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hw/timer/exynos4210_mct: Avoid overflow in exynos4210_ltick_recalc_count 

Add casts to avoid potentially overflowing the multiplications
of 32 bit quantities in exynos4210_ltick_recalc_count().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
This commit is contained in:
Peter Maydell 2014-05-13 16:09:39 +01:00
parent 2a41c92854
commit c3a699be3c
1 changed files with 2 additions and 2 deletions
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4
hw/timer/exynos4210_mct.c
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@ -818,14 +818,14 @@ static void exynos4210_ltick_recalc_count(struct tick_timer *s)
*/ */
if (s->last_tcnto) { if (s->last_tcnto) {
to_count = s->last_tcnto * s->last_icnto; to_count = (uint64_t)s->last_tcnto * s->last_icnto;
} else { } else {
to_count = s->last_icnto; to_count = s->last_icnto;
} }
} else { } else {
/* distance is passed, recalculate with tcnto * icnto */ /* distance is passed, recalculate with tcnto * icnto */
if (s->icntb) { if (s->icntb) {
s->distance = s->tcntb * s->icntb; s->distance = (uint64_t)s->tcntb * s->icntb;
} else { } else {
s->distance = s->tcntb; s->distance = s->tcntb;
} }