summaryrefslogtreecommitdiff
path: root/drivers/powercap/intel_rapl.c
diff options
context:
space:
mode:
authorSeiichi Ikarashi <s.ikarashi@jp.fujitsu.com>2015-08-19 08:26:03 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-08-29 02:46:40 +0300
commit5021282cc483d4126c1704942adb74806f7d15d6 (patch)
treeff1238b0000d8acefbe0a4ccca6efd1ef174e5d7 /drivers/powercap/intel_rapl.c
parent4e0bec9e833a6884dc2e242e45e0ebd99f46624e (diff)
downloadlinux-5021282cc483d4126c1704942adb74806f7d15d6.tar.xz
powercap / RAPL: disable the 2nd power limit properly
Let rapl_unregister_powercap() disable the second power limit only if it exists. Intel64 SDM Vol.3 14.9 says that the package domain has it but neither the power plane domain nor the DRAM domain has it. Signed-off-by: Seiichi Ikarashi <s.ikarashi@jp.fujitsu.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/powercap/intel_rapl.c')
-rw-r--r--drivers/powercap/intel_rapl.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c
index a5eddfbb0230..5efacd050c7d 100644
--- a/drivers/powercap/intel_rapl.c
+++ b/drivers/powercap/intel_rapl.c
@@ -1147,9 +1147,11 @@ static int rapl_unregister_powercap(void)
pr_debug("remove package, undo power limit on %d: %s\n",
rp->id, rd->name);
rapl_write_data_raw(rd, PL1_ENABLE, 0);
- rapl_write_data_raw(rd, PL2_ENABLE, 0);
rapl_write_data_raw(rd, PL1_CLAMP, 0);
- rapl_write_data_raw(rd, PL2_CLAMP, 0);
+ if (find_nr_power_limit(rd) > 1) {
+ rapl_write_data_raw(rd, PL2_ENABLE, 0);
+ rapl_write_data_raw(rd, PL2_CLAMP, 0);
+ }
if (rd->id == RAPL_DOMAIN_PACKAGE) {
rd_package = rd;
continue;