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Subject[PATCH] PM/hibernate: fix __setup handler error handling
Date
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@infradead.org>
Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
Cc: Fabian Frederick <fabf@skynet.be>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: linux-pm@vger.kernel.org
Cc: Len Brown <len.brown@intel.com>
---
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;
}

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