diff options
| author | Joakim Zhang <qiangqing.zhang@nxp.com> | 2021-05-20 15:51:17 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-05-21 01:49:33 +0300 |
| commit | 4691ffb18ac908609aab07d13af7995b6b89d33c (patch) | |
| tree | 4b71955bf3a144a884804b9f96f7aa3d70b1c44c /drivers/net/ethernet | |
| parent | b3dcb312778664bfbe0a73242fa04a628719b066 (diff) | |
| download | linux-4691ffb18ac908609aab07d13af7995b6b89d33c.tar.xz | |
net: stmmac: fix system hang if change mac address after interface ifdown
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 11 |
1 files changed, 10 insertions, 1 deletions
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; } |