From 7d771333c59bee0ed569fbe39b9b0d18c1253bb7 Mon Sep 17 00:00:00 2001 From: Chen Yu Date: Mon, 25 Nov 2019 11:38:57 +0800 Subject: [PATCH] PM / hibernate: Check the success of generating md5 digest before hibernation [ Upstream commit 749fa17093ff67b31dea864531a3698b6a95c26c ] 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 Acked-by: Pavel Machek Signed-off-by: Chen Yu Acked-by: Thomas Gleixner Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin Signed-off-by: Yang Yingliang --- arch/x86/power/hibernate_64.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/arch/x86/power/hibernate_64.c b/arch/x86/power/hibernate_64.c index c9986041a5e1..6c3ec193a246 100644 --- a/arch/x86/power/hibernate_64.c +++ b/arch/x86/power/hibernate_64.c @@ -266,9 +266,9 @@ static int get_e820_md5(struct e820_table *table, void *buf) 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) @@ -288,8 +288,9 @@ 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) @@ -334,9 +335,7 @@ 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); } /** -- GitLab