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authorChen Yu <yu.c.chen@intel.com>2018-09-21 14:26:38 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-10-03 11:56:33 +0200
commit749fa17093ff67b31dea864531a3698b6a95c26c (patch)
tree11775b001c536b0b174e0dfe1836b51d26646f3b /arch/x86/power
parentcc55f7537db6af371e9c1c6a71161ee40f918824 (diff)
downloadlinux-749fa17093ff67b31dea864531a3698b6a95c26c.tar.bz2
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>
Diffstat (limited to 'arch/x86/power')
-rw-r--r--arch/x86/power/hibernate_64.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/x86/power/hibernate_64.c b/arch/x86/power/hibernate_64.c
index f8e3b668d20b..e0de959ad02d 100644
--- a/arch/x86/power/hibernate_64.c
+++ b/arch/x86/power/hibernate_64.c
@@ -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);
}
/**