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| author | Prarit Bhargava <prarit@redhat.com> | 2015-12-09 08:31:12 -0500 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-12-12 02:31:11 +0100 |
| commit | 79a21dbfae3cd40d5a801778071a9967b79c2c20 (patch) | |
| tree | c55b58db9379107290a0dc2bafe4f04530b707c0 /drivers/powercap | |
| parent | 89e7b2553ae182a4b2a19e2e99a59ad0d3ccb1ed (diff) | |
| download | linux-79a21dbfae3cd40d5a801778071a9967b79c2c20.tar.gz linux-79a21dbfae3cd40d5a801778071a9967b79c2c20.tar.bz2 linux-79a21dbfae3cd40d5a801778071a9967b79c2c20.zip | |
powercap / RAPL: fix BIOS lock check
Intel RAPL initialized on several systems where the BIOS lock bit (msr
0x610, bit 63) was set. This occured because the return value of
rapl_read_data_raw() was being checked, rather than the value of the variable
passed in, locked.
This patch properly implments the rapl_read_data_raw() call to check the
variable locked, and now the Intel RAPL driver outputs the warning:
intel_rapl: RAPL package 0 domain package locked by BIOS
and does not initialize for the package.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/powercap')
| -rw-r--r-- | drivers/powercap/intel_rapl.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c index cc97f0869791..48747c28a43d 100644 --- a/drivers/powercap/intel_rapl.c +++ b/drivers/powercap/intel_rapl.c @@ -1341,10 +1341,13 @@ static int rapl_detect_domains(struct rapl_package *rp, int cpu) for (rd = rp->domains; rd < rp->domains + rp->nr_domains; rd++) { /* check if the domain is locked by BIOS */ - if (rapl_read_data_raw(rd, FW_LOCK, false, &locked)) { + ret = rapl_read_data_raw(rd, FW_LOCK, false, &locked); + if (ret) + return ret; + if (locked) { pr_info("RAPL package %d domain %s locked by BIOS\n", rp->id, rd->name); - rd->state |= DOMAIN_STATE_BIOS_LOCKED; + rd->state |= DOMAIN_STATE_BIOS_LOCKED; } } |