net: fec: cancel perout_timer when PEROUT is disabled

The PEROUT allows the user to set a specified future time to output the
periodic signal. If the future time is far from the current time, the FEC
driver will use hrtimer to configure PEROUT one second before the future
time. However, the hrtimer will not be canceled if the PEROUT is disabled
before the hrtimer expires. So the PEROUT will be configured when the
hrtimer expires, which is not as expected. Therefore, cancel the hrtimer
in fec_ptp_pps_disable() to fix this issue.

Fixes: 350749b ("net: fec: Add support for periodic output signal of PPS")
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Link: https://patch.msgid.link/20251125085210.1094306-2-wei.fang@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: WeiFang-NXP

drivers/net/ethernet/freescale/fec_ptp.c

@@ -497,6 +497,8 @@ static int fec_ptp_pps_disable(struct fec_enet_private *fep, uint channel)
 {
 	unsigned long flags;
 
+	hrtimer_cancel(&fep->perout_timer);
+
 	spin_lock_irqsave(&fep->tmreg_lock, flags);
 	writel(0, fep->hwp + FEC_TCSR(channel));
 	spin_unlock_irqrestore(&fep->tmreg_lock, flags);