[PATCH] intel-wmi-thunderbolt: fix some error cases

[Mario Limonciello]

These were raised by Lukas Wunner as potential DOS attacks against
the system log by passing bad data to sysfs.

Signed-off-by: Mario Limonciello <mario.limoncie...@dell.com>
---
 drivers/platform/x86/intel-wmi-thunderbolt.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/intel-wmi-thunderbolt.c 
b/drivers/platform/x86/intel-wmi-thunderbolt.c
index 32fb6cc..c2257bd 100644
--- a/drivers/platform/x86/intel-wmi-thunderbolt.c
+++ b/drivers/platform/x86/intel-wmi-thunderbolt.c
@@ -41,13 +41,10 @@ static ssize_t force_power_store(struct device *dev,
        if (mode == 0 || mode == 1) {
                status = wmi_evaluate_method(INTEL_WMI_THUNDERBOLT_GUID, 0, 1,
                                             &input, NULL);
-               if (ACPI_FAILURE(status)) {
-                       pr_err("intel-wmi-thunderbolt: failed setting %s\n",
-                              buf);
+               if (ACPI_FAILURE(status))
                        return -ENODEV;
-               }
        } else {
-               pr_err("intel-wmi-thunderbolt: unsupported mode: %d", mode);
+               return -EINVAL;
        }
        return count;
 }
-- 
2.7.4