6.6-stable review patch. If anyone has any objections, please let me know.
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From: Horatiu Vultur horatiu.vultur@microchip.com
[ Upstream commit ea5df88aeca112aac69e6c32e3dd1433a113b0c9 ]
The PTP initialization is two-step. First part are the function vsc8584_ptp_probe_once() and vsc8584_ptp_probe() at probe time which initialize the locks, queues, creates the PTP device. The second part is the function vsc8584_ptp_init() at config_init() time which initialize PTP in the HW.
For VSC8574 and VSC8572, the PTP initialization is incomplete. It is missing the first part but it makes the second part. Meaning that the ptp_clock_register() is never called.
There is no crash without the first part when enabling PTP but this is unexpected because some PHys have PTP functionality exposed by the driver and some don't even though they share the same PTP clock PTP.
Fixes: 774626fa440e ("net: phy: mscc: Add PTP support for 2 more VSC PHYs") Reviewed-by: Maxime Chevallier maxime.chevallier@bootlin.com Signed-off-by: Horatiu Vultur horatiu.vultur@microchip.com Link: https://patch.msgid.link/20251023191350.190940-3-horatiu.vultur@microchip.co... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/phy/mscc/mscc_main.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/phy/mscc/mscc_main.c b/drivers/net/phy/mscc/mscc_main.c index 3a932b30f4358..0a4aa8e08827a 100644 --- a/drivers/net/phy/mscc/mscc_main.c +++ b/drivers/net/phy/mscc/mscc_main.c @@ -2595,7 +2595,7 @@ static struct phy_driver vsc85xx_driver[] = { .suspend = &genphy_suspend, .resume = &genphy_resume, .remove = &vsc85xx_remove, - .probe = &vsc8574_probe, + .probe = &vsc8584_probe, .set_wol = &vsc85xx_wol_set, .get_wol = &vsc85xx_wol_get, .get_tunable = &vsc85xx_get_tunable, @@ -2616,12 +2616,12 @@ static struct phy_driver vsc85xx_driver[] = { .config_aneg = &vsc85xx_config_aneg, .aneg_done = &genphy_aneg_done, .read_status = &vsc85xx_read_status, - .handle_interrupt = vsc85xx_handle_interrupt, + .handle_interrupt = vsc8584_handle_interrupt, .config_intr = &vsc85xx_config_intr, .suspend = &genphy_suspend, .resume = &genphy_resume, .remove = &vsc85xx_remove, - .probe = &vsc8574_probe, + .probe = &vsc8584_probe, .set_wol = &vsc85xx_wol_set, .get_wol = &vsc85xx_wol_get, .get_tunable = &vsc85xx_get_tunable,