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authorYazen Ghannam <yazen.ghannam@amd.com>2018-11-12 19:00:55 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-01-14 11:54:47 +0100
commitf3355298fc5a24eb7606448bc02a08b3485e5979 (patch)
tree09c04d627e1ea31d44867d3dbd40afa607395653
parent6f9c104b183a5a4115a3999ddda6049cbfdbfbbc (diff)
ACPI / APEI: Fix parsing HEST that includes Deferred Machine Check subtable
ACPI 6.2 includes a new definition for a Deferred Machine Check "DMC" subtable. The definition of this subtable was included in following commit: c042933df2b1 (ACPICA: Add support for new HEST subtable) However, the HEST parsing function was not updated to include this new subtable. Therefore, Linux will fail to parse the HEST on systems that include a DMC entry. Add the length check for the new DMC subtable so that HEST parsing doesn't fail on systems that include it. Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com> Reviewed-by: Borislav Petkov <bp@suse.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r--drivers/acpi/apei/hest.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index b1e9f81ebeea..0935a0ef37e5 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -53,6 +53,7 @@ static const int hest_esrc_len_tab[ACPI_HEST_TYPE_RESERVED] = {
[ACPI_HEST_TYPE_AER_BRIDGE] = sizeof(struct acpi_hest_aer_bridge),
[ACPI_HEST_TYPE_GENERIC_ERROR] = sizeof(struct acpi_hest_generic),
[ACPI_HEST_TYPE_GENERIC_ERROR_V2] = sizeof(struct acpi_hest_generic_v2),
+ [ACPI_HEST_TYPE_IA32_DEFERRED_CHECK] = -1,
};
static int hest_esrc_len(struct acpi_hest_header *hest_hdr)
@@ -75,6 +76,11 @@ static int hest_esrc_len(struct acpi_hest_header *hest_hdr)
mc = (struct acpi_hest_ia_machine_check *)hest_hdr;
len = sizeof(*mc) + mc->num_hardware_banks *
sizeof(struct acpi_hest_ia_error_bank);
+ } else if (hest_type == ACPI_HEST_TYPE_IA32_DEFERRED_CHECK) {
+ struct acpi_hest_ia_deferred_check *mc;
+ mc = (struct acpi_hest_ia_deferred_check *)hest_hdr;
+ len = sizeof(*mc) + mc->num_hardware_banks *
+ sizeof(struct acpi_hest_ia_error_bank);
}
BUG_ON(len == -1);