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authorBorislav Petkov <bp@suse.de>2019-04-04 23:14:07 +0300
committerBorislav Petkov <bp@suse.de>2019-04-10 23:41:24 +0300
commit24613a04ad1c0588c10f4b5403ca60a73d164051 (patch)
treeb4dd0afee3fe78f59d8b58316d514baf34c20952 /arch/x86/kernel/cpu
parent7e94a7b659eefedda82cde97229a26f319fb1182 (diff)
downloadlinux-24613a04ad1c0588c10f4b5403ca60a73d164051.tar.xz
x86/microcode: Fix the ancient deprecated microcode loading method
Commit 2613f36ed965 ("x86/microcode: Attempt late loading only when new microcode is present") added the new define UCODE_NEW to denote that an update should happen only when newer microcode (than installed on the system) has been found. But it missed adjusting that for the old /dev/cpu/microcode loading interface. Fix it. Fixes: 2613f36ed965 ("x86/microcode: Attempt late loading only when new microcode is present") Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jann Horn <jannh@google.com> Link: https://lkml.kernel.org/r/20190405133010.24249-3-bp@alien8.de
Diffstat (limited to 'arch/x86/kernel/cpu')
-rw-r--r--arch/x86/kernel/cpu/microcode/core.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 5260185cbf7b..8a4a7823451a 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -418,8 +418,9 @@ static int do_microcode_update(const void __user *buf, size_t size)
if (ustate == UCODE_ERROR) {
error = -1;
break;
- } else if (ustate == UCODE_OK)
+ } else if (ustate == UCODE_NEW) {
apply_microcode_on_target(cpu);
+ }
}
return error;