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hw/clock: Only propagate clock changes if the clock is changed 

Avoid propagating the clock change when the clock does not change.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200806123858.30058-4-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2020-08-28 10:02:44 +01:00 committed by Peter Maydell
parent 15aa2876d9
commit 96250eab90
1 changed files with 3 additions and 2 deletions
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5
include/hw/clock.h
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@ -165,8 +165,9 @@ void clock_propagate(Clock *clk);
*/
static inline void clock_update(Clock *clk, uint64_t value)
{
clock_set(clk, value);
clock_propagate(clk);
if (clock_set(clk, value)) {
clock_propagate(clk);
}
}
static inline void clock_update_hz(Clock *clk, unsigned hz)