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authorHuang Ying <ying.huang@intel.com>2011-07-13 13:14:13 +0800
committerLen Brown <len.brown@intel.com>2011-07-13 23:29:52 -0400
commitca7cc5110a313a609da40ae948978a585352564b (patch)
tree1b170de2a91579251e25f7c2eaf20891e20f1622 /drivers/acpi
parent4d2b2956ef1113f1cc43e98e947c20d9c7d2712c (diff)
ACPI, APEI, ERST, Prevent erst_dbg from loading if ERST is disabled
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>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/apei/erst-dbg.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/acpi/apei/erst-dbg.c b/drivers/acpi/apei/erst-dbg.c
index a4cfb64c86a1..cb04aa43c33a 100644
--- 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);
}