[PATCH AUTOSEL 4.9 09/14] stmmac: fix valid numbers of unicast filter entries

[Sasha Levin]

From: Jongsung Kim <neidhard.kim@xxxxxxx>

[ Upstream commit edf2ef7242805e53ec2e0841db26e06d8bc7da70 ]

Synopsys DWC Ethernet MAC can be configured to have 1..32, 64, or
128 unicast filter entries. (Table 7-8 MAC Address Registers from
databook) Fix dwmac1000_validate_ucast_entries() to accept values
between 1 and 32 in addition.

Signed-off-by: Jongsung Kim <neidhard.kim@xxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 890e4b083f4f..2019e163e0e9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -71,7 +71,7 @@ static int dwmac1000_validate_mcast_bins(int mcast_bins)
  * Description:
  * This function validates the number of Unicast address entries supported
  * by a particular Synopsys 10/100/1000 controller. The Synopsys controller
- * supports 1, 32, 64, or 128 Unicast filter entries for it's Unicast filter
+ * supports 1..32, 64, or 128 Unicast filter entries for it's Unicast filter
  * logic. This function validates a valid, supported configuration is
  * selected, and defaults to 1 Unicast address if an unsupported
  * configuration is selected.
@@ -81,8 +81,7 @@ static int dwmac1000_validate_ucast_entries(int ucast_entries)
 	int x = ucast_entries;
 
 	switch (x) {
-	case 1:
-	case 32:
+	case 1 ... 32:
 	case 64:
 	case 128:
 		break;
-- 
2.17.1