Patch "net: dsa: bcm_sf2: Do not override speed settings" has been added to the 4.2-stable tree

Patch "net: dsa: bcm_sf2: Do not override speed settings" has been added to the 4.2-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    net: dsa: bcm_sf2: Do not override speed settings

to the 4.2-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-dsa-bcm_sf2-do-not-override-speed-settings.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Sep 30 05:25:07 CEST 2015
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Mon, 20 Jul 2015 17:49:55 -0700
Subject: net: dsa: bcm_sf2: Do not override speed settings

From: Florian Fainelli <f.fainelli@gmail.com>

[ Upstream d2eac98f7d1b950b762a7eca05a9ce0ea1d878d2 in net-next tree,
  will be pushed to Linus very soon. ]

The SF2 driver currently overrides speed settings for its port
configured using a fixed PHY, this is both unnecessary and incorrect,
because we keep feedback to the hardware parameters that we read from
the PHY device, which in the case of a fixed PHY cannot possibly change
speed.

This is a required change to allow the fixed PHY code to allow
registering a PHY with a link configured as DOWN by default and avoid
some sort of circular dependency where we require the link_update
callback to run to program the hardware, and we then utilize the fixed
PHY parameters to program the hardware with the same settings.

Fixes: 246d7f773c13 ("net: dsa: add Broadcom SF2 switch driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/dsa/bcm_sf2.c |   18 +-----------------
 1 file changed, 1 insertion(+), 17 deletions(-)

--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -905,15 +905,11 @@ static void bcm_sf2_sw_fixed_link_update
 					 struct fixed_phy_status *status)
 {
 	struct bcm_sf2_priv *priv = ds_to_priv(ds);
-	u32 duplex, pause, speed;
+	u32 duplex, pause;
 	u32 reg;
 
 	duplex = core_readl(priv, CORE_DUPSTS);
 	pause = core_readl(priv, CORE_PAUSESTS);
-	speed = core_readl(priv, CORE_SPDSTS);
-
-	speed >>= (port * SPDSTS_SHIFT);
-	speed &= SPDSTS_MASK;
 
 	status->link = 0;
 
@@ -948,18 +944,6 @@ static void bcm_sf2_sw_fixed_link_update
 		reg &= ~LINK_STS;
 	core_writel(priv, reg, CORE_STS_OVERRIDE_GMIIP_PORT(port));
 
-	switch (speed) {
-	case SPDSTS_10:
-		status->speed = SPEED_10;
-		break;
-	case SPDSTS_100:
-		status->speed = SPEED_100;
-		break;
-	case SPDSTS_1000:
-		status->speed = SPEED_1000;
-		break;
-	}
-
 	if ((pause & (1 << port)) &&
 	    (pause & (1 << (port + PAUSESTS_TX_PAUSE_SHIFT)))) {
 		status->asym_pause = 1;


Patches currently in stable-queue which might be from f.fainelli@gmail.com are

queue-4.2/net-dsa-bcm_sf2-do-not-override-speed-settings.patch
queue-4.2/net-phy-fixed_phy-handle-link-down-case.patch
queue-4.2/net-dsa-bcm_sf2-fix-ageing-conditions-and-operation.patch
queue-4.2/of_mdio-add-new-dt-property-managed-to-specify-the-phy-management-type.patch
queue-4.2/phylib-fix-device-deletion-order-in-mdiobus_unregister.patch
queue-4.2/net-dsa-bcm_sf2-fix-64-bits-register-writes.patch