[PATCH net-next 1/2] net: stmmac: dwmac-sun8i: Fix the RX_TH threshold encoding

[Arun Iyengar via B4 Relay <devnull+aiyengar1990.gmail.com@kernel.org>]

From: Arun Iyengar <aiyengar1990@gmail.com>

The EMAC RX_CTL1 RX_TH field (bits 5:4) encodes 00 = 64 bytes and
01 = 32 bytes (H616 user manual v1.0, 6.5.10; 10 = 96 and 11 = 128 bytes
as in the driver). The driver has the first two swapped.

The values are only used in RX threshold mode, which dwmac-sun8i never
selects while RX checksum offload is on, so no current configuration is
affected.

Signed-off-by: Arun Iyengar <aiyengar1990@gmail.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
index 47954537b29e..0c82662fbe6e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
@@ -198,8 +198,9 @@ static const struct emac_variant emac_variant_h616_emac1 = {
 /* Used in RX_CTL1*/
 #define EMAC_RX_MD              BIT(1)
 #define EMAC_RX_TH_MASK		GENMASK(5, 4)
-#define EMAC_RX_TH_32		0
-#define EMAC_RX_TH_64		(0x1 << 4)
+/* RX_CTL1 RX_TH encoding (H616 UM 6.5.10): 00 = 64, 01 = 32 bytes */
+#define EMAC_RX_TH_32		(0x1 << 4)
+#define EMAC_RX_TH_64		0
 #define EMAC_RX_TH_96		(0x2 << 4)
 #define EMAC_RX_TH_128		(0x3 << 4)
 #define EMAC_RX_DMA_EN  BIT(30)

-- 
2.55.0