netdev - [PATCH net-next 14/14] ice: reschedule ice_ptp_wait_for_offset

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Message-Id: <20221130194330.3257836-15-anthony.l.nguyen@intel.com>
Date:   Wed, 30 Nov 2022 11:43:30 -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,
        Siddaraju DH <siddaraju.dh@...el.com>,
        Gurucharan G <gurucharanx.g@...el.com>
Subject: [PATCH net-next 14/14] 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 bb3f5f952667..4b43d6f6279a 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -1265,8 +1265,13 @@ 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