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clk: shmobile: div6: Avoid division by zero in .round_rate()

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Anyone may call clk_round_rate() with a zero rate value, so we have to
protect against that.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
This commit is contained in:
Geert Uytterhoeven 2015-02-04 13:27:21 +01:00 committed by Michael Turquette
parent 039e597075
commit 5469d4f22e
1 changed files with 3 additions and 0 deletions
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drivers/clk/shmobile/clk-div6.c
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@ -90,6 +90,9 @@ static unsigned int cpg_div6_clock_calc_div(unsigned long rate,
{
unsigned int div;
if (!rate)
rate = 1;
div = DIV_ROUND_CLOSEST(parent_rate, rate);
return clamp_t(unsigned int, div, 1, 64);
}