Merge tag 'v4.4.177' into toradex_vf_4.4-nextColibri-VF_LXDE-Image_2.8b6.183-20190331

This is the 4.4.177 stable release

1 files changed, 10 insertions, 3 deletions

diff --git a/drivers/net/ethernet/intel/e1000e/ptp.c b/drivers/net/ethernet/intel/e1000e/ptp.c
index 25a0ad5102d6..855cf8c15c8a 100644
--- a/drivers/net/ethernet/intel/e1000e/ptp.c
+++ b/drivers/net/ethernet/intel/e1000e/ptp.c
@@ -111,10 +111,14 @@ static int e1000e_phc_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
 	struct e1000_adapter *adapter = container_of(ptp, struct e1000_adapter,
 						     ptp_clock_info);
 	unsigned long flags;
-	u64 ns;
+	u64 cycles, ns;
 
 	spin_lock_irqsave(&adapter->systim_lock, flags);
-	ns = timecounter_read(&adapter->tc);
+
+	/* Use timecounter_cyc2time() to allow non-monotonic SYSTIM readings */
+	cycles = adapter->cc.read(&adapter->cc);
+	ns = timecounter_cyc2time(&adapter->tc, cycles);
+
 	spin_unlock_irqrestore(&adapter->systim_lock, flags);
 
 	*ts = ns_to_timespec64(ns);
@@ -170,9 +174,12 @@ static void e1000e_systim_overflow_work(struct work_struct *work)
 						     systim_overflow_work.work);
 	struct e1000_hw *hw = &adapter->hw;
 	struct timespec64 ts;
+	u64 ns;
 
-	adapter->ptp_clock_info.gettime64(&adapter->ptp_clock_info, &ts);
+	/* Update the timecounter */
+	ns = timecounter_read(&adapter->tc);
 
+	ts = ns_to_timespec64(ns);
 	e_dbg("SYSTIM overflow check at %lld.%09lu\n",
 	      (long long) ts.tv_sec, ts.tv_nsec);