From: Didier Pallard <didier.pall...@6wind.com>
Two bugs in rx_queue_count function:
- One entry may contain several segments, so 'used' must be multiplied
by number of segments per entry to properly reflect the queue usage.
- rx_queue_count returns the number of entries used in queue, so it ranges
from 0 to max number of entries in queue, not this number minus
one.
Fixes: 8788fec1f269 ("net/mlx5: implement descriptor status API")
Signed-off-by: Didier Pallard <didier.pall...@6wind.com>
---
drivers/net/mlx5/mlx5_rxtx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index 511003d1..2cabd650 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -463,6 +463,7 @@ rx_queue_count(struct mlx5_rxq_data *rxq)
struct rxq_zip *zip = &rxq->zip;
volatile struct mlx5_cqe *cqe;
const unsigned int cqe_n = (1 << rxq->cqe_n);
+ const unsigned int sges_n = (1 << rxq->sges_n);
const unsigned int cqe_cnt = cqe_n - 1;
unsigned int cq_ci, cq_end, cq_cur;
unsigned int used;
@@ -491,7 +492,7 @@ rx_queue_count(struct mlx5_rxq_data *rxq)
used += n;
cqe = &(*rxq->cqes)[cq_ci & cqe_cnt];
}
- used = RTE_MIN(used, (1U << rxq->elts_n) - 1);
+ used = RTE_MIN(used * sges_n, 1U << rxq->elts_n);
return used;
}
--
2.27.0
