[dpdk-dev] [PATCH 12/14] net/enic: check maximum packet size in Tx prepare handler

[John Daley]

From: Hyong Youb Kim <hyon...@cisco.com>

The default tx handler checks the maximum packet size. Check it in the
prepare handler too. WQ stops working if the app/driver tries to send
oversized packets, so these checks are unavoidable.

Signed-off-by: Hyong Youb Kim <hyon...@cisco.com>
Reviewed-by: John Daley <johnd...@cisco.com>
---
 drivers/net/enic/enic_rxtx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/enic/enic_rxtx.c b/drivers/net/enic/enic_rxtx.c
index 7dec486fe..04a77fcb4 100644
--- a/drivers/net/enic/enic_rxtx.c
+++ b/drivers/net/enic/enic_rxtx.c
@@ -563,6 +563,10 @@ uint16_t enic_prep_pkts(void *tx_queue, struct rte_mbuf 
**tx_pkts,
 
        for (i = 0; i != nb_pkts; i++) {
                m = tx_pkts[i];
+               if (unlikely(m->pkt_len > ENIC_TX_MAX_PKT_SIZE)) {
+                       rte_errno = EINVAL;
+                       return i;
+               }
                ol_flags = m->ol_flags;
                if (ol_flags & wq->tx_offload_notsup_mask) {
                        rte_errno = ENOTSUP;
-- 
2.16.2