[dpdk-dev] [PATCH v3 12/13] enic: expand local Tx mbuf flags variable to 64-bits

John Daley johndale at cisco.com
Fri Jun 3 02:22:56 CEST 2016

The offload flags variable (ol_flags) in rte_mbuf structure is 64-bits,
so local copy of it must be 64-bits too. Moreover bit comparison between
16-bits variable and 64-bits value make no sense. This breaks Tx vlan
IP and L4 offloads.

CID 13218 : Operands don't affect result (CONSTANT_EXPRESSION_RESULT)
result_independent_of_operands: ol_flags & (18014398509481984ULL /* 1ULL
<< 54 */) is always 0 regardless of the values of its operands. This
occurs as the logical operand of if.

Coverity issue: 13218
Fixes: fefed3d1e62c ("enic: new driver")

Suggested-by: Piotr Azarewicz <piotrx.t.azarewicz at intel.com>
Signed-off-by: John Daley <johndale at cisco.com>
This is essentially patch http://www.dpdk.org/dev/patchwork/patch/12642
applied after the enic_send_packet function was melded into the main
transmit funciton.

 drivers/net/enic/enic_rxtx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/enic/enic_rxtx.c b/drivers/net/enic/enic_rxtx.c
index 7527bce..350d04b 100644
--- a/drivers/net/enic/enic_rxtx.c
+++ b/drivers/net/enic/enic_rxtx.c
@@ -384,7 +384,7 @@ uint16_t enic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 	struct vnic_wq *wq = (struct vnic_wq *)tx_queue;
 	struct enic *enic = vnic_dev_priv(wq->vdev);
 	unsigned short vlan_id;
-	unsigned short ol_flags;
+	uint64_t ol_flags;
 	unsigned int wq_desc_avail;
 	int head_idx;
 	struct vnic_wq_buf *buf;

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