USB: cdc_acm: Fix memory leak after hangup

[safe/jmp/linux-2.6] / drivers / acpi / button.c

diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index ebb593e..0c9c6a9 100644 (file)
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -33,6 +33,8 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
+#define PREFIX "ACPI: "
+
 #define ACPI_BUTTON_CLASS              "button"
 #define ACPI_BUTTON_FILE_INFO          "info"
 #define ACPI_BUTTON_FILE_STATE         "state"
@@ -249,6 +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))