From: Ido Segev <idose@amazon.com>
Date: Tue, 26 Jan 2021 18:32:22 +0000 (+0100)
Subject: net/ena: flush Rx buffers memory pool cache
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=4387e81c94f4702ec2eb2037df2bfa19927309d7;p=dpdk.git

net/ena: flush Rx buffers memory pool cache

As the refill called as part of ena_start(), we end up the refill
progress with stuck buffers at the caller core cache.

Calling to flush the cache results with invalidate this cache and free
those stuck buffers.

Fixes: 1173fca25af9 ("ena: add polling-mode driver")
Cc: stable@dpdk.org

Signed-off-by: Ido Segev <idose@amazon.com>
Reviewed-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Igor Chauskin <igorch@amazon.com>
---

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index c796af4aa7..dde6e9ce8b 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -1246,6 +1246,10 @@ static int ena_queue_start(struct ena_ring *ring)
 		PMD_INIT_LOG(ERR, "Failed to populate rx ring !");
 		return ENA_COM_FAULT;
 	}
+	/* Flush per-core RX buffers pools cache as they can be used on other
+	 * cores as well.
+	 */
+	rte_mempool_cache_flush(NULL, ring->mb_pool);
 
 	return 0;
 }