net: phy: phy drivers should not set SUPPORTED_[Asym_]Pause

Instead of having individual PHY drivers set the SUPPORTED_Pause and
SUPPORTED_Asym_Pause flags, phylib itself should set those flags,
unless there is a hardware erratum or other special case.  During
autonegotiation, the PHYs will determine whether to enable pause
frame support.

Pause frames are a feature that is supported by the MAC.  It is the MAC
that generates the frames and that processes them.  The PHY can only be
configured to allow them to pass through.

This commit also effectively reverts the recently applied c7a61319
("net: phy: dp83848: Support ethernet pause frames").

So the new process is:

1) Unless the PHY driver overrides it, phylib sets the SUPPORTED_Pause
and SUPPORTED_AsymPause bits in phydev->supported.  This indicates that
the PHY supports pause frames.

2) The MAC driver checks phydev->supported before it calls phy_start().
If (SUPPORTED_Pause | SUPPORTED_AsymPause) is set, then the MAC driver
sets those bits in phydev->advertising, if it wants to enable pause
frame support.

3) When the link state changes, the MAC driver checks phydev->pause and
phydev->asym_pause,  If the bits are set, then it enables the corresponding
features in the MAC.  The algorithm is:

	if (phydev->pause)
		The MAC should be programmed to receive and honor
                pause frames it receives, i.e. enable receive flow control.

	if (phydev->pause != phydev->asym_pause)
		The MAC should be programmed to transmit pause
		frames when needed, i.e. enable transmit flow control.

Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/bcm-cygnus.c

@@ -134,8 +134,7 @@ static struct phy_driver bcm_cygnus_phy_driver[] = {
 	.phy_id        = PHY_ID_BCM_CYGNUS,
 	.phy_id_mask   = 0xfffffff0,
 	.name          = "Broadcom Cygnus PHY",
-	.features      = PHY_GBIT_FEATURES |
-			SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features      = PHY_GBIT_FEATURES,
 	.config_init   = bcm_cygnus_config_init,
 	.config_aneg   = genphy_config_aneg,
 	.read_status   = genphy_read_status,

drivers/net/phy/bcm7xxx.c

@@ -386,8 +386,7 @@ static int bcm7xxx_28nm_probe(struct phy_device *phydev)
 	.phy_id		= (_oui),					\
 	.phy_id_mask	= 0xfffffff0,					\
 	.name		= _name,					\
-	.features	= PHY_GBIT_FEATURES |				\
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,	\
+	.features	= PHY_GBIT_FEATURES,				\
 	.flags		= PHY_IS_INTERNAL,				\
 	.config_init	= bcm7xxx_28nm_config_init,			\
 	.config_aneg	= genphy_config_aneg,				\
@@ -406,8 +405,7 @@ static int bcm7xxx_28nm_probe(struct phy_device *phydev)
 	.phy_id         = (_oui),					\
 	.phy_id_mask    = 0xfffffff0,					\
 	.name           = _name,					\
-	.features       = PHY_BASIC_FEATURES |				\
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,	\
+	.features       = PHY_BASIC_FEATURES,				\
 	.flags          = PHY_IS_INTERNAL,				\
 	.config_init    = bcm7xxx_config_init,				\
 	.config_aneg    = genphy_config_aneg,				\

