The pm_genpd_present() iterates over list of domains so grabbing a gpd_list_lock mutex is necessary before calling it. Otherwise we could end up in iterating over and modifying the list at the same time.
Signed-off-by: Krzysztof Kozlowski <[email protected]> --- drivers/base/power/domain.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 2e8d0f423507..2a6935dc0164 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -1099,8 +1099,13 @@ static void genpd_syscore_switch(struct device *dev, bool suspend) struct generic_pm_domain *genpd; genpd = dev_to_genpd(dev); - if (!pm_genpd_present(genpd)) + + mutex_lock(&gpd_list_lock); + if (!pm_genpd_present(genpd)) { + mutex_unlock(&gpd_list_lock); return; + } + mutex_unlock(&gpd_list_lock); if (suspend) { genpd->suspended_count++; -- 2.9.3
