Re: [PATCH] ACPICA: Log Exceptions and Errors as warning while loading extra tables

Hans de Goede <hdegoede@xxxxxxxxxx> · Fri, 3 Mar 2017 14:55:58 +0100

Hi,

On 03-03-17 03:48, Zheng, Lv wrote:
Hi,

From: Hans de Goede [mailto:hdegoede@xxxxxxxxxx]
Subject: Re: [PATCH] ACPICA: Log Exceptions and Errors as warning while loading extra tables

Hi,

On 02-03-17 03:03, Zheng, Lv wrote:
Hi,

From: Hans de Goede [mailto:hdegoede@xxxxxxxxxx]
Subject: [PATCH] ACPICA: Log Exceptions and Errors as warning while loading extra tables

Honor the "Ignore errors while loading tables, get as many as possible"
comment in the tbxfload.c code and log any exceptions and errors during
loading extra tables as warnings.

This is important because many desktop and embedded applicance Linux
use-cases have a hard requirement of not showing any (scary) text
messages during system bootup, which get broken by errors reported
by attempts to load the extra tables, as messaged logged at a KERN_ERR
level are always shown even if the quiet kernel cmdline option is used.

This looks worse than comparing the tables.

This is really another patch entirely, it would also make the duplicate
table thing less of an issue, but even with a fix for the duplicate tables
we still need something like this to lower the log level of errors while
loading extra tables as that currently causes errors to be spewn on
way to many machines, e.g. on my main workstation I get:

[    0.019856] ACPI Warning: [\_SB_.PCI0.XHC_.RHUB.HS11] Namespace lookup failure, AE_NOT_FOUND
(20160930/dswload-210)
[    0.019859] ACPI Warning: AE_NOT_FOUND, During name lookup/catalog (20160930/psobject-227)
[    0.019886] ACPI Warning: AE_NOT_FOUND, (SSDT:xh_rvp08) while loading table (20160930/tbxfload-268)
[    0.026491] ACPI Warning: 1 table load failures, 5 successful (20160930/tbxfload-287)

However some of them indicating a real issue that can be fixed by:
1. Merging this pull request: https://github.com/acpica/acpica/pull/189 (I made it no longer dependent on other fixes)
2. Setting acpi_gbl_parse_table_as_term_list to TRUE.
It's not far away than actually solving the real issues.
So why do we use a one-size-fits-all solution for such kind of errors?

Ok, I agree that doing proper fixes for errors like this is better,
so lets drop this patch.

Regards,

Hans



Thanks and best regards
Lv



(this is with the patch, before that this were all errors and exceptions).

Add IIRC I'm getting yet another set of errors on my XPS 15, etc.

Regards,

Hans



So before determining what should be done for the check of the duplicated aml tables.
Let's skip this submission.

Thanks
Lv


Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
 drivers/acpi/acpica/acglobal.h  |  1 +
 drivers/acpi/acpica/tbxfload.c  |  4 +++-
 drivers/acpi/acpica/uterror.c   | 10 ++++++++--
 drivers/acpi/acpica/utxferror.c | 19 ++++++++++---------
 4 files changed, 22 insertions(+), 12 deletions(-)

diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index edbb42e..5ae9eee 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -146,6 +146,7 @@ ACPI_GLOBAL(acpi_cache_t *, acpi_gbl_operand_cache);
 ACPI_INIT_GLOBAL(u32, acpi_gbl_startup_flags, 0);
 ACPI_INIT_GLOBAL(u8, acpi_gbl_shutdown, TRUE);
 ACPI_INIT_GLOBAL(u8, acpi_gbl_early_initialization, TRUE);
+ACPI_INIT_GLOBAL(u8, acpi_gbl_log_errors_exceptions_as_warnings, FALSE);

 /* Global handlers */

diff --git a/drivers/acpi/acpica/tbxfload.c b/drivers/acpi/acpica/tbxfload.c
index 1971cd7..b0c5478 100644
--- a/drivers/acpi/acpica/tbxfload.c
+++ b/drivers/acpi/acpica/tbxfload.c
@@ -256,6 +256,7 @@ acpi_status acpi_tb_load_namespace(void)
 		}