drivers/net/phy/broadcom.c

@@ -525,8 +525,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM5411,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM5411",
-	.features	= PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= bcm54xx_config_init,
 	.config_aneg	= genphy_config_aneg,
@@ -537,8 +536,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM5421,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM5421",
-	.features	= PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= bcm54xx_config_init,
 	.config_aneg	= genphy_config_aneg,
@@ -549,8 +547,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM5461,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM5461",
-	.features	= PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= bcm54xx_config_init,
 	.config_aneg	= genphy_config_aneg,
@@ -561,8 +558,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM54612E,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM54612E",
-	.features	= PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= bcm54xx_config_init,
 	.config_aneg	= bcm54612e_config_aneg,
@@ -573,8 +569,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM54616S,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM54616S",
-	.features	= PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= bcm54xx_config_init,
 	.config_aneg	= genphy_config_aneg,
@@ -585,8 +580,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM5464,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM5464",
-	.features	= PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= bcm54xx_config_init,
 	.config_aneg	= genphy_config_aneg,
@@ -597,8 +591,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM5481,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM5481",
-	.features	= PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= bcm54xx_config_init,
 	.config_aneg	= bcm5481_config_aneg,
@@ -609,8 +602,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id         = PHY_ID_BCM54810,
 	.phy_id_mask    = 0xfffffff0,
 	.name           = "Broadcom BCM54810",
-	.features       = PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features       = PHY_GBIT_FEATURES,
 	.flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init    = bcm54xx_config_init,
 	.config_aneg    = bcm5481_config_aneg,
@@ -621,8 +613,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM5482,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM5482",
-	.features	= PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= bcm5482_config_init,
 	.config_aneg	= genphy_config_aneg,
@@ -633,8 +624,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM50610,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM50610",
-	.features	= PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= bcm54xx_config_init,
 	.config_aneg	= genphy_config_aneg,
@@ -645,8 +635,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM50610M,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM50610M",
-	.features	= PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= bcm54xx_config_init,
 	.config_aneg	= genphy_config_aneg,
@@ -657,8 +646,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM57780,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM57780",
-	.features	= PHY_GBIT_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= bcm54xx_config_init,
 	.config_aneg	= genphy_config_aneg,
@@ -669,8 +657,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCMAC131,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCMAC131",
-	.features	= PHY_BASIC_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= brcm_fet_config_init,
 	.config_aneg	= genphy_config_aneg,
@@ -681,8 +668,7 @@ static struct phy_driver broadcom_drivers[] = {
 	.phy_id		= PHY_ID_BCM5241,
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Broadcom BCM5241",
-	.features	= PHY_BASIC_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= brcm_fet_config_init,
 	.config_aneg	= genphy_config_aneg,

drivers/net/phy/dp83848.c

@@ -88,9 +88,7 @@ MODULE_DEVICE_TABLE(mdio, dp83848_tbl);
 		.phy_id		= _id,				\
 		.phy_id_mask	= 0xfffffff0,			\
 		.name		= _name,			\
-		.features	= (PHY_BASIC_FEATURES |		\
-				   SUPPORTED_Pause |		\
-				   SUPPORTED_Asym_Pause),	\
+		.features	= PHY_BASIC_FEATURES,		\
 		.flags		= PHY_HAS_INTERRUPT,		\
 								\
 		.soft_reset	= genphy_soft_reset,		\

drivers/net/phy/icplus.c

@@ -225,8 +225,7 @@ static struct phy_driver icplus_driver[] = {
 	.phy_id		= 0x02430d90,
 	.name		= "ICPlus IP1001",
 	.phy_id_mask	= 0x0ffffff0,
-	.features	= PHY_GBIT_FEATURES | SUPPORTED_Pause |
-			  SUPPORTED_Asym_Pause,
+	.features	= PHY_GBIT_FEATURES,
 	.config_init	= &ip1001_config_init,
 	.config_aneg	= &genphy_config_aneg,
 	.read_status	= &genphy_read_status,
@@ -236,8 +235,7 @@ static struct phy_driver icplus_driver[] = {
 	.phy_id		= 0x02430c54,
 	.name		= "ICPlus IP101A/G",
 	.phy_id_mask	= 0x0ffffff0,
-	.features	= PHY_BASIC_FEATURES | SUPPORTED_Pause |
-			  SUPPORTED_Asym_Pause,
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT,
 	.ack_interrupt	= ip101a_g_ack_interrupt,
 	.config_init	= &ip101a_g_config_init,

