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