net: bcmgenet: synchronize EXT_RGMII_OOB_CTRL access

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commit d85cf67a33 upstream.

The EXT_RGMII_OOB_CTRL register can be written from different
contexts. It is predominantly written from the adjust_link
handler which is synchronized by the phydev->lock, but can
also be written from a different context when configuring the
mii in bcmgenet_mii_config().

The chances of contention are quite low, but it is conceivable
that adjust_link could occur during resume when WoL is enabled
so use the phydev->lock synchronizer in bcmgenet_mii_config()
to be sure.

Fixes: afe3f907d2 ("net: bcmgenet: power on MII block for all MII modes")
Cc: stable@vger.kernel.org
Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Doug Berger 2024-04-25 15:27:19 -07:00 • committed by Greg Kroah-Hartman

parent ef31b4647e

commit 8b3845de02

1 changed files with 3 additions and 1 deletions

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drivers/net/ethernet/broadcom/genet/bcmmii.c

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