drivers/net/phy/intel-xway.c

@@ -239,8 +239,7 @@ static struct phy_driver xway_gphy[] = {
 		.phy_id		= PHY_ID_PHY11G_1_3,
 		.phy_id_mask	= 0xffffffff,
 		.name		= "Intel XWAY PHY11G (PEF 7071/PEF 7072) v1.3",
-		.features	= (PHY_GBIT_FEATURES | SUPPORTED_Pause |
-				   SUPPORTED_Asym_Pause),
+		.features	= PHY_GBIT_FEATURES,
 		.flags		= PHY_HAS_INTERRUPT,
 		.config_init	= xway_gphy_config_init,
 		.config_aneg	= xway_gphy14_config_aneg,
@@ -254,8 +253,7 @@ static struct phy_driver xway_gphy[] = {
 		.phy_id		= PHY_ID_PHY22F_1_3,
 		.phy_id_mask	= 0xffffffff,
 		.name		= "Intel XWAY PHY22F (PEF 7061) v1.3",
-		.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
-				   SUPPORTED_Asym_Pause),
+		.features	= PHY_BASIC_FEATURES,
 		.flags		= PHY_HAS_INTERRUPT,
 		.config_init	= xway_gphy_config_init,
 		.config_aneg	= xway_gphy14_config_aneg,
@@ -269,8 +267,7 @@ static struct phy_driver xway_gphy[] = {
 		.phy_id		= PHY_ID_PHY11G_1_4,
 		.phy_id_mask	= 0xffffffff,
 		.name		= "Intel XWAY PHY11G (PEF 7071/PEF 7072) v1.4",
-		.features	= (PHY_GBIT_FEATURES | SUPPORTED_Pause |
-				   SUPPORTED_Asym_Pause),
+		.features	= PHY_GBIT_FEATURES,
 		.flags		= PHY_HAS_INTERRUPT,
 		.config_init	= xway_gphy_config_init,
 		.config_aneg	= xway_gphy14_config_aneg,
@@ -284,8 +281,7 @@ static struct phy_driver xway_gphy[] = {
 		.phy_id		= PHY_ID_PHY22F_1_4,
 		.phy_id_mask	= 0xffffffff,
 		.name		= "Intel XWAY PHY22F (PEF 7061) v1.4",
-		.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
-				   SUPPORTED_Asym_Pause),
+		.features	= PHY_BASIC_FEATURES,
 		.flags		= PHY_HAS_INTERRUPT,
 		.config_init	= xway_gphy_config_init,
 		.config_aneg	= xway_gphy14_config_aneg,
@@ -299,8 +295,7 @@ static struct phy_driver xway_gphy[] = {
 		.phy_id		= PHY_ID_PHY11G_1_5,
 		.phy_id_mask	= 0xffffffff,
 		.name		= "Intel XWAY PHY11G (PEF 7071/PEF 7072) v1.5 / v1.6",
-		.features	= (PHY_GBIT_FEATURES | SUPPORTED_Pause |
-				   SUPPORTED_Asym_Pause),
+		.features	= PHY_GBIT_FEATURES,
 		.flags		= PHY_HAS_INTERRUPT,
 		.config_init	= xway_gphy_config_init,
 		.config_aneg	= genphy_config_aneg,
@@ -314,8 +309,7 @@ static struct phy_driver xway_gphy[] = {
 		.phy_id		= PHY_ID_PHY22F_1_5,
 		.phy_id_mask	= 0xffffffff,
 		.name		= "Intel XWAY PHY22F (PEF 7061) v1.5 / v1.6",
-		.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
-				   SUPPORTED_Asym_Pause),
+		.features	= PHY_BASIC_FEATURES,
 		.flags		= PHY_HAS_INTERRUPT,
 		.config_init	= xway_gphy_config_init,
 		.config_aneg	= genphy_config_aneg,
@@ -329,8 +323,7 @@ static struct phy_driver xway_gphy[] = {
 		.phy_id		= PHY_ID_PHY11G_VR9,
 		.phy_id_mask	= 0xffffffff,
 		.name		= "Intel XWAY PHY11G (xRX integrated)",
-		.features	= (PHY_GBIT_FEATURES | SUPPORTED_Pause |
-				   SUPPORTED_Asym_Pause),
+		.features	= PHY_GBIT_FEATURES,
 		.flags		= PHY_HAS_INTERRUPT,
 		.config_init	= xway_gphy_config_init,
 		.config_aneg	= genphy_config_aneg,
@@ -344,8 +337,7 @@ static struct phy_driver xway_gphy[] = {
 		.phy_id		= PHY_ID_PHY22F_VR9,
 		.phy_id_mask	= 0xffffffff,
 		.name		= "Intel XWAY PHY22F (xRX integrated)",
-		.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
-				   SUPPORTED_Asym_Pause),
+		.features	= PHY_BASIC_FEATURES,
 		.flags		= PHY_HAS_INTERRUPT,
 		.config_init	= xway_gphy_config_init,
 		.config_aneg	= genphy_config_aneg,

