Re: [RFC 1/2] ACPI, APEI, Add apei_exec_run_optional

From: Gong Chen
Date: Tue Jul 05 2011 - 09:53:31 EST


ä 2011/7/5 14:07, Huang Ying åé:
Some actions in APEI ERST and EINJ tables are optional, for example,
ACPI_EINJ_BEGIN_OPERATION action is used to do some preparation for
error injection, and firmware may choose to do nothing here. While
some other actions are mandatory, for example, firmware must provide
ACPI_EINJ_GET_ERROR_TYPE implementation.

Original implementation treats all actions as optional (that is, can
have no instructions), that may cause issue if firmware does not
provide some mandatory actions. To fix this, this patch adds
apei_exec_run_optional, which should be used for optional actions.
The original apei_exec_run should be used for mandatory actions.

Cc: Thomas Renninger<trenn@xxxxxxxxxx>
Signed-off-by: Huang Ying<ying.huang@xxxxxxxxx>
---
drivers/acpi/apei/apei-base.c | 9 +++++----
drivers/acpi/apei/apei-internal.h | 13 ++++++++++++-
2 files changed, 17 insertions(+), 5 deletions(-)

--- a/drivers/acpi/apei/apei-base.c
+++ b/drivers/acpi/apei/apei-base.c
@@ -157,9 +157,10 @@ EXPORT_SYMBOL_GPL(apei_exec_noop);
* Interpret the specified action. Go through whole action table,
* execute all instructions belong to the action.
*/
-int apei_exec_run(struct apei_exec_context *ctx, u8 action)
+int __apei_exec_run(struct apei_exec_context *ctx, u8 action,
+ bool optional)
{
- int rc;
+ int rc = -ENOENT;
u32 i, ip;
struct acpi_whea_header *entry;
apei_exec_ins_func_t run;
@@ -198,9 +199,9 @@ rewind:
goto rewind;
}

- return 0;
+ return !optional&& rc< 0 ? rc : 0;

if one operation is optional but running into errors when executing this kind of command,
here just ignoring it. Is it reasonable ?

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