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Message-ID: <20240807224521.3819189-3-anthony.l.nguyen@intel.com>
Date: Wed, 7 Aug 2024 15:45:19 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
kuba@...nel.org,
pabeni@...hat.com,
edumazet@...gle.com,
netdev@...r.kernel.org
Cc: Grzegorz Nitka <grzegorz.nitka@...el.com>,
anthony.l.nguyen@...el.com,
richardcochran@...il.com,
horms@...nel.org,
Karol Kolacinski <karol.kolacinski@...el.com>,
Sergey Temerkhanov <sergey.temerkhanov@...el.com>,
Przemek Kitszel <przemyslaw.kitszel@...el.com>,
Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com>
Subject: [PATCH net 2/3] ice: Skip PTP HW writes during PTP reset procedure
From: Grzegorz Nitka <grzegorz.nitka@...el.com>
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: 4aad5335969f ("ice: add individual interrupt allocation")
Signed-off-by: Grzegorz Nitka <grzegorz.nitka@...el.com>
Co-developed-by: Karol Kolacinski <karol.kolacinski@...el.com>
Signed-off-by: Karol Kolacinski <karol.kolacinski@...el.com>
Signed-off-by: Sergey Temerkhanov <sergey.temerkhanov@...el.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
drivers/net/ethernet/intel/ice/ice_ptp.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
index e2786cc13286..ef2e858f49bb 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/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 */
--
2.42.0
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