igc: Fix typo in i225 LTR functions

[ Upstream commit 0182d1f ]

The LTR maximum value was incorrectly written using the scale from
the LTR minimum value. This would cause incorrect values to be sent,
in cases where the initial calculation lead to different min/max scales.

Fixes: 707abf0 ("igc: Add initial LTR support")
Suggested-by: Dima Ruinskiy <dima.ruinskiy@intel.com>
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Nechama Kraus <nechamax.kraus@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/net/ethernet/intel/igc/igc_i225.c

@@ -636,7 +636,7 @@ s32 igc_set_ltr_i225(struct igc_hw *hw, bool link)
 		ltrv = rd32(IGC_LTRMAXV);
 		if (ltr_max != (ltrv & IGC_LTRMAXV_LTRV_MASK)) {
 			ltrv = IGC_LTRMAXV_LSNP_REQ | ltr_max |
-			       (scale_min << IGC_LTRMAXV_SCALE_SHIFT);
+			       (scale_max << IGC_LTRMAXV_SCALE_SHIFT);
 			wr32(IGC_LTRMAXV, ltrv);
 		}
 	}