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authorJesse Barnes <jbarnes@virtuousgeek.org>2009-10-08 01:39:46 +0400
committerLen Brown <len.brown@intel.com>2009-10-13 10:53:30 +0400
commit2c907b72db4dd4e8af6dccb6e0ac122d78627b8d (patch)
tree0a980ca3ea0020cc7145b62de382bc5ff2c81daf /drivers/acpi/button.c
parent2906206350b7e13e2047467cc29a0a2d78d71cb2 (diff)
downloadlinux-2c907b72db4dd4e8af6dccb6e0ac122d78627b8d.tar.xz
ACPI button: don't try to use a non-existent lid device
If a call comes in to check the lid state but there's no lid device present, we should return -ENODEV. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/button.c')
-rw-r--r--drivers/acpi/button.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 9335b87c5174..0c9c6a9a002c 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -251,6 +251,9 @@ int acpi_lid_open(void)
acpi_status status;
unsigned long long state;
+ if (!lid_device)
+ return -ENODEV;
+
status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,
&state);
if (ACPI_FAILURE(status))