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85 lines
2.7 KiB
Diff
85 lines
2.7 KiB
Diff
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From 474a31e13a4e9749fb3ee55794d69d0f17ee0998 Mon Sep 17 00:00:00 2001
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From: Aaro Koskinen <aaro.koskinen@nokia.com>
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Date: Wed, 26 Feb 2020 18:49:01 +0200
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Subject: net: stmmac: fix notifier registration
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We cannot register the same netdev notifier multiple times when probing
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stmmac devices. Register the notifier only once in module init, and also
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make debugfs creation/deletion safe against simultaneous notifier call.
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Fixes: 481a7d154cbb ("stmmac: debugfs entry name is not be changed when udev rename device name.")
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Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 13 ++++++++-----
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1 file changed, 8 insertions(+), 5 deletions(-)
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(limited to 'drivers/net/ethernet/stmicro/stmmac')
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diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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index 5836b21edd7e..7da18c9afa01 100644
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--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@@ -4405,6 +4405,8 @@ static void stmmac_init_fs(struct net_device *dev)
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{
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struct stmmac_priv *priv = netdev_priv(dev);
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+ rtnl_lock();
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+
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/* Create per netdev entries */
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priv->dbgfs_dir = debugfs_create_dir(dev->name, stmmac_fs_dir);
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@@ -4416,14 +4418,13 @@ static void stmmac_init_fs(struct net_device *dev)
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debugfs_create_file("dma_cap", 0444, priv->dbgfs_dir, dev,
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&stmmac_dma_cap_fops);
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- register_netdevice_notifier(&stmmac_notifier);
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+ rtnl_unlock();
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}
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static void stmmac_exit_fs(struct net_device *dev)
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{
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struct stmmac_priv *priv = netdev_priv(dev);
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- unregister_netdevice_notifier(&stmmac_notifier);
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debugfs_remove_recursive(priv->dbgfs_dir);
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}
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#endif /* CONFIG_DEBUG_FS */
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@@ -4940,14 +4941,14 @@ int stmmac_dvr_remove(struct device *dev)
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netdev_info(priv->dev, "%s: removing driver", __func__);
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-#ifdef CONFIG_DEBUG_FS
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- stmmac_exit_fs(ndev);
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-#endif
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stmmac_stop_all_dma(priv);
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stmmac_mac_set(priv, priv->ioaddr, false);
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netif_carrier_off(ndev);
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unregister_netdev(ndev);
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+#ifdef CONFIG_DEBUG_FS
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+ stmmac_exit_fs(ndev);
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+#endif
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phylink_destroy(priv->phylink);
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if (priv->plat->stmmac_rst)
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reset_control_assert(priv->plat->stmmac_rst);
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@@ -5166,6 +5167,7 @@ static int __init stmmac_init(void)
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/* Create debugfs main directory if it doesn't exist yet */
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if (!stmmac_fs_dir)
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stmmac_fs_dir = debugfs_create_dir(STMMAC_RESOURCE_NAME, NULL);
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+ register_netdevice_notifier(&stmmac_notifier);
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#endif
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return 0;
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@@ -5174,6 +5176,7 @@ static int __init stmmac_init(void)
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static void __exit stmmac_exit(void)
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{
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#ifdef CONFIG_DEBUG_FS
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+ unregister_netdevice_notifier(&stmmac_notifier);
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debugfs_remove_recursive(stmmac_fs_dir);
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#endif
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}
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--
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cgit 1.2-0.3.lf.el7
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