clk_round_rate() returns singed value which was assigned to an unsigned
variable.
So it can't be checked for negative.
Signed-off-by: NJonghwan Choi <jhbird.choi@samsung.com>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>