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PM / hibernate: Check the success of generating md5 digest before hibernation 

Currently if get_e820_md5() fails, then it will hibernate nevertheless.
Actually the error code should be propagated to upper caller so that
the hibernation could be aware of the result and terminates the process
if md5 digest fails.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Chen Yu 2018-09-21 14:26:38 +08:00 committed by Rafael J. Wysocki
parent cc55f7537d
commit 749fa17093
1 changed files with 5 additions and 6 deletions
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11
arch/x86/power/hibernate_64.c
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@ -265,9 +265,9 @@ free_tfm:
return ret;
}
static void hibernation_e820_save(void *buf)
static int hibernation_e820_save(void *buf)
{
get_e820_md5(e820_table_firmware, buf);
return get_e820_md5(e820_table_firmware, buf);
}
static bool hibernation_e820_mismatch(void *buf)
@ -287,8 +287,9 @@ static bool hibernation_e820_mismatch(void *buf)
return memcmp(result, buf, MD5_DIGEST_SIZE) ? true : false;
}
#else
static void hibernation_e820_save(void *buf)
static int hibernation_e820_save(void *buf)
{
return 0;
}
static bool hibernation_e820_mismatch(void *buf)
@ -333,9 +334,7 @@ int arch_hibernation_header_save(void *addr, unsigned int max_size)
rdr->magic = RESTORE_MAGIC;
hibernation_e820_save(rdr->e820_digest);
return 0;
return hibernation_e820_save(rdr->e820_digest);
}
/**