linux-kernel - [PATCH 01/19] ACPI, APEI, ERST, Prevent erst

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Date:	Tue, 02 Aug 2011 18:14:34 -0400
From:	Len Brown <lenb@...nel.org>
To:	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Cc:	Huang Ying <ying.huang@...el.com>, Len Brown <len.brown@...el.com>
Subject: [PATCH 01/19] ACPI, APEI, ERST,
 Prevent erst_dbg from loading if ERST is disabled

From: Huang Ying <ying.huang@...el.com>

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@...el.com>
Signed-off-by: Len Brown <len.brown@...el.com>
---
 drivers/acpi/apei/erst-dbg.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/apei/erst-dbg.c b/drivers/acpi/apei/erst-dbg.c
index a4cfb64..cb04aa4 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);
 }
 
-- 
1.7.6.396.ge0613

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