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i2c and smbus block transaction handling have little in common, therefore split this function to improve code readability. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>