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powercap/intel_rapl: Fix domain detection

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As only the low 32 bits of the RAPL_DOMAIN_REG_STATUS register
represents the energy counter, and the high 32 bits are reserved,
detect the existence of a RAPL domain by checking the low 32 bits only.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Zhang Rui 2020-10-13 15:42:40 +08:00 committed by Rafael J. Wysocki
parent 0b8417c141
commit 7a57e9f112
1 changed files with 1 additions and 1 deletions
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2
drivers/powercap/intel_rapl_common.c
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@ -1228,7 +1228,7 @@ static int rapl_check_domain(int cpu, int domain, struct rapl_package *rp)
* values, otherwise skip it.
*/
ra.mask = ~0;
ra.mask = ENERGY_STATUS_MASK;
if (rp->priv->read_raw(cpu, &ra) || !ra.value)
return -ENODEV;