patches for DPDK stable branches
 help / color / Atom feed
* [dpdk-stable] [PATCH] net/mlx5: fix transmit descriptor with VLAN insertions
@ 2019-09-03 12:35 Viacheslav Ovsiienko
  2019-09-03 13:05 ` Matan Azrad
                   ` (2 more replies)
  0 siblings, 3 replies; 6+ messages in thread
From: Viacheslav Ovsiienko @ 2019-09-03 12:35 UTC (permalink / raw)
  To: dev; +Cc: matan, stable

If VLAN tag insertion transmit offload is engaged
(DEV_TX_OFFLOAD_VLAN_INSERT in tx queue configuration is set)
the transmit descriptor may be built with wrong format, due to
packet length is not adjusted. Also, the ring buffer wrapup
is not handled correctly.

Fixes: 18a1c20044c0 ("net/mlx5: implement Tx burst template")
Cc: stable@dpdk.org

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
---
 drivers/net/mlx5/mlx5_rxtx.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index 8ec90c3..f540977 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -2861,13 +2861,14 @@ enum mlx5_txcmp_code {
 	memcpy(pdst, buf, MLX5_DSEG_MIN_INLINE_SIZE);
 	buf += MLX5_DSEG_MIN_INLINE_SIZE;
 	pdst += MLX5_DSEG_MIN_INLINE_SIZE;
+	len -= MLX5_DSEG_MIN_INLINE_SIZE;
 	/* Insert VLAN ethertype + VLAN tag. Pointer is aligned. */
 	assert(pdst == RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE));
+	if (unlikely(pdst >= (uint8_t *)txq->wqes_end))
+		pdst = (uint8_t *)txq->wqes;
 	*(uint32_t *)pdst = rte_cpu_to_be_32((RTE_ETHER_TYPE_VLAN << 16) |
 					      loc->mbuf->vlan_tci);
 	pdst += sizeof(struct rte_vlan_hdr);
-	if (unlikely(pdst >= (uint8_t *)txq->wqes_end))
-		pdst = (uint8_t *)txq->wqes;
 	/*
 	 * The WQEBB space availability is checked by caller.
 	 * Here we should be aware of WQE ring buffer wraparound only.
-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, back to index

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-09-03 12:35 [dpdk-stable] [PATCH] net/mlx5: fix transmit descriptor with VLAN insertions Viacheslav Ovsiienko
2019-09-03 13:05 ` Matan Azrad
2019-09-03 13:43   ` Slava Ovsiienko
2019-09-04  6:17     ` Matan Azrad
2019-09-10  7:35 ` Matan Azrad
2019-09-10 12:08 ` [dpdk-stable] [dpdk-dev] " Raslan Darawsheh

patches for DPDK stable branches

Archives are clonable:
	git clone --mirror http://inbox.dpdk.org/stable/0 stable/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 stable stable/ http://inbox.dpdk.org/stable \
		stable@dpdk.org
	public-inbox-index stable


Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.stable


AGPL code for this site: git clone https://public-inbox.org/ public-inbox