frv: kill used but uninitialized variable

Commit 6afe1a1fe8ff ("PM: Remove legacy PM") removed the initialization
of retval, causing:

  arch/frv/kernel/pm.c: In function 'sysctl_pm_do_suspend':
  arch/frv/kernel/pm.c:165:5: warning: 'retval' may be used uninitialized in this function [-Wuninitialized]

Remove the variable completely to fix this, and convert to a proper
switch (...) { ... } construct to improve readability.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 10 deletions

diff --git a/arch/frv/kernel/pm.c b/arch/frv/kernel/pm.c
index 5fa3889d858b..0b579927439d 100644
--- a/arch/frv/kernel/pm.c
+++ b/arch/frv/kernel/pm.c
@@ -153,23 +153,22 @@ static int user_atoi(char __user *ubuf, size_t len)
 static int sysctl_pm_do_suspend(ctl_table *ctl, int write,
                                 void __user *buffer, size_t *lenp, loff_t *fpos)
 {
-        int retval, mode;
+        int mode;
 
         if (*lenp <= 0)
                 return -EIO;
 
         mode = user_atoi(buffer, *lenp);
-        if ((mode != 1) && (mode != 5))
-                return -EINVAL;
+        switch (mode) {
+        case 1:
+            return pm_do_suspend();
 
-        if (retval == 0) {
-                if (mode == 5)
-                    retval = pm_do_bus_sleep();
-                else
-                    retval = pm_do_suspend();
-        }
+        case 5:
+            return pm_do_bus_sleep();
 
-        return retval;
+        default:
+            return -EINVAL;
+        }
 }
 
 static int try_set_cmode(int new_cmode)