i40e: remove ptp_tx_work timestamp work item

This patch removes the unnecessary ptp_tx_work item. It conflicts with
the interrupt-based handler, and will cause spurious warning messages to
be displayed in the kernel log. Since the hardware can properly trigger
an interrupt, we do not need to poll for an available timestamp in a
work queue any more.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 36 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_ptp.c b/drivers/net/ethernet/intel/i40e/i40e_ptp.c
index e61e63720800..1fedc7a1589d 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ptp.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ptp.c
@@ -217,40 +217,6 @@ static int i40e_ptp_settime(struct ptp_clock_info *ptp,
 }
 
 /**
- * i40e_ptp_tx_work
- * @work: pointer to work struct
- *
- * This work function polls the PRTTSYN_STAT_0.TXTIME bit to determine when a
- * Tx timestamp event has occurred, in order to pass the Tx timestamp value up
- * the stack in the skb.
- */
-static void i40e_ptp_tx_work(struct work_struct *work)
-{
-	struct i40e_pf *pf = container_of(work, struct i40e_pf,
-					  ptp_tx_work);
-	struct i40e_hw *hw = &pf->hw;
-	u32 prttsyn_stat_0;
-
-	if (!pf->ptp_tx_skb)
-		return;
-
-	if (time_is_before_jiffies(pf->ptp_tx_start +
-				   I40E_PTP_TX_TIMEOUT)) {
-		dev_kfree_skb_any(pf->ptp_tx_skb);
-		pf->ptp_tx_skb = NULL;
-		pf->tx_hwtstamp_timeouts++;
-		dev_warn(&pf->pdev->dev, "clearing Tx timestamp hang\n");
-		return;
-	}
-
-	prttsyn_stat_0 = rd32(hw, I40E_PRTTSYN_STAT_0);
-	if (prttsyn_stat_0 & I40E_PRTTSYN_STAT_0_TXTIME_MASK)
-		i40e_ptp_tx_hwtstamp(pf);
-	else
-		schedule_work(&pf->ptp_tx_work);
-}
-
-/**
  * i40e_ptp_enable - Enable/disable ancillary features of the PHC subsystem
  * @ptp: The PTP clock structure
  * @rq: The requested feature to change
@@ -608,7 +574,6 @@ void i40e_ptp_init(struct i40e_pf *pf)
 		u32 regval;
 
 		spin_lock_init(&pf->tmreg_lock);
-		INIT_WORK(&pf->ptp_tx_work, i40e_ptp_tx_work);
 
 		dev_info(&pf->pdev->dev, "%s: added PHC on %s\n", __func__,
 			 netdev->name);
@@ -647,7 +612,6 @@ void i40e_ptp_stop(struct i40e_pf *pf)
 	pf->ptp_tx = false;
 	pf->ptp_rx = false;
 
-	cancel_work_sync(&pf->ptp_tx_work);
 	if (pf->ptp_tx_skb) {
 		dev_kfree_skb_any(pf->ptp_tx_skb);
 		pf->ptp_tx_skb = NULL;