ACPI sysfs.c strlen fix

commit 9f132652d94c96476b0b0a8caf0c10e96ab10fa8 upstream.

Current code is ignoring the last character of "enable" and "disable"
in comparisons.

https://bugzilla.kernel.org/show_bug.cgi?id=33732

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 9f66181..240a244 100644 (file)
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -173,7 +173,7 @@ static int param_set_trace_state(const char *val, struct kernel_param *kp)
 {
        int result = 0;
 
-       if (!strncmp(val, "enable", strlen("enable") - 1)) {
+       if (!strncmp(val, "enable", strlen("enable"))) {
                result = acpi_debug_trace(trace_method_name, trace_debug_level,
                                          trace_debug_layer, 0);
                if (result)
@@ -181,7 +181,7 @@ static int param_set_trace_state(const char *val, struct kernel_param *kp)
                goto exit;
        }
 
-       if (!strncmp(val, "disable", strlen("disable") - 1)) {
+       if (!strncmp(val, "disable", strlen("disable"))) {
                int name = 0;
                result = acpi_debug_trace((char *)&name, trace_debug_level,
                                          trace_debug_layer, 0);