From: Michal Krawczyk <[email protected]>
On RX path, after receiving bunch of packets, variable tracking
available descriptors in HW queue was not updated.
To fix this issue, variable tracking used descriptors must be updated
after receiving packets - it must be reduced by the amount of received
descriptors in current batch.
Additionally, variable next_to_clean in rx_ring must be updated before
entering ena_populate_rx_queue() to keep it up to date with the current
ring state.
Fixes: 1daff5260ff8 ("net/ena: use unmasked head and tail")
Signed-off-by: Michal Krawczyk <[email protected]>
---
drivers/net/ena/ena_ethdev.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 90cf2ad..b4c713f 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -1575,13 +1575,13 @@ static uint16_t eth_ena_recv_pkts(void *rx_queue,
struct rte_mbuf **rx_pkts,
recv_idx++;
}
- desc_in_use += 1;
+ rx_ring->next_to_clean = next_to_clean;
+
+ desc_in_use = desc_in_use - completed + 1;
/* Burst refill to save doorbells, memory barriers, const interval */
if (ring_size - desc_in_use > ENA_RING_DESCS_RATIO(ring_size))
ena_populate_rx_queue(rx_ring, ring_size - desc_in_use);
- rx_ring->next_to_clean = next_to_clean;
-
return recv_idx;
}
--
1.8.3.1
