The following commit has been merged into the ras/urgent branch of tip:

Commit-ID: 4783b9cb374af02d49740e00e2da19fd4ed6dec4 Gitweb: https://git.kernel.org/tip/4783b9cb374af02d49740e00e2da19fd4ed6dec4 Author: Yazen Ghannam yazen.ghannam@amd.com AuthorDate: Wed, 01 Mar 2023 22:14:20 Committer: Borislav Petkov (AMD) bp@alien8.de CommitterDate: Sun, 12 Mar 2023 21:12:21 +01:00

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

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: 3bff147b187d ("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 --- arch/x86/kernel/cpu/mce/core.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 7832a69..2eec60f 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -2355,6 +2355,7 @@ 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 */