 		/* Ignore errors while loading tables, get as many as possible */
+		acpi_gbl_log_errors_exceptions_as_warnings = TRUE;

 		(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 		status = acpi_ns_load_table(i, acpi_gbl_root_node);
@@ -276,11 +277,12 @@ acpi_status acpi_tb_load_namespace(void)
 			tables_loaded++;
 		}
 	}
+	acpi_gbl_log_errors_exceptions_as_warnings = FALSE;

 	if (!tables_failed) {
 		ACPI_INFO(("%u ACPI AML tables successfully acquired and loaded", tables_loaded));
 	} else {
-		ACPI_ERROR((AE_INFO,
+		ACPI_WARNING((AE_INFO,
 			    "%u table load failures, %u successful",
 			    tables_failed, tables_loaded));

diff --git a/drivers/acpi/acpica/uterror.c b/drivers/acpi/acpica/uterror.c
index 475932c..e01ff1f 100644
--- a/drivers/acpi/acpica/uterror.c
+++ b/drivers/acpi/acpica/uterror.c
@@ -205,7 +205,10 @@ acpi_ut_namespace_error(const char *module_name,
 	char *name = NULL;

 	ACPI_MSG_REDIRECT_BEGIN;
-	acpi_os_printf(ACPI_MSG_ERROR);
+	if (acpi_gbl_log_errors_exceptions_as_warnings)
+		acpi_os_printf(ACPI_MSG_WARNING);
+	else
+		acpi_os_printf(ACPI_MSG_ERROR);

 	if (lookup_status == AE_BAD_CHARACTER) {

@@ -269,7 +272,10 @@ acpi_ut_method_error(const char *module_name,
 	struct acpi_namespace_node *node = prefix_node;

 	ACPI_MSG_REDIRECT_BEGIN;
-	acpi_os_printf(ACPI_MSG_ERROR);
+	if (acpi_gbl_log_errors_exceptions_as_warnings)
+		acpi_os_printf(ACPI_MSG_WARNING);
+	else
+		acpi_os_printf(ACPI_MSG_ERROR);

 	if (path) {
 		status = acpi_ns_get_node(prefix_node, path,
diff --git a/drivers/acpi/acpica/utxferror.c b/drivers/acpi/acpica/utxferror.c
index d9f15cb..c8ca25af 100644
--- a/drivers/acpi/acpica/utxferror.c
+++ b/drivers/acpi/acpica/utxferror.c
@@ -73,7 +73,10 @@ acpi_error(const char *module_name, u32 line_number, const char *format, ...)
 	va_list arg_list;

 	ACPI_MSG_REDIRECT_BEGIN;
-	acpi_os_printf(ACPI_MSG_ERROR);
+	if (acpi_gbl_log_errors_exceptions_as_warnings)
+		acpi_os_printf(ACPI_MSG_WARNING);
+	else
+		acpi_os_printf(ACPI_MSG_ERROR);

 	va_start(arg_list, format);
 	acpi_os_vprintf(format, arg_list);
@@ -107,16 +110,14 @@ acpi_exception(const char *module_name,
 	va_list arg_list;

 	ACPI_MSG_REDIRECT_BEGIN;
-
-	/* For AE_OK, just print the message */
-
-	if (ACPI_SUCCESS(status)) {
+	if (acpi_gbl_log_errors_exceptions_as_warnings)
+		acpi_os_printf(ACPI_MSG_WARNING);
+	else
 		acpi_os_printf(ACPI_MSG_EXCEPTION);

-	} else {
-		acpi_os_printf(ACPI_MSG_EXCEPTION "%s, ",
-			       acpi_format_exception(status));
-	}
+	/* For AE_OK, just print the message */
+	if (ACPI_FAILURE(status))
+		acpi_os_printf("%s, ", acpi_format_exception(status));

 	va_start(arg_list, format);
 	acpi_os_vprintf(format, arg_list);
--
2.9.3

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