target/linux/brcm63xx/patches-4.4/001-4.12-08-net-phy-Call-bus-reset-after-releasing-PHYs-from-res.patch

   1 From df0c8d911abf6ba97b2c2fc3c5a12769e0b081a3 Mon Sep 17 00:00:00 2001
   2 From: Florian Fainelli <f.fainelli@gmail.com>
   3 Date: Thu, 11 May 2017 11:24:16 -0700
   4 Subject: [PATCH] net: phy: Call bus->reset() after releasing PHYs from reset
   5
   6 The API convention makes it that a given MDIO bus reset should be able
   7 to access PHY devices in its reset() callback and perform additional
   8 MDIO accesses in order to bring the bus and PHYs in a working state.
   9
  10 Commit 69226896ad63 ("mdio_bus: Issue GPIO RESET to PHYs.") broke that
  11 contract by first calling bus->reset() and then release all PHYs from
  12 reset using their shared GPIO line, so restore the expected
  13 functionality here.
  14
  15 Fixes: 69226896ad63 ("mdio_bus: Issue GPIO RESET to PHYs.")
  16 Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
  17 Signed-off-by: David S. Miller <davem@davemloft.net>
  18 ---
  19  drivers/net/phy/mdio_bus.c | 6 +++---
  20  1 file changed, 3 insertions(+), 3 deletions(-)
  21
  22 --- a/drivers/net/phy/mdio_bus.c
  23 +++ b/drivers/net/phy/mdio_bus.c
  24 @@ -279,9 +279,6 @@ int __mdiobus_register(struct mii_bus *b
  25
  26         mutex_init(&bus->mdio_lock);
  27
  28 -       if (bus->reset)
  29 -               bus->reset(bus);
  30 -
  31         /* de-assert bus level PHY GPIO resets */
  32         if (bus->num_reset_gpios > 0) {
  33                 bus->reset_gpiod = devm_kcalloc(&bus->dev,
  34 @@ -311,6 +308,9 @@ int __mdiobus_register(struct mii_bus *b
  35                 }
  36         }
  37
  38 +       if (bus->reset)
  39 +               bus->reset(bus);
  40 +
  41         for (i = 0; i < PHY_MAX_ADDR; i++) {
  42                 if ((bus->phy_mask & (1 << i)) == 0) {
  43                         struct phy_device *phydev;