From: "David E. Box" <david.e.box@linux.intel.com>
To: david.e.box@linux.intel.com, hdegoede@redhat.com, markgross@kernel.org
Cc: platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] platform/x86/intel/pmt: Ignore uninitialized entries
Date: Wed, 12 Apr 2023 18:29:22 -0700 [thread overview]
Message-ID: <20230413012922.1521377-1-david.e.box@linux.intel.com> (raw)
On Intel Xeon, unused PMT regions will have uninitialized discovery headers
containing all 0xF. Instead of returning an error, just skip the region.
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
---
drivers/platform/x86/intel/pmt/telemetry.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/platform/x86/intel/pmt/telemetry.c b/drivers/platform/x86/intel/pmt/telemetry.c
index 71cdef42084a..39cbc87cc28a 100644
--- a/drivers/platform/x86/intel/pmt/telemetry.c
+++ b/drivers/platform/x86/intel/pmt/telemetry.c
@@ -78,7 +78,7 @@ static int pmt_telem_header_decode(struct intel_pmt_entry *entry,
* reserved for future use. They have zero size. Do not fail
* probe for these. Just ignore them.
*/
- if (header->size == 0)
+ if (header->size == 0 || header->access_type == 0xF)
return 1;
return 0;
base-commit: 5b309e80f457ebb41770e0122766825a78cfc11b
prerequisite-patch-id: a3bf21940fa02eb2f3adb4bd2d3a93df14df077a
--
2.34.1
next reply other threads:[~2023-04-13 1:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-13 1:29 David E. Box [this message]
2023-04-13 10:13 ` [PATCH] platform/x86/intel/pmt: Ignore uninitialized entries Ilpo Järvinen
2023-04-17 10:13 ` Hans de Goede
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