lkml.org 
[lkml]   [2019]   [Jul]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH AUTOSEL 4.19 019/158] net: stmmac: dwmac4/5: Clear unused address entries
Date
From: Jose Abreu <Jose.Abreu@synopsys.com>

[ Upstream commit 0620ec6c62a5a07625b65f699adc5d1b90394ee6 ]

In case we don't use a given address entry we need to clear it because
it could contain previous values that are no longer valid.

Found out while running stmmac selftests.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.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 | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index 7e5d5db0d516..a2f3db39221e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -444,14 +444,20 @@ static void dwmac4_set_filter(struct mac_device_info *hw,
* are required
*/
value |= GMAC_PACKET_FILTER_PR;
- } else if (!netdev_uc_empty(dev)) {
- int reg = 1;
+ } else {
struct netdev_hw_addr *ha;
+ int reg = 1;

netdev_for_each_uc_addr(ha, dev) {
dwmac4_set_umac_addr(hw, ha->addr, reg);
reg++;
}
+
+ while (reg <= GMAC_MAX_PERFECT_ADDRESSES) {
+ writel(0, ioaddr + GMAC_ADDR_HIGH(reg));
+ writel(0, ioaddr + GMAC_ADDR_LOW(reg));
+ reg++;
+ }
}

writel(value, ioaddr + GMAC_PACKET_FILTER);
--
2.20.1
\
 
 \ /
  Last update: 2019-07-15 17:45    [W:0.425 / U:8.892 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site