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The same serial hardware is present on LS2080A which is arm64, and LS1021A which is arm32, so don't limit the workaround to PPC. Unlike PPC which uses arch/powerpc/kernel/legacy_serial.c, the ARM targets use drivers/tty/serial/of_serial.c, so add the handle_irq override check there as well. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>