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The condition in __serial_lpc32xx_tx()'s loop is barely readable. Extract it to a separate function. This will make the cleanup in the next patches easier too. Cc: Vladimir Zapolskiy <vz@mleia.com> Cc: <linux-arm-kernel@lists.infradead.org> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20220920052049.20507-6-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>