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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>
This commit is contained in:
Seiichi Ikarashi 2015-08-19 14:26:03 +09:00 committed by Rafael J. Wysocki
parent 4e0bec9e83
commit 5021282cc4
1 changed files with 4 additions and 2 deletions
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6
drivers/powercap/intel_rapl.c
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@ -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;