From: John Daley <johndale@cisco.com>
Date: Fri, 3 Jun 2016 00:22:55 +0000 (-0700)
Subject: net/enic: add an assert macro
X-Git-Tag: spdx-start~6537
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=1a4b563fa810fd08e5e8c51117270402c10d1d88;p=dpdk.git

net/enic: add an assert macro

Add an ASSERT macro for the enic driver which is enabled when the log
level is >= RTE_LOG_DEBUG. Assert that number of mbufs to return to
the pool in the Tx function is never greater than the max allowed.

Signed-off-by: John Daley <johndale@cisco.com>
---

diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
index 4eb28eea48..4b76e6d4f4 100644
--- a/drivers/net/enic/enic.h
+++ b/drivers/net/enic/enic.h
@@ -187,6 +187,18 @@ enic_ring_incr(uint32_t n_descriptors, uint32_t idx)
 	return idx;
 }
 
+#if RTE_LOG_LEVEL >= RTE_LOG_DEBUG
+#define ENIC_ASSERT(cond)				\
+	do {								\
+		if (unlikely(!(cond))) {				\
+			rte_panic("line %d\tassert \"" #cond "\""	\
+					"failed\n", __LINE__);		\
+		}							\
+	} while (0)
+#else
+#define ENIC_ASSERT(cond) do {} while (0)
+#endif
+
 extern void enic_fdir_stats_get(struct enic *enic,
 	struct rte_eth_fdir_stats *stats);
 extern int enic_fdir_add_fltr(struct enic *enic,
diff --git a/drivers/net/enic/enic_rxtx.c b/drivers/net/enic/enic_rxtx.c
index 98d93bb40f..b9713252af 100644
--- a/drivers/net/enic/enic_rxtx.c
+++ b/drivers/net/enic/enic_rxtx.c
@@ -343,6 +343,7 @@ static inline void enic_free_wq_bufs(struct vnic_wq *wq, u16 completed_index)
 		buf = &wq->bufs[tail_idx];
 		m = (struct rte_mbuf *)(buf->mb);
 		if (likely(m->pool == pool)) {
+			ENIC_ASSERT(nb_free < ENIC_MAX_WQ_DESCS);
 			free[nb_free++] = m;
 		} else {
 			rte_mempool_put_bulk(pool, (void *)free, nb_free);