The rcu_read_lock() has been introduced in __ethtool_get_ts_info() since the commit 4c61d809cf60 ("net: ethtool: Fix suspicious rcu_dereference usage"). Therefore, the device drivers cannot use any sleeping functions when implementing the callback of ethtool_ops::get_ts_info(). Currently, pci_get_slot() is used in enetc_get_ts_info(), but it calls down_read() which might sleep, so this is a potential issue. Therefore, to fix this issue, pci_get_domain_bus_and_slot() is used to replace pci_get_slot() in enetc_get_ts_info(). Reported-by: Vladimir Oltean Closes: https://lore.kernel.org/netdev/20250918124823.t3xlzn7w2glzkhnx@skbuf/ Fixes: f5b9a1cde0a2 ("net: enetc: add PTP synchronization support for ENETC v4") Signed-off-by: Wei Fang --- drivers/net/ethernet/freescale/enetc/enetc_ethtool.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c index 6215e9c68fc5..445bfd032e0f 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c +++ b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c @@ -895,7 +895,8 @@ static int enetc4_get_phc_index_by_pdev(struct enetc_si *si) return -1; } - timer_pdev = pci_get_slot(bus, devfn); + timer_pdev = pci_get_domain_bus_and_slot(pci_domain_nr(bus), + bus->number, devfn); if (!timer_pdev) return -1; -- 2.34.1