Commit a07de9b9 authored Apr 04, 2019 by Borislav Petkov Committed by Greg Kroah-Hartman May 31, 2019

x86/microcode: Fix the ancient deprecated microcode loading method



[ Upstream commit 24613a04ad1c0588c10f4b5403ca60a73d164051 ]

Commit

  2613f36e ("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: 2613f36e ("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


Signed-off-by: Sasha Levin <sashal@kernel.org>

parent a3713f2c

arch/x86/kernel/cpu/microcode/core.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -418,9 +418,10 @@ 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;
		}