From: Ulf Hansson ulf.hansson@linaro.org
commit 56cb26891ea4180121265dc6b596015772c4a4b8 upstream.
Commit 2c361684803e ("PM / Domains: Don't treat zero found compatible idle states as an error"), moved of_genpd_parse_idle_states() towards allowing none compatible idle state to be found for the device node, rather than returning an error code.
However, it didn't consider that the "domain-idle-states" DT property may be missing as it's optional, which makes of_count_phandle_with_args() to return -ENOENT. Let's fix this to make the behaviour consistent.
Fixes: 2c361684803e ("PM / Domains: Don't treat zero found compatible idle states as an error") Reported-by: Benjamin Gaignard benjamin.gaignard@st.com Cc: 4.20+ stable@vger.kernel.org # 4.20+ Reviewed-by: Sudeep Holla sudeep.holla@arm.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/base/power/domain.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2653,7 +2653,7 @@ static int genpd_iterate_idle_states(str
ret = of_count_phandle_with_args(dn, "domain-idle-states", NULL); if (ret <= 0) - return ret; + return ret == -ENOENT ? 0 : ret;
/* Loop over the phandles until all the requested entry is found */ of_for_each_phandle(&it, ret, dn, "domain-idle-states", NULL, 0) {