[dpdk-stable] [PATCH 19.11 v2] net/mlx5: fix storing the synched MAC to internal table

["Dey, Souvik" <sodey@rbbn.com>]

From: Souvik Dey <sodey@rbbn.com>

[ upstream commit 493f0bb51c1144eedcff2bba199cab1b64ff9fd0 ]

As the internal MAC table is divided into Unicast and Multicast address
sections, we should check the type of synched MAC address before storing
it to the internal table. Currently the check is not done, and the
synched MAC of 33:33:00:00:00:01 gets stored in the unicast section
(mostly index 1) causing all subsequent mlx5_set_mc_addr_list()
to fail with error -EADDRINUSE, as the mac_list contains the MAC
33:33:00:00:00:01. This denies adding of any new multicast address to
the internal list and also fails to add the MAC address to the device
in case of SR-IOV VF.

Fixes: f22442cb5d42 ("net/mlx5: reduce Netlink commands dependencies")
Fixes: ccdcba53a3f4 ("net/mlx5: use Netlink to add/remove MAC addresses")

Signed-off-by: Souvik Dey <sodey@rbbn.com>
---

v2:
* Fixing the compilation errors.

---
 drivers/net/mlx5/mlx5_nl.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_nl.c b/drivers/net/mlx5/mlx5_nl.c
index 64580b9..6db372e 100644
--- a/drivers/net/mlx5/mlx5_nl.c
+++ b/drivers/net/mlx5/mlx5_nl.c
@@ -678,11 +678,24 @@ mlx5_nl_mac_addr_sync(struct rte_eth_dev *dev)
 				break;
 		if (j != MLX5_MAX_MAC_ADDRESSES)
 			continue;
-		/* Find the first entry available. */
-		for (j = 0; j != MLX5_MAX_MAC_ADDRESSES; ++j) {
-			if (rte_is_zero_ether_addr(&dev->data->mac_addrs[j])) {
-				dev->data->mac_addrs[j] = macs[i];
-				break;
+		if (rte_is_multicast_ether_addr(&dev->data->mac_addrs[j])) {
+			/* Find the first entry available. */
+			for (j = MLX5_MAX_UC_MAC_ADDRESSES;
+					j != MLX5_MAX_MAC_ADDRESSES; ++j) {
+				if (rte_is_zero_ether_addr(
+						&dev->data->mac_addrs[j])) {
+					dev->data->mac_addrs[j] = macs[i];
+					break;
+				}
+			}
+		} else {
+			/* Find the first entry available. */
+			for (j = 0; j != MLX5_MAX_UC_MAC_ADDRESSES; ++j) {
+				if (rte_is_zero_ether_addr(
+						&dev->data->mac_addrs[j])) {
+					dev->data->mac_addrs[j] = macs[i];
+					break;
+				}
 			}
 		}
 	}
-- 
2.9.3.windows.1


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