[PATCH AUTOSEL 4.14 312/371] net: stmmac: gmac4+: Not all Unicast addresses may be available

Sasha Levin
2020-01-16T18:14:54Z

From: Jose Abreu <Jose.Abreu@synopsys.com>

[ Upstream commit 25683bab09a70542b9f8e3e28f79b3369e56701f ]

Some setups may not have all Unicast addresses filters available. Check
the number of available filters before trying to setup it.

Fixes: 477286b53f55 ("stmmac: add GMAC4 core support")
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index 8445af580cb6..e5566c121525 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -438,7 +438,7 @@ static void dwmac4_set_filter(struct mac_device_info *hw,
}

/* Handle multiple unicast addresses */
- if (netdev_uc_count(dev) > GMAC_MAX_PERFECT_ADDRESSES) {
+ if (netdev_uc_count(dev) > hw->unicast_filter_entries) {
/* Switch to promiscuous mode if more than 128 addrs
* are required
*/
--
2.20.1