[dpdk-dev] [PATCH v3 01/11] net/sfc: fix get xstats by ID callback to use MAC stats lock

[Andrew Rybchenko]

From: Ivan Ilchenko <ivan.ilche...@oktetlabs.ru>

Add MAC stats lock in get xstats by id callback before reading
number of supported MAC stats.

Fixes: 73280c1e4ff ("net/sfc: support xstats retrieval by ID")
Cc: sta...@dpdk.org

Signed-off-by: Ivan Ilchenko <ivan.ilche...@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <andrew.rybche...@oktetlabs.ru>
Reviewed-by: Andy Moreton <amore...@xilinx.com>
---
 drivers/net/sfc/sfc_ethdev.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/sfc/sfc_ethdev.c b/drivers/net/sfc/sfc_ethdev.c
index 88896db1f8..d4ac61ff76 100644
--- a/drivers/net/sfc/sfc_ethdev.c
+++ b/drivers/net/sfc/sfc_ethdev.c
@@ -789,12 +789,14 @@ sfc_xstats_get_by_id(struct rte_eth_dev *dev, const 
uint64_t *ids,
        int ret;
        int rc;
 
-       if (unlikely(values == NULL) ||
-           unlikely((ids == NULL) && (n < port->mac_stats_nb_supported)))
-               return port->mac_stats_nb_supported;
-
        rte_spinlock_lock(&port->mac_stats_lock);
 
+       if (unlikely(values == NULL) ||
+           unlikely(ids == NULL && n < port->mac_stats_nb_supported)) {
+               ret = port->mac_stats_nb_supported;
+               goto unlock;
+       }
+
        rc = sfc_port_update_mac_stats(sa);
        if (rc != 0) {
                SFC_ASSERT(rc > 0);
-- 
2.30.2