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45 lines
1.5 KiB
Diff
45 lines
1.5 KiB
Diff
From 32085f25d7b68404055f3525c780142fc72e543f Mon Sep 17 00:00:00 2001
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From: David Bauer <mail@david-bauer.net>
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Date: Fri, 22 Nov 2019 22:44:51 +0100
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Subject: [PATCH] mdio_bus: don't use managed reset-controller
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Geert Uytterhoeven reported that using devm_reset_controller_get leads
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to a WARNING when probing a reset-controlled PHY. This is because the
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device devm_reset_controller_get gets supplied is not actually the
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one being probed.
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Acquire an unmanaged reset-control as well as free the reset_control on
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unregister to fix this.
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Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
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CC: Andrew Lunn <andrew@lunn.ch>
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Signed-off-by: David Bauer <mail@david-bauer.net>
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Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/phy/mdio_bus.c | 6 ++++--
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1 file changed, 4 insertions(+), 2 deletions(-)
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--- a/drivers/net/phy/mdio_bus.c
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+++ b/drivers/net/phy/mdio_bus.c
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@@ -74,8 +74,8 @@ static int mdiobus_register_reset(struct
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struct reset_control *reset = NULL;
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if (mdiodev->dev.of_node)
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- reset = devm_reset_control_get_exclusive(&mdiodev->dev,
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- "phy");
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+ reset = of_reset_control_get_exclusive(mdiodev->dev.of_node,
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+ "phy");
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if (PTR_ERR(reset) == -ENOENT ||
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PTR_ERR(reset) == -ENOTSUPP)
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reset = NULL;
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@@ -118,6 +118,8 @@ int mdiobus_unregister_device(struct mdi
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if (mdiodev->bus->mdio_map[mdiodev->addr] != mdiodev)
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return -EINVAL;
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+ reset_control_put(mdiodev->reset_ctrl);
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+
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mdiodev->bus->mdio_map[mdiodev->addr] = NULL;
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return 0;
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