[PATCH v4 03/16] net/txgbe: fix e56 PHY configuration error

The e56 PHY RXS ring equalizer/tap configuration is written to the
wrong bit field: set_fields_e56(&rdata, 9, 4, 0x366) targets the
unrelated lower bits, so the configured tap values are never applied
and the equalizer stays at its default setting, which can degrade
the received signal on both the 40G and 10G paths.

Fix the field range to (21, 12), so the equalizer/tap configuration
takes effect.

Fixes: f7cfc21e9f75 ("net/txgbe: fix link stability for 40G NIC")
Cc: stable@dpdk.org

Signed-off-by: Zaiyu Wang <redacted>
---
 drivers/net/txgbe/base/txgbe_e56.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/txgbe/base/txgbe_e56.c b/drivers/net/txgbe/base/txgbe_e56.c
index cbcc05333e..2711863f2c 100644
--- a/drivers/net/txgbe/base/txgbe_e56.c
+++ b/drivers/net/txgbe/base/txgbe_e56.c

@@ -423,7 +423,7 @@ u32 txgbe_e56_cfg_40g(struct txgbe_hw *hw)
 
 		addr  = E56PHY_RXS_RINGO_0_ADDR + (E56PHY_RXS_OFFSET * i);
 		rdata = rd32_ephy(hw, addr);
-		set_fields_e56(&rdata, 9, 4, 0x366);
+		set_fields_e56(&rdata, 21, 12, 0x366);
 		wr32_ephy(hw, addr, rdata);
 	}
 

-- 
2.55.0.windows.2