PM: suspend: fix return value of __setup handler

[ Upstream commit 7a64ca17e4dd50d5f910769167f3553902777844 ]

If an invalid option is given for "test_suspend=<option>", the entire
string is added to init's environment, so return 1 instead of 0 from
the __setup handler.

  Unknown kernel command line parameters "BOOT_IMAGE=/boot/bzImage-517rc5
    test_suspend=invalid"

and

 Run /sbin/init as init process
   with arguments:
     /sbin/init
   with environment:
     HOME=/
     TERM=linux
     BOOT_IMAGE=/boot/bzImage-517rc5
     test_suspend=invalid

Fixes: 2ce986892faf ("PM / sleep: Enhance test_suspend option with repeat capability")
Fixes: 27ddcc6596e5 ("PM / sleep: Add state field to pm_states[] entries")
Fixes: a9d7052363a6 ("PM: Separate suspend to RAM functionality from core")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/kernel/power/suspend_test.c b/kernel/power/suspend_test.c
index d20526c..b663a97 100644 (file)
--- a/kernel/power/suspend_test.c
+++ b/kernel/power/suspend_test.c
@@ -157,22 +157,22 @@ static int __init setup_test_suspend(char *value)
        value++;
        suspend_type = strsep(&value, ",");
        if (!suspend_type)
-               return 0;
+               return 1;
 
        repeat = strsep(&value, ",");
        if (repeat) {
                if (kstrtou32(repeat, 0, &test_repeat_count_max))
-                       return 0;
+                       return 1;
        }
 
        for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++)
                if (!strcmp(pm_labels[i], suspend_type)) {
                        test_state_label = pm_labels[i];
-                       return 0;
+                       return 1;
                }
 
        printk(warn_bad_state, suspend_type);
-       return 0;
+       return 1;
 }
 __setup("test_suspend", setup_test_suspend);