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platform/x86: intel_pmt_telemetry: Ignore zero sized entries

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Some devices may expose non-functioning entries that are reserved for
future use. These entries have zero size. Ignore them during probe.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/20210817224018.1013192-5-david.e.box@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
David E. Box 2021-08-17 15:40:17 -07:00 committed by Hans de Goede
parent 3ae86d2d47
commit ef195e8a7f
1 changed files with 8 additions and 0 deletions
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8
drivers/platform/x86/intel/pmt/telemetry.c
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@ -61,6 +61,14 @@ static int pmt_telem_header_decode(struct intel_pmt_entry *entry,
/* Size is measured in DWORDS, but accessor returns bytes */
header->size = TELEM_SIZE(readl(disc_table));
/*
* Some devices may expose non-functioning entries that are
* reserved for future use. They have zero size. Do not fail
* probe for these. Just ignore them.
*/
if (header->size == 0)
return 1;
return 0;
}