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net: fec: Fix possible NPD in fec_enet_phy_reset_after_clk_enable()

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[ Upstream commit 03e79de4608bdd48ad6eec272e196124cefaf798 ]

The function of_phy_find_device may return NULL, so we need to take
care before dereferencing phy_dev.

Fixes: 64a632da538a ("net: fec: Fix phy_device lookup for phy_reset_after_clk_enable()")
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Cc: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: Richard Leitner <richard.leitner@skidata.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Wei Fang <wei.fang@nxp.com>
Link: https://patch.msgid.link/20250904091334.53965-1-wahrenst@gmx.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Stefan Wahren 2025-09-04 11:13:34 +02:00 • committed by Greg Kroah-Hartman
commit 8c60d12bba
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/freescale/fec_main.c
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@ -2018,7 +2018,8 @@ static void fec_enet_phy_reset_after_clk_enable(struct net_device *ndev)
*/
phy_dev = of_phy_find_device(fep->phy_node);
phy_reset_after_clk_enable(phy_dev);
put_device(&phy_dev->mdio.dev);
if (phy_dev)
put_device(&phy_dev->mdio.dev);
}
}