x86/mce: Make sure logged MCEs are processed after sysfs update

commit 1fcbb7c9ce249a322ee032ae50421c02940bc05b upstream.

A recent change introduced a flag to queue up errors found during
boot-time polling. These errors will be processed during late init once
the MCE subsystem is fully set up.

A number of sysfs updates call mce_restart() which goes through a subset
of the CPU init flow. This includes polling MCA banks and logging any
errors found. Since the same function is used as boot-time polling,
errors will be queued. However, the system is now past late init, so the
errors will remain queued until another error is found and the workqueue
is triggered.

Call mce_schedule_work() at the end of mce_restart() so that queued
errors are processed.

Fixes: 1c8d2f770b32 ("x86/mce: Defer processing of early errors")
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230301221420.2203184-1-yazen.ghannam@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 2c8ec5c71712191486000cf3d0e34ebe24f18eb2..e228d58ee26450bc965233a4dfe3fecefb23b72c 100644 (file)
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -2365,6 +2365,7 @@ static void mce_restart(void)
 {
        mce_timer_delete_all();
        on_each_cpu(mce_cpu_restart, NULL, 1);
+       mce_schedule_work();
 }
 
 /* Toggle features for corrected errors */