[PATCH 3/5] Revert "net/qede: fix maximum Rx packet length"

[edwin.brossette at 6wind.com]

From: Edwin Brossette <edwin.brossette at 6wind.com>

This reverts commit d8ded501e05ce879f27f0ed1df7721a88b737e25.

The maximum length for Rx packets computed in qede_rx_queue_setup()
takes Ethernet CRC into account. This is not consistent with the value
computed in qede_set_mtu(). RTE_ETHER_CRC_LEN should not be added to
max_rx_pktlen, as HW does not include CRC in received frames passed to
host.

The original commit tries to fix another bug with this inappropriate
patch: packets with size nearing MTU limit are being dropped. This is
not because CRC length is not being accounted for in Rx buff size, but
because of the flooring applied to it: the rx_buff size computed is
lower than expected because we try to align it.

This issue will be fixed in the following patch.

CC: stable at dpdk.org

Signed-off-by: Edwin Brossette <edwin.brossette at 6wind.com>
Acked-by: Didier Pallard <didier.pallard at 6wind.com>
---
 drivers/net/qede/qede_rxtx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/qede/qede_rxtx.c b/drivers/net/qede/qede_rxtx.c
index 601fcb30b357..fe839a6ba844 100644
--- a/drivers/net/qede/qede_rxtx.c
+++ b/drivers/net/qede/qede_rxtx.c
@@ -235,7 +235,7 @@ qede_rx_queue_setup(struct rte_eth_dev *dev, uint16_t qid,
 		dev->data->rx_queues[qid] = NULL;
 	}
 
-	max_rx_pktlen = dev->data->mtu + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN;
+	max_rx_pktlen = dev->data->mtu + RTE_ETHER_HDR_LEN;
 
 	/* Fix up RX buffer size */
 	bufsz = (uint16_t)rte_pktmbuf_data_room_size(mp) - RTE_PKTMBUF_HEADROOM;
-- 
2.35.0.4.g44a5d4affccf