r8169: use spinlock to protect mac ocp register access

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For disabling ASPM during NAPI poll we'll have to access mac ocp
registers in atomic context. This could result in races because
a mac ocp read consists of a write to register OCPDR, followed
by a read from the same register. Therefore add a spinlock to
protect access to mac ocp registers.

Reviewed-by: Simon Horman <simon.horman@corigine.com>
Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Heiner Kallweit 2023-03-06 22:23:15 +01:00 • committed by David S. Miller

parent 8ca5a5790b

commit 91c8643578

1 changed files with 33 additions and 4 deletions

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drivers/net/ethernet/realtek/r8169_main.c

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