42 lines
1.8 KiB
Diff
42 lines
1.8 KiB
Diff
From 8f7e876273e294b732b42af2e5e6bba91d798954 Mon Sep 17 00:00:00 2001
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From: Michael Walle <michael@walle.cc>
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Date: Tue, 20 Apr 2021 12:29:29 +0200
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Subject: [PATCH] net: phy: at803x: fix probe error if copper page is selected
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The commit c329e5afb42f ("net: phy: at803x: select correct page on
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config init") selects the copper page during probe. This fails if the
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copper page was already selected. In this case, the value of the copper
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page (which is 1) is propagated through phy_restore_page() and is
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finally returned for at803x_probe(). Fix it, by just using the
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at803x_page_write() directly.
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Also in case of an error, the regulator is not disabled and leads to a
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WARN_ON() when the probe fails. This couldn't happen before, because
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at803x_parse_dt() was the last call in at803x_probe(). It is hard to
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see, that the parse_dt() actually enables the regulator. Thus move the
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regulator_enable() to the probe function and undo it in case of an
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error.
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Fixes: c329e5afb42f ("net: phy: at803x: select correct page on config init")
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Signed-off-by: Michael Walle <michael@walle.cc>
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Reviewed-by: David Bauer <mail@david-bauer.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/phy/at803x.c | 23 +++++++++++++++++------
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1 file changed, 17 insertions(+), 6 deletions(-)
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--- a/drivers/net/phy/at803x.c
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+++ b/drivers/net/phy/at803x.c
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@@ -289,8 +289,9 @@ static int at803x_probe(struct phy_devic
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* the PHY capabilities from the fiber side.
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*/
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if ((phydev->phy_id & phydev->drv->phy_id_mask) == (ATH8031_PHY_ID & phydev->drv->phy_id_mask)) {
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- ret = phy_select_page(phydev, AT803X_PAGE_COPPER);
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- ret = phy_restore_page(phydev, AT803X_PAGE_COPPER, ret);
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+ mutex_lock(&phydev->mdio.bus->mdio_lock);
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+ ret = at803x_write_page(phydev, AT803X_PAGE_COPPER);
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+ mutex_unlock(&phydev->mdio.bus->mdio_lock);
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}
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return ret;
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