[PATCH] net: stmmac: set multicast filter to zero if feature is unsupported

[Nikunj Kela]

Hash based multicast filtering is an optional feature. Currently,
driver overrides the value of multicast_filter_bins based on the hash
table size. If the feature is not supported, hash table size reads 0
however the value of multicast_filter_bins remains set to default
HASH_TABLE_SIZE which is incorrect. Let's override it to 0 if the
feature is unsupported.

Signed-off-by: Nikunj Kela <nikunj.kela at sima.ai>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 085c09039af4..ccea9f811a05 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7241,6 +7241,9 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
 					(BIT(priv->dma_cap.hash_tb_sz) << 5);
 			priv->hw->mcast_bits_log2 =
 					ilog2(priv->hw->multicast_filter_bins);
+		} else {
+			priv->hw->multicast_filter_bins = 0;
+			priv->hw->mcast_bits_log2 = 0;
 		}
 
 		/* TXCOE doesn't work in thresh DMA mode */
-- 
2.34.1