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Box" 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 Message-Id: <20230413012922.1521377-1-david.e.box@linux.intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_PASS, SPF_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1763023479268187265?= X-GMAIL-MSGID: =?utf-8?q?1763023479268187265?= 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 Reviewed-by: Ilpo Järvinen --- drivers/platform/x86/intel/pmt/telemetry.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) base-commit: 5b309e80f457ebb41770e0122766825a78cfc11b prerequisite-patch-id: a3bf21940fa02eb2f3adb4bd2d3a93df14df077a 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;