dsa: qca8k: Use nested lock to avoid splat

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[ Upstream commit 078e0d596f ]

qca8k_phy_eth_command() is used to probe the child MDIO bus while the
parent MDIO is locked. This causes lockdep splat, reporting a possible
deadlock. It is not an actually deadlock, because different locks are
used. By making use of mutex_lock_nested() we can avoid this false
positive.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20241110175955.3053664-1-andrew@lunn.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Andrew Lunn 2024-11-10 18:59:55 +01:00 • committed by Greg Kroah-Hartman

parent 10e8a2dec9

commit 916b577a2c

1 changed files with 1 additions and 1 deletions

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drivers/net/dsa/qca/qca8k-8xxx.c

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