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Charles Perry
96aefe3afe
MDIO bus controllers are not required to wait for write transactions to complete before returning as synchronization is often achieved by polling status bits. This can cause issues when disabling interrupts since an interrupt could fire before the interrupt handler is unregistered and there's no status bit to poll. Add a phy_write_barrier() function and use it in phy_disable_interrupts() to fix this issue. The write barrier just reads an MII register and discards the value, which is enough to guarantee that previous writes have completed. Signed-off-by: Charles Perry <charles.perry@microchip.com> Link: https://patch.msgid.link/20260408131821.1145334-4-charles.perry@microchip.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>