From: Wei Fang Date: Tue, 8 Oct 2024 06:11:53 +0000 (+0800) Subject: net: fec: don't save PTP state if PTP is unsupported X-Git-Tag: v6.12-rc3~22^2~12 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=6be063071a457767ee229db13f019c2ec03bfe44;p=linux-block.git net: fec: don't save PTP state if PTP is unsupported Some platforms (such as i.MX25 and i.MX27) do not support PTP, so on these platforms fec_ptp_init() is not called and the related members in fep are not initialized. However, fec_ptp_save_state() is called unconditionally, which causes the kernel to panic. Therefore, add a condition so that fec_ptp_save_state() is not called if PTP is not supported. Fixes: a1477dc87dc4 ("net: fec: Restart PPS after link state change") Reported-by: Guenter Roeck Closes: https://lore.kernel.org/lkml/353e41fe-6bb4-4ee9-9980-2da2a9c1c508@roeck-us.net/ Signed-off-by: Wei Fang Reviewed-by: Csókás, Bence Reviewed-by: Simon Horman Tested-by: Guenter Roeck Link: https://patch.msgid.link/20241008061153.1977930-1-wei.fang@nxp.com Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index 31ebf6a4f973..9d9fcec41488 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -1077,7 +1077,8 @@ fec_restart(struct net_device *ndev) u32 rcntl = OPT_FRAME_SIZE | 0x04; u32 ecntl = FEC_ECR_ETHEREN; - fec_ptp_save_state(fep); + if (fep->bufdesc_ex) + fec_ptp_save_state(fep); /* Whack a reset. We should wait for this. * For i.MX6SX SOC, enet use AXI bus, we use disable MAC @@ -1340,7 +1341,8 @@ fec_stop(struct net_device *ndev) netdev_err(ndev, "Graceful transmit stop did not complete!\n"); } - fec_ptp_save_state(fep); + if (fep->bufdesc_ex) + fec_ptp_save_state(fep); /* Whack a reset. We should wait for this. * For i.MX6SX SOC, enet use AXI bus, we use disable MAC