drivers/net/phy/micrel.c

@@ -790,7 +790,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KS8737,
 	.phy_id_mask	= MICREL_PHY_ID_MASK,
 	.name		= "Micrel KS8737",
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.driver_data	= &ks8737_type,
 	.config_init	= kszphy_config_init,
@@ -807,8 +807,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ8021,
 	.phy_id_mask	= 0x00ffffff,
 	.name		= "Micrel KSZ8021 or KSZ8031",
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
-			   SUPPORTED_Asym_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.driver_data	= &ksz8021_type,
 	.probe		= kszphy_probe,
@@ -826,8 +825,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ8031,
 	.phy_id_mask	= 0x00ffffff,
 	.name		= "Micrel KSZ8031",
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
-			   SUPPORTED_Asym_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.driver_data	= &ksz8021_type,
 	.probe		= kszphy_probe,
@@ -845,8 +843,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ8041,
 	.phy_id_mask	= MICREL_PHY_ID_MASK,
 	.name		= "Micrel KSZ8041",
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause
-				| SUPPORTED_Asym_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.driver_data	= &ksz8041_type,
 	.probe		= kszphy_probe,
@@ -864,8 +861,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ8041RNLI,
 	.phy_id_mask	= MICREL_PHY_ID_MASK,
 	.name		= "Micrel KSZ8041RNLI",
-	.features	= PHY_BASIC_FEATURES |
-			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.driver_data	= &ksz8041_type,
 	.probe		= kszphy_probe,
@@ -883,8 +879,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ8051,
 	.phy_id_mask	= MICREL_PHY_ID_MASK,
 	.name		= "Micrel KSZ8051",
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause
-				| SUPPORTED_Asym_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.driver_data	= &ksz8051_type,
 	.probe		= kszphy_probe,
@@ -902,7 +897,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ8001,
 	.name		= "Micrel KSZ8001 or KS8721",
 	.phy_id_mask	= 0x00fffffc,
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.driver_data	= &ksz8041_type,
 	.probe		= kszphy_probe,
@@ -920,7 +915,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ8081,
 	.name		= "Micrel KSZ8081 or KSZ8091",
 	.phy_id_mask	= MICREL_PHY_ID_MASK,
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.driver_data	= &ksz8081_type,
 	.probe		= kszphy_probe,
@@ -938,7 +933,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ8061,
 	.name		= "Micrel KSZ8061",
 	.phy_id_mask	= MICREL_PHY_ID_MASK,
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= kszphy_config_init,
 	.config_aneg	= genphy_config_aneg,
@@ -954,7 +949,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ9021,
 	.phy_id_mask	= 0x000ffffe,
 	.name		= "Micrel KSZ9021 Gigabit PHY",
-	.features	= (PHY_GBIT_FEATURES | SUPPORTED_Pause),
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.driver_data	= &ksz9021_type,
 	.config_init	= ksz9021_config_init,
@@ -973,7 +968,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ9031,
 	.phy_id_mask	= MICREL_PHY_ID_MASK,
 	.name		= "Micrel KSZ9031 Gigabit PHY",
-	.features	= (PHY_GBIT_FEATURES | SUPPORTED_Pause),
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.driver_data	= &ksz9021_type,
 	.config_init	= ksz9031_config_init,
@@ -990,7 +985,6 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ8873MLL,
 	.phy_id_mask	= MICREL_PHY_ID_MASK,
 	.name		= "Micrel KSZ8873MLL Switch",
-	.features	= (SUPPORTED_Pause | SUPPORTED_Asym_Pause),
 	.flags		= PHY_HAS_MAGICANEG,
 	.config_init	= kszphy_config_init,
 	.config_aneg	= ksz8873mll_config_aneg,
@@ -1004,7 +998,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id		= PHY_ID_KSZ886X,
 	.phy_id_mask	= MICREL_PHY_ID_MASK,
 	.name		= "Micrel KSZ886X Switch",
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.config_init	= kszphy_config_init,
 	.config_aneg	= genphy_config_aneg,

