[Linux-stm32] [PATCH net v3 1/9] net: stmmac: selftests: Needs to check the number of Multicast regs

[Jose Abreu]

When running the MC and UC filter tests we setup a multicast address
that its expected to be blocked. If the number of available multicast
registers is zero, driver will always pass the multicast packets which
will fail the test.

Check if available multicast addresses is enough before running the
tests.

Fixes: 091810dbded9 ("net: stmmac: Introduce selftests support")
Signed-off-by: Jose Abreu <Jose.Abreu at synopsys.com>

---
Cc: Giuseppe Cavallaro <peppe.cavallaro at st.com>
Cc: Alexandre Torgue <alexandre.torgue at st.com>
Cc: Jose Abreu <joabreu at synopsys.com>
Cc: "David S. Miller" <davem at davemloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32 at gmail.com>
Cc: netdev at vger.kernel.org
Cc: linux-stm32 at st-md-mailman.stormreply.com
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
index f3d8b9336b8e..13227909287c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
@@ -624,6 +624,8 @@ static int stmmac_test_mcfilt(struct stmmac_priv *priv)
 		return -EOPNOTSUPP;
 	if (netdev_uc_count(priv->dev) >= priv->hw->unicast_filter_entries)
 		return -EOPNOTSUPP;
+	if (netdev_mc_count(priv->dev) >= priv->hw->multicast_filter_bins)
+		return -EOPNOTSUPP;
 
 	while (--tries) {
 		/* We only need to check the mc_addr for collisions */
@@ -666,6 +668,8 @@ static int stmmac_test_ucfilt(struct stmmac_priv *priv)
 
 	if (stmmac_filter_check(priv))
 		return -EOPNOTSUPP;
+	if (netdev_uc_count(priv->dev) >= priv->hw->unicast_filter_entries)
+		return -EOPNOTSUPP;
 	if (netdev_mc_count(priv->dev) >= priv->hw->multicast_filter_bins)
 		return -EOPNOTSUPP;
 
-- 
2.7.4