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

Commit-ID: 4c113a5b28bfd589e2010b5fc8867578b0135ed7 Gitweb: https://git.kernel.org/tip/4c113a5b28bfd589e2010b5fc8867578b0135ed7 Author: Yazen Ghannam yazen.ghannam@amd.com AuthorDate: Tue, 24 Jun 2025 14:15:56 Committer: Borislav Petkov (AMD) bp@alien8.de CommitterDate: Thu, 26 Jun 2025 17:28:13 +02:00

x86/mce: Don't remove sysfs if thresholding sysfs init fails

Currently, the MCE subsystem sysfs interface will be removed if the thresholding sysfs interface fails to be created. A common failure is due to new MCA bank types that are not recognized and don't have a short name set.

The MCA thresholding feature is optional and should not break the common MCE sysfs interface. Also, new MCA bank types are occasionally introduced, and updates will be needed to recognize them. But likewise, this should not break the common sysfs interface.

Keep the MCE sysfs interface regardless of the status of the thresholding sysfs interface.

Signed-off-by: Yazen Ghannam yazen.ghannam@amd.com Signed-off-by: Borislav Petkov (AMD) bp@alien8.de Reviewed-by: Qiuxu Zhuo qiuxu.zhuo@intel.com Reviewed-by: Tony Luck tony.luck@intel.com Tested-by: Tony Luck tony.luck@intel.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/20250624-wip-mca-updates-v4-1-236dd74f645f@amd.com --- arch/x86/kernel/cpu/mce/core.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index e9b3c5d..07d6193 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -2801,15 +2801,9 @@ static int mce_cpu_dead(unsigned int cpu) static int mce_cpu_online(unsigned int cpu) { struct timer_list *t = this_cpu_ptr(&mce_timer); - int ret;

mce_device_create(cpu); - - ret = mce_threshold_create_device(cpu); - if (ret) { - mce_device_remove(cpu); - return ret; - } + mce_threshold_create_device(cpu); mce_reenable_cpu(); mce_start_timer(t); return 0;