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fa79baf4a6
Copy backport, hack, pending patch and config from 5.15 to 6.1. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
36 lines
1.3 KiB
Diff
36 lines
1.3 KiB
Diff
From 4dd2cc9b91ecb25f278a2c55e07e6455e9000e6b Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Sat, 22 Apr 2023 01:21:14 +0100
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Subject: [PATCH] net: phy: realtek: make sure paged read is protected by mutex
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As we cannot rely on phy_read_paged function before the PHY is
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identified, the paged read in rtlgen_supports_2_5gbps needs to be open
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coded as it is being called by the match_phy_device function, ie. before
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.read_page and .write_page have been populated.
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Make sure it is also protected by the MDIO bus mutex and use
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rtl821x_write_page instead of 3 individually locked MDIO bus operations.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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---
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drivers/net/phy/realtek.c | 8 +++++---
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1 file changed, 5 insertions(+), 3 deletions(-)
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--- a/drivers/net/phy/realtek.c
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+++ b/drivers/net/phy/realtek.c
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@@ -727,9 +727,11 @@ static bool rtlgen_supports_2_5gbps(stru
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{
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int val;
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- phy_write(phydev, RTL821x_PAGE_SELECT, 0xa61);
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- val = phy_read(phydev, 0x13);
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- phy_write(phydev, RTL821x_PAGE_SELECT, 0);
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+ mutex_lock(&phydev->mdio.bus->mdio_lock);
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+ rtl821x_write_page(phydev, 0xa61);
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+ val = __phy_read(phydev, 0x13);
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+ rtl821x_write_page(phydev, 0);
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+ mutex_unlock(&phydev->mdio.bus->mdio_lock);
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return val >= 0 && val & RTL_SUPPORTS_2500FULL;
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}
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