From: Joakim Zhang <qiangqing.zhang@nxp.com>
To: peppe.cavallaro@st.com, alexandre.torgue@foss.st.com,
joabreu@synopsys.com, davem@davemloft.net, kuba@kernel.org,
mcoquelin.stm32@gmail.com, andrew@lunn.ch
Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-imx@nxp.com
Subject: [PATCH net 2/2] net: stmmac: fix system hang if change mac address after interface ifdown
Date: Thu, 20 May 2021 20:51:17 +0800 [thread overview]
Message-ID: <20210520125117.1015-3-qiangqing.zhang@nxp.com> (raw)
In-Reply-To: <20210520125117.1015-1-qiangqing.zhang@nxp.com>
Fix system hang with below sequences:
~# ifconfig ethx down
~# ifconfig ethx hw ether xx:xx:xx:xx:xx:xx
After ethx down, stmmac all clocks gated off and then register access causes
system hang.
Fixes: 5ec55823438e ("net: stmmac: add clocks management for gmac driver")
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
---
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index df4ce5977fad..5d956a553434 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -5891,12 +5891,21 @@ static int stmmac_set_mac_address(struct net_device *ndev, void *addr)
struct stmmac_priv *priv = netdev_priv(ndev);
int ret = 0;
+ ret = pm_runtime_get_sync(priv->device);
+ if (ret < 0) {
+ pm_runtime_put_noidle(priv->device);
+ return ret;
+ }
+
ret = eth_mac_addr(ndev, addr);
if (ret)
- return ret;
+ goto set_mac_error;
stmmac_set_umac_addr(priv, priv->hw, ndev->dev_addr, 0);
+set_mac_error:
+ pm_runtime_put(priv->device);
+
return ret;
}
--
2.17.1
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next prev parent reply other threads:[~2021-05-20 12:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-20 12:51 [PATCH net 0/2] net: fixes for stmmac Joakim Zhang
2021-05-20 12:51 ` [PATCH net 1/2] net: stmmac: correct clocks enabled in stmmac_vlan_rx_kill_vid() Joakim Zhang
2021-05-20 12:51 ` Joakim Zhang [this message]
2021-05-20 23:00 ` [PATCH net 0/2] net: fixes for stmmac patchwork-bot+netdevbpf
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