and 0 deletions
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17
drivers/net/vmxnet3/vmxnet3_rxtx.c
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@ -880,6 +880,23 @@ rcd_done:
}
}
if (unlikely(nb_rxd == 0)) {
uint32_t avail;
for (ring_idx = 0; ring_idx < VMXNET3_RX_CMDRING_SIZE; ring_idx++) {
avail = vmxnet3_cmd_ring_desc_avail(&rxq->cmd_ring[ring_idx]);
if (unlikely(avail > 0)) {
/* try to alloc new buf and renew descriptors */
vmxnet3_post_rx_bufs(rxq, ring_idx);
}
}
if (unlikely(rxq->shared->ctrl.updateRxProd)) {
for (ring_idx = 0; ring_idx < VMXNET3_RX_CMDRING_SIZE; ring_idx++) {
VMXNET3_WRITE_BAR0_REG(hw, rxprod_reg[ring_idx] + (rxq->queue_id * VMXNET3_REG_ALIGN),
rxq->cmd_ring[ring_idx].next2fill);
}
}
}
return nb_rx;
}