MIPS: MT: Move an assignment for the variable "retval" in mipsmt_sys_sched_setaffinity()

A local variable was set to an error code in one case before a concrete
error situation was detected. Thus move the corresponding assignment into
an if branch to indicate a software failure there.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Cc: LKML <linux-kernel@vger.kernel.org>
Cc: kernel-janitors@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/15072/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/mips-mt-fpaff.c

@@ -99,9 +99,10 @@ asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
 		retval = -ENOMEM;
 		goto out_free_new_mask;
 	}
-	retval = -EPERM;
-	if (!check_same_owner(p) && !capable(CAP_SYS_NICE))
+	if (!check_same_owner(p) && !capable(CAP_SYS_NICE)) {
+		retval = -EPERM;
 		goto out_unlock;
+	}
 
 	retval = security_task_setscheduler(p);
 	if (retval)