[PATCH 02/17] ACPI, APEI, ERST, Prevent erst_dbg from loading if ERST is disabled

Huang Ying
2011-07-13T05:14:35Z

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>
---
drivers/acpi/apei/erst-dbg.c | 4 ++++
1 file changed, 4 insertions(+)

--- 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);
}