---

yaml --- r: 351454 b: refs/heads/master c: 428f1f7 h: refs/heads/master v: v3
git-mirror · Jan 18, 2013 · 42745f7 · 42745f7
1 parent cf92026
commit 42745f7
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Showing 5 changed files with 15 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b66e2397cd277cf2bec2628b3ed35865df2609e5
+refs/heads/master: 428f1f715131ea5ae32e29502541ce007f556b5b
diff --git a/trunk/drivers/net/ethernet/intel/igb/igb.h b/trunk/drivers/net/ethernet/intel/igb/igb.h
@@ -414,9 +414,11 @@ struct igb_adapter {
 	struct delayed_work ptp_overflow_work;
 	struct work_struct ptp_tx_work;
 	struct sk_buff *ptp_tx_skb;
+	unsigned long ptp_tx_start;
 	spinlock_t tmreg_lock;
 	struct cyclecounter cc;
 	struct timecounter tc;
+	u32 tx_hwtstamp_timeouts;
 
 	char fw_version[32];
 #ifdef CONFIG_IGB_HWMON

diff --git a/trunk/drivers/net/ethernet/intel/igb/igb_ethtool.c b/trunk/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -92,6 +92,7 @@ static const struct igb_stats igb_gstrings_stats[] = {
 	IGB_STAT("os2bmc_tx_by_bmc", stats.b2ospc),
 	IGB_STAT("os2bmc_tx_by_host", stats.o2bspc),
 	IGB_STAT("os2bmc_rx_by_host", stats.b2ogprc),
+	IGB_STAT("tx_hwtstamp_timeouts", tx_hwtstamp_timeouts),
 };
 
 #define IGB_NETDEV_STAT(_net_stat) { \

diff --git a/trunk/drivers/net/ethernet/intel/igb/igb_main.c b/trunk/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4618,6 +4618,7 @@ netdev_tx_t igb_xmit_frame_ring(struct sk_buff *skb,
 		tx_flags |= IGB_TX_FLAGS_TSTAMP;
 
 		adapter->ptp_tx_skb = skb_get(skb);
+		adapter->ptp_tx_start = jiffies;
 		if (adapter->hw.mac.type == e1000_82576)
 			schedule_work(&adapter->ptp_tx_work);
 	}

diff --git a/trunk/drivers/net/ethernet/intel/igb/igb_ptp.c b/trunk/drivers/net/ethernet/intel/igb/igb_ptp.c
@@ -70,6 +70,7 @@
  */
 
 #define IGB_SYSTIM_OVERFLOW_PERIOD	(HZ * 60 * 9)
+#define IGB_PTP_TX_TIMEOUT		(HZ * 15)
 #define INCPERIOD_82576			(1 << E1000_TIMINCA_16NS_SHIFT)
 #define INCVALUE_82576_MASK		((1 << E1000_TIMINCA_16NS_SHIFT) - 1)
 #define INCVALUE_82576			(16 << IGB_82576_TSYNC_SHIFT)
@@ -396,6 +397,15 @@ void igb_ptp_tx_work(struct work_struct *work)
 	if (!adapter->ptp_tx_skb)
 		return;
 
+	if (time_is_before_jiffies(adapter->ptp_tx_start +
+				   IGB_PTP_TX_TIMEOUT)) {
+		dev_kfree_skb_any(adapter->ptp_tx_skb);
+		adapter->ptp_tx_skb = NULL;
+		adapter->tx_hwtstamp_timeouts++;
+		dev_warn(&adapter->pdev->dev, "clearing Tx timestamp hang");
+		return;
+	}
+
 	tsynctxctl = rd32(E1000_TSYNCTXCTL);
 	if (tsynctxctl & E1000_TSYNCTXCTL_VALID)
 		igb_ptp_tx_hwtstamp(adapter);