5.4-stable review patch. If anyone has any objections, please let me know.
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From: Stefan Wahren wahrenst@gmx.net
[ 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 --- drivers/net/ethernet/freescale/fec_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index f8a0966332805..7b2ab0cc562cc 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -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); } }