drivers/net/phy/microchip.c

@@ -146,8 +146,7 @@ static struct phy_driver microchip_phy_driver[] = {
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "Microchip LAN88xx",
 
-	.features	= (PHY_GBIT_FEATURES |
-			   SUPPORTED_Pause | SUPPORTED_Asym_Pause),
+	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
 
 	.probe		= lan88xx_probe,

drivers/net/phy/national.c

@@ -133,7 +133,7 @@ static struct phy_driver dp83865_driver[] = { {
 	.phy_id = DP83865_PHY_ID,
 	.phy_id_mask = 0xfffffff0,
 	.name = "NatSemi DP83865",
-	.features = PHY_GBIT_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.features = PHY_GBIT_FEATURES,
 	.flags = PHY_HAS_INTERRUPT,
 	.config_init = ns_config_init,
 	.config_aneg = genphy_config_aneg,

drivers/net/phy/phy_device.c

@@ -1719,6 +1719,25 @@ static int phy_probe(struct device *dev)
 	 */
 	of_set_phy_eee_broken(phydev);
 
+	/* The Pause Frame bits indicate that the PHY can support passing
+	 * pause frames. During autonegotiation, the PHYs will determine if
+	 * they should allow pause frames to pass.  The MAC driver should then
+	 * use that result to determine whether to enable flow control via
+	 * pause frames.
+	 *
+	 * Normally, PHY drivers should not set the Pause bits, and instead
+	 * allow phylib to do that.  However, there may be some situations
+	 * (e.g. hardware erratum) where the driver wants to set only one
+	 * of these bits.
+	 */
+	if (phydrv->features & (SUPPORTED_Pause | SUPPORTED_Asym_Pause)) {
+		phydev->supported &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause);
+		phydev->supported |= phydrv->features &
+				     (SUPPORTED_Pause | SUPPORTED_Asym_Pause);
+	} else {
+		phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
+	}
+
 	/* Set the state to READY by default */
 	phydev->state = PHY_READY;
 

drivers/net/phy/smsc.c

@@ -168,8 +168,7 @@ static struct phy_driver smsc_phy_driver[] = {
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "SMSC LAN83C185",
 
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause
-				| SUPPORTED_Asym_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
 
 	.probe		= smsc_phy_probe,
@@ -191,8 +190,7 @@ static struct phy_driver smsc_phy_driver[] = {
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "SMSC LAN8187",
 
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause
-				| SUPPORTED_Asym_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
 
 	.probe		= smsc_phy_probe,
@@ -214,8 +212,7 @@ static struct phy_driver smsc_phy_driver[] = {
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "SMSC LAN8700",
 
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause
-				| SUPPORTED_Asym_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
 
 	.probe		= smsc_phy_probe,
@@ -237,8 +234,7 @@ static struct phy_driver smsc_phy_driver[] = {
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "SMSC LAN911x Internal PHY",
 
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause
-				| SUPPORTED_Asym_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
 
 	.probe		= smsc_phy_probe,
@@ -259,8 +255,7 @@ static struct phy_driver smsc_phy_driver[] = {
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "SMSC LAN8710/LAN8720",
 
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause
-				| SUPPORTED_Asym_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
 
 	.probe		= smsc_phy_probe,
@@ -282,8 +277,7 @@ static struct phy_driver smsc_phy_driver[] = {
 	.phy_id_mask	= 0xfffffff0,
 	.name		= "SMSC LAN8740",
 
-	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause
-				| SUPPORTED_Asym_Pause),
+	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
 
 	.probe		= smsc_phy_probe,