ice: Skip PTP HW writes during PTP reset procedure

Block HW write access for the driver while the device is in reset to
avoid potential race condition and access to the PTP HW in
non-nominal state which could lead to undesired effects

Fixes: 4aad533 ("ice: add individual interrupt allocation")
Signed-off-by: Grzegorz Nitka <[email protected]>
Co-developed-by: Karol Kolacinski <[email protected]>
Signed-off-by: Karol Kolacinski <[email protected]>
Signed-off-by: Sergey Temerkhanov <[email protected]>
Reviewed-by: Przemek Kitszel <[email protected]>
Tested-by: Pucha Himasekhar Reddy <[email protected]> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <[email protected]>

Author: gnitka

drivers/net/ethernet/intel/ice/ice_ptp.c

@@ -1477,6 +1477,10 @@ void ice_ptp_link_change(struct ice_pf *pf, u8 port, bool linkup)
 	/* Update cached link status for this port immediately */
 	ptp_port->link_up = linkup;
 
+	/* Skip HW writes if reset is in progress */
+	if (pf->hw.reset_ongoing)
+		return;
+
 	switch (hw->ptp.phy_model) {
 	case ICE_PHY_E810:
 		/* Do not reconfigure E810 PHY */