[PATCH] PM/hibernate: fix __setup handler error handling

[Randy Dunlap]

If an invalid value is used in "resumedelay=<seconds>", it is
silently ignored. Add a warning message and then let the __setup
handler return 1 to indicate that the kernel command line option
has been handled.

Fixes: 317cf7e5e85e3 ("PM / hibernate: convert simple_strtoul to kstrtoul")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: Igor Zhbanov <i.zhbanov@xxxxxxxxxxxx>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@xxxxxxxxxxxx
Cc: Fabian Frederick <fabf@xxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Cc: linux-pm@xxxxxxxxxxxxxxx
Cc: Len Brown <len.brown@xxxxxxxxx>
---
 kernel/power/hibernate.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-next-20220228.orig/kernel/power/hibernate.c
+++ linux-next-20220228/kernel/power/hibernate.c
@@ -1329,7 +1329,7 @@ static int __init resumedelay_setup(char
 	int rc = kstrtouint(str, 0, &resume_delay);
 
 	if (rc)
-		return rc;
+		pr_warn("resumedelay: bad option string '%s'\n", str);
 	return 1;
 }