From 7b8747725d0a6842a82ea60fe95b9d4d7ae008fd Mon Sep 17 00:00:00 2001 From: Jacob Pan Date: Mon, 10 Feb 2014 06:11:51 -0800 Subject: powercap / intel_rapl: relax sanity check on energy counters Some RAPL domains may not be active at the time driver is being loaded. Checking energy counter increment may be too strict and time consuming. So relax the sanity check on energy counters of these domains. Otherwise, they may be ignored and become unavailable to the powercap framework. Signed-off-by: Jacob Pan Signed-off-by: Rafael J. Wysocki --- drivers/powercap/intel_rapl.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/powercap') diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c index 3c6768378a9..0e37fe106eb 100644 --- a/drivers/powercap/intel_rapl.c +++ b/drivers/powercap/intel_rapl.c @@ -1147,6 +1147,11 @@ static int rapl_check_domain(int cpu, int domain) if (rdmsrl_safe_on_cpu(cpu, msr, &val1)) return -ENODEV; + /* PP1/uncore/graphics domain may not be active at the time of + * driver loading. So skip further checks. + */ + if (domain == RAPL_DOMAIN_PP1) + return 0; /* energy counters roll slowly on some domains */ while (++retry < 10) { usleep_range(10000, 15000); -- cgit v1.2.3-70-g09d2