[dpdk-dev] [PATCH v2] net/iavf: fix driver crash when enable TSO

[dpdk-dev] [PATCH v2] net/iavf: fix driver crash when enable TSO

[Ting Xu]

The iavf driver crashes when forwarding packets with TSO
enabled. The reason is that the tx context descriptor
configuration is not transferred to tx-ring. This step is
added in this patch.

Fixes: 584798f8e8ab ("net/avf: fix unused variables and label")
Cc: stable@dpdk.org

Signed-off-by: Ting Xu <ting.xu@intel.com>
---
 drivers/net/iavf/iavf_rxtx.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c
index 2d37c1705..d8eb6d296 100644
--- a/drivers/net/iavf/iavf_rxtx.c
+++ b/drivers/net/iavf/iavf_rxtx.c
@@ -1580,6 +1580,9 @@ iavf_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 			/* Setup TX context descriptor if required */
 			uint64_t cd_type_cmd_tso_mss =
 				IAVF_TX_DESC_DTYPE_CONTEXT;
+			volatile struct iavf_tx_context_desc *ctx_txd =
+				(volatile struct iavf_tx_context_desc *)
+							&txr[tx_id];
 
 			txn = &sw_ring[txe->next_id];
 			RTE_MBUF_PREFETCH_TO_FREE(txn->mbuf);
@@ -1593,6 +1596,9 @@ iavf_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 				cd_type_cmd_tso_mss |=
 					iavf_set_tso_ctx(tx_pkt, tx_offload);
 
+			ctx_txd->type_cmd_tso_mss =
+				rte_cpu_to_le_64(cd_type_cmd_tso_mss);
+
 			IAVF_DUMP_TX_DESC(txq, &txr[tx_id], tx_id);
 			txe->last_id = tx_last;
 			tx_id = txe->next_id;
-- 
2.17.1

Re: [dpdk-dev] [PATCH v2] net/iavf: fix driver crash when enable TSO

[Zhang, Qi Z]

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Ting Xu
> Sent: Wednesday, July 17, 2019 12:12 AM
> To: dev@dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Wu, Jingjing
> <jingjing.wu@intel.com>; Xu, Ting <ting.xu@intel.com>; stable@dpdk.org
> Subject: [dpdk-dev] [PATCH v2] net/iavf: fix driver crash when enable TSO
> 
> The iavf driver crashes when forwarding packets with TSO enabled. The reason
> is that the tx context descriptor configuration is not transferred to tx-ring. This
> step is added in this patch.
> 
> Fixes: 584798f8e8ab ("net/avf: fix unused variables and label")

Above commit does not introduce the problem.
Correct fix line to,
Fixes: a2b29a7733ef ("net/avf: enable basic Rx Tx")


> Cc: stable@dpdk.org
> 
> Signed-off-by: Ting Xu <ting.xu@intel.com>
> ---

Acked-by: Qi Zhang <qi.z.zhang@intel.com>

Applied to dpdk-next-net-intel.

Thanks
Qi