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ACPI: extlog: Handle multiple records

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[ Upstream commit f6ec01da40 ]

If there is no user space consumer of extlog_mem trace records, then
Linux properly handles multiple error records in an ELOG block

	extlog_print()
	  print_extlog_rcd()
	    __print_extlog_rcd()
	      cper_estatus_print()
		apei_estatus_for_each_section()

But the other code path hard codes looking for a single record to
output a trace record.

Fix by using the same apei_estatus_for_each_section() iterator
to step over all records.

Fixes: 2dfb7d51a6 ("trace, RAS: Add eMCA trace event interface")
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tony Luck 2022-10-10 13:34:23 -07:00 committed by Greg Kroah-Hartman
parent f43fc13cf8
commit 01201fc4c4
1 changed files with 20 additions and 13 deletions
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33
drivers/acpi/acpi_extlog.c
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@ -12,6 +12,7 @@
#include <linux/ratelimit.h>
#include <linux/edac.h>
#include <linux/ras.h>
#include <acpi/ghes.h>
#include <asm/cpu.h>
#include <asm/mce.h>
@ -138,8 +139,8 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
int cpu = mce->extcpu;
struct acpi_hest_generic_status *estatus, *tmp;
struct acpi_hest_generic_data *gdata;
const guid_t *fru_id = &guid_null;
char *fru_text = "";
const guid_t *fru_id;
char *fru_text;
guid_t *sec_type;
static u32 err_seq;
@ -160,17 +161,23 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
/* log event via trace */
err_seq++;
gdata = (struct acpi_hest_generic_data *)(tmp + 1);
if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
fru_id = (guid_t *)gdata->fru_id;
if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
fru_text = gdata->fru_text;
sec_type = (guid_t *)gdata->section_type;
if (guid_equal(sec_type, &CPER_SEC_PLATFORM_MEM)) {
struct cper_sec_mem_err *mem = (void *)(gdata + 1);
if (gdata->error_data_length >= sizeof(*mem))
trace_extlog_mem_event(mem, err_seq, fru_id, fru_text,
(u8)gdata->error_severity);
apei_estatus_for_each_section(tmp, gdata) {
if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
fru_id = (guid_t *)gdata->fru_id;
else
fru_id = &guid_null;
if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
fru_text = gdata->fru_text;
else
fru_text = "";
sec_type = (guid_t *)gdata->section_type;
if (guid_equal(sec_type, &CPER_SEC_PLATFORM_MEM)) {
struct cper_sec_mem_err *mem = (void *)(gdata + 1);
if (gdata->error_data_length >= sizeof(*mem))
trace_extlog_mem_event(mem, err_seq, fru_id, fru_text,
(u8)gdata->error_severity);
}
}
out: