[dpdk-dev] [PATCH v2] enic: fix name of hash table used for enic classifiers

Nelson Escobar neescoba at cisco.com
Fri Jun 24 01:10:02 CEST 2016

The enic_clsf_init() function is called once per enic instance, but it
used a static name to create the hash table.  Consequently when using
more than one enic instance, there was a name collision which caused

EAL: memzone_reserve_aligned_thread_unsafe():
  memzone<RG_HT_enicpmd_clsf_hash> already exists
RING: Cannot reserve memory
HASH: memory allocation failed
PMD: rte_enic_pmd: Init of hash table for clsf failed.
  Flow director feature will not work

This patch changes the name to be unique per enic instance.

Fixes: fefed3d1e62c ("enic: new driver")

Signed-off-by: Nelson Escobar <neescoba at cisco.com>
Reviewed-by: John Daley <johndale at cisco.com>
  - use snprintf instead of sprintf

 drivers/net/enic/enic_clsf.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/enic/enic_clsf.c b/drivers/net/enic/enic_clsf.c
index edb56e1..2050818 100644
--- a/drivers/net/enic/enic_clsf.c
+++ b/drivers/net/enic/enic_clsf.c
@@ -239,15 +239,16 @@ void enic_clsf_destroy(struct enic *enic)
 int enic_clsf_init(struct enic *enic)
+	char clsf_name[RTE_HASH_NAMESIZE];
 	struct rte_hash_parameters hash_params = {
-		.name = "enicpmd_clsf_hash",
+		.name = clsf_name,
 		.key_len = sizeof(struct rte_eth_fdir_filter),
 		.hash_func = DEFAULT_HASH_FUNC,
 		.hash_func_init_val = 0,
 		.socket_id = SOCKET_ID_ANY,
+	snprintf(clsf_name, RTE_HASH_NAMESIZE, "enic_clsf_%s", enic->bdf_name);
 	enic->fdir.hash = rte_hash_create(&hash_params);
 	memset(&enic->fdir.stats, 0, sizeof(enic->fdir.stats));
 	enic->fdir.stats.free = ENICPMD_FDIR_MAX;

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