netdev - [PATCH net-next v2 15/15] ice: reschedule ice_ptp_wait_for_offset

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Message-Id: <20221207210937.1099650-16-anthony.l.nguyen@intel.com>
Date:   Wed,  7 Dec 2022 13:09:37 -0800
From:   Tony Nguyen <anthony.l.nguyen@...el.com>
To:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com
Cc:     Jacob Keller <jacob.e.keller@...el.com>, netdev@...r.kernel.org,
        anthony.l.nguyen@...el.com, richardcochran@...il.com,
        leon@...nel.org, Siddaraju DH <siddaraju.dh@...el.com>,
        Gurucharan G <gurucharanx.g@...el.com>
Subject: [PATCH net-next v2 15/15] ice: reschedule ice_ptp_wait_for_offset_valid during reset

From: Jacob Keller <jacob.e.keller@...el.com>

If the ice_ptp_wait_for_offest_valid function is scheduled to run while the
driver is resetting, it will exit without completing calibration. The work
function gets scheduled by ice_ptp_port_phy_restart which will be called as
part of the reset recovery process.

It is possible for the first execution to occur before the driver has
completely cleared its resetting flags. Ensure calibration completes by
rescheduling the task until reset is fully completed.

Reported-by: Siddaraju DH <siddaraju.dh@...el.com>
Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
Tested-by: Gurucharan G <gurucharanx.g@...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 | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
index b1cc1f45e419..bd6fe25321bd 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -1245,8 +1245,13 @@ static void ice_ptp_wait_for_offsets(struct kthread_work *work)
 	pf = ptp_port_to_pf(port);
 	hw = &pf->hw;
 
-	if (ice_is_reset_in_progress(pf->state))
+	if (ice_is_reset_in_progress(pf->state)) {
+		/* wait for device driver to complete reset */
+		kthread_queue_delayed_work(pf->ptp.kworker,
+					   &port->ov_work,
+					   msecs_to_jiffies(100));
 		return;
+	}
 
 	tx_err = ice_ptp_check_tx_fifo(port);
 	if (!tx_err)
-- 
2.35.1