igb: Fix PPS input and output using 3rd and 4th SDP

Fix handling of the tsync interrupt to compare the pin number with
IGB_N_SDP instead of IGB_N_EXTTS/IGB_N_PEROUT and fix the indexing to
the perout array.

Fixes: cf99c1d ("igb: move PEROUT and EXTTS isr logic to separate functions")
Reported-by: Matt Corallo <[email protected]>
Signed-off-by: Miroslav Lichvar <[email protected]>
Reviewed-by: Jacob Keller <[email protected]>
Tested-by: Gurucharan G <[email protected]> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: mlichvar

drivers/net/ethernet/intel/igb/igb_main.c

@@ -6794,15 +6794,15 @@ static void igb_perout(struct igb_adapter *adapter, int tsintr_tt)
 	struct timespec64 ts;
 	u32 tsauxc;
 
-	if (pin < 0 || pin >= IGB_N_PEROUT)
+	if (pin < 0 || pin >= IGB_N_SDP)
 		return;
 
 	spin_lock(&adapter->tmreg_lock);
 
 	if (hw->mac.type == e1000_82580 ||
 	    hw->mac.type == e1000_i354 ||
 	    hw->mac.type == e1000_i350) {
-		s64 ns = timespec64_to_ns(&adapter->perout[pin].period);
+		s64 ns = timespec64_to_ns(&adapter->perout[tsintr_tt].period);
 		u32 systiml, systimh, level_mask, level, rem;
 		u64 systim, now;
 
@@ -6850,8 +6850,8 @@ static void igb_perout(struct igb_adapter *adapter, int tsintr_tt)
 		ts.tv_nsec = (u32)systim;
 		ts.tv_sec  = ((u32)(systim >> 32)) & 0xFF;
 	} else {
-		ts = timespec64_add(adapter->perout[pin].start,
-				    adapter->perout[pin].period);
+		ts = timespec64_add(adapter->perout[tsintr_tt].start,
+				    adapter->perout[tsintr_tt].period);
 	}
 
 	/* u32 conversion of tv_sec is safe until y2106 */
@@ -6860,7 +6860,7 @@ static void igb_perout(struct igb_adapter *adapter, int tsintr_tt)
 	tsauxc = rd32(E1000_TSAUXC);
 	tsauxc |= TSAUXC_EN_TT0;
 	wr32(E1000_TSAUXC, tsauxc);
-	adapter->perout[pin].start = ts;
+	adapter->perout[tsintr_tt].start = ts;
 
 	spin_unlock(&adapter->tmreg_lock);
 }
@@ -6874,7 +6874,7 @@ static void igb_extts(struct igb_adapter *adapter, int tsintr_tt)
 	struct ptp_clock_event event;
 	struct timespec64 ts;
 
-	if (pin < 0 || pin >= IGB_N_EXTTS)
+	if (pin < 0 || pin >= IGB_N_SDP)
 		return;
 
 	if (hw->mac.type == e1000_82580 ||