Commit ef195e8a authored by David E. Box's avatar David E. Box Committed by Hans de Goede
Browse files

platform/x86: intel_pmt_telemetry: Ignore zero sized entries 



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: default avatarDavid 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: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent 3ae86d2d

drivers/platform/x86/intel/pmt/telemetry.c

+8 −0
Original line number Diff line number Diff line
@@ -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;

}