Test rate value before calculating the div value to avoid div by zero.
Signed-off-by: NBoris BREZILLON <boris.brezillon@free-electrons.com>
Reported-by: NGaël PORTAY <gael.portay@gmail.com>
Tested-by: NGaël PORTAY <gael.portay@gmail.com>
Signed-off-by: NMike Turquette <mturquette@linaro.org>