diff mbox

[dpdk-dev,2/3] nfp: fix problem with pkt_len to data_len conversion

Message ID 1490093001-15710-2-git-send-email-alejandro.lucero@netronome.com (mailing list archive)
State Accepted, archived
Delegated to: Ferruh Yigit
Headers

Checks

Context Check Description
ci/Intel-compilation success Compilation OK
ci/checkpatch success coding style OK

Commit Message

Alejandro Lucero March 21, 2017, 10:43 a.m. UTC 
  Chained mbufs hold data_len as the length of that particular mbuf
and pkt_len as the full packet length including all the chained
mbufs. It is not clear from the mbuf definition if pkt_len should
be set for all the mbufs in a chain, but code there for handling
mbufs suggests just the first mbuf requires to have pkt_len set.

NFP PMD was assuming pkt_len is set in all the chained mbufs and
unit tests for gather dma were building mbufs with pkt_len always
set. This patch gets rid of that assumption.

Fixes: b812daadad0d (\"nfp: add Rx and Tx\")

Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>
---
 drivers/net/nfp/nfp_net.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
index 9d9420d..6155d7c 100644
--- a/drivers/net/nfp/nfp_net.c
+++ b/drivers/net/nfp/nfp_net.c
@@ -2097,6 +2097,7 @@  uint32_t nfp_net_txq_full(struct nfp_net_txq *txq)
 		 * Checksum and VLAN flags just in the first descriptor for a
 		 * multisegment packet, but TSO info needs to be in all of them.
 		 */
+		txd.data_len = pkt->pkt_len;
 		nfp_net_tx_tso(txq, &txd, pkt);
 		nfp_net_tx_cksum(txq, &txd, pkt);
 
@@ -2132,7 +2133,7 @@  uint32_t nfp_net_txq_full(struct nfp_net_txq *txq)
 
 			/* Filling descriptors fields */
 			txds->dma_len = dma_size;
-			txds->data_len = pkt->pkt_len;
+			txds->data_len = txd.data_len;
 			txds->dma_addr_hi = (dma_addr >> 32) & 0xff;
 			txds->dma_addr_lo = (dma_addr & 0xffffffff);
 			ASSERT(free_descs > 0);