net: fec: Stop PPS on driver remove

PPS was not stopped in `fec_ptp_stop()`, called when
the adapter was removed. Consequentially, you couldn't
safely reload the driver with the PPS signal on.

Fixes: 32cba57 ("net: fec: introduce fec_ptp_stop and use in probe fail path")
Reviewed-by: Fabio Estevam <[email protected]>
Link: https://lore.kernel.org/netdev/CAOMZO5BzcZR8PwKKwBssQq_wAGzVgf1ffwe_nhpQJjviTdxy-w@mail.gmail.com/T/#m01dcb810bfc451a492140f6797ca77443d0cb79f
Signed-off-by: Csókás, Bence <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Reviewed-by: Frank Li <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: Csókás, Bence

drivers/net/ethernet/freescale/fec_ptp.c

@@ -775,6 +775,9 @@ void fec_ptp_stop(struct platform_device *pdev)
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct fec_enet_private *fep = netdev_priv(ndev);
 
+	if (fep->pps_enable)
+		fec_ptp_enable_pps(fep, 0);
+
 	cancel_delayed_work_sync(&fep->time_keep);
 	hrtimer_cancel(&fep->perout_timer);
 	if (fep->ptp_clock)