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Subject[tip:x86/urgent] input: i8042 - add runtime check in x86's i8042_platform_init
Commit-ID:  5cdfa1c3bbabb809ef3134f741a63e13373a8cad
Gitweb: http://git.kernel.org/tip/5cdfa1c3bbabb809ef3134f741a63e13373a8cad
Author: Feng Tang <feng.tang@intel.com>
AuthorDate: Wed, 7 Jul 2010 13:02:16 -0700
Committer: H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Wed, 7 Jul 2010 17:05:07 -0700

input: i8042 - add runtime check in x86's i8042_platform_init

Then it will first check x86_platforms's i8042 detection result,
then go on with normal probe.

Signed-off-by: Feng Tang <feng.tang@intel.com>
LKML-Reference: <4c34dd482753bb8f1@agluck-desktop.sc.intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
drivers/input/serio/i8042-x86ia64io.h | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h
index 6168469..81003c4 100644
--- a/drivers/input/serio/i8042-x86ia64io.h
+++ b/drivers/input/serio/i8042-x86ia64io.h
@@ -7,6 +7,10 @@
* the Free Software Foundation.
*/

+#ifdef CONFIG_X86
+#include <asm/x86_init.h>
+#endif
+
/*
* Names.
*/
@@ -840,6 +844,12 @@ static int __init i8042_platform_init(void)
{
int retval;

+#ifdef CONFIG_X86
+ /* Just return if pre-detection shows no i8042 controller exist */
+ if (!x86_platform.i8042_detect())
+ return -ENODEV;
+#endif
+
/*
* On ix86 platforms touching the i8042 data register region can do really
* bad things. Because of this the region is always reserved on ix86 boxes.

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