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ACPI, APEI, ERST, Prevent erst_dbg from loading if ERST is disabled
author
Huang Ying
<ying.huang@intel.com>
Wed, 13 Jul 2011 05:14:13 +0000
(13:14 +0800)
committer
Len Brown
<len.brown@intel.com>
Thu, 14 Jul 2011 03:29:52 +0000
(23:29 -0400)
erst_dbg module can not work when ERST is disabled. So disable module
loading to provide clearer information to user.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
drivers/acpi/apei/erst-dbg.c
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diff --git
a/drivers/acpi/apei/erst-dbg.c
b/drivers/acpi/apei/erst-dbg.c
index
a4cfb64
..
cb04aa4
100644
(file)
--- a/
drivers/acpi/apei/erst-dbg.c
+++ b/
drivers/acpi/apei/erst-dbg.c
@@
-213,6
+213,10
@@
static struct miscdevice erst_dbg_dev = {
static __init int erst_dbg_init(void)
{
+ if (erst_disable) {
+ pr_info(ERST_DBG_PFX "ERST support is disabled.\n");
+ return -ENODEV;
+ }
return misc_register(&erst_dbg_dev);
}