ACPI / sysfs: fix error code in get_status()

commit f18ebc211e259d4f591e39e74b2aa2de226c9a1d upstream.

The problem with ornamental, do-nothing gotos is that they lead to
"forgot to set the error code" bugs.  We should be returning -EINVAL
here but we don't.  It leads to an uninitalized variable in
counter_show():

    drivers/acpi/sysfs.c:603 counter_show()
    error: uninitialized symbol 'status'.

Fixes: 1c8fce27e275 (ACPI: introduce drivers/acpi/sysfs.c)
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>

diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index fcae5fa2e1b322481ec2b331c4df0430bff66d53..95b6371e1fe7f1141d1192b553591000df956a03 100644 (file)
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -492,23 +492,22 @@ static void acpi_global_event_handler(u32 event_type, acpi_handle device,
 static int get_status(u32 index, acpi_event_status *status,
                      acpi_handle *handle)
 {
-       int result = 0;
+       int result;
 
        if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
-               goto end;
+               return -EINVAL;
 
        if (index < num_gpes) {
                result = acpi_get_gpe_device(index, handle);
                if (result) {
                        ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
                                        "Invalid GPE 0x%x", index));
-                       goto end;
+                       return result;
                }
                result = acpi_get_gpe_status(*handle, index, status);
        } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
                result = acpi_get_event_status(index - num_gpes, status);
 
-end:
        return result;
 }