From: Philippe Mathieu-Daudé <f4...@amsat.org> Avoid propagating the clock change when the clock does not change.
Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org> Reviewed-by: Richard Henderson <richard.hender...@linaro.org> Message-id: 20200806123858.30058-4-f4...@amsat.org Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> --- include/hw/clock.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/include/hw/clock.h b/include/hw/clock.h index d85af45c967..9ecd78b2c30 100644 --- a/include/hw/clock.h +++ b/include/hw/clock.h @@ -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) -- 2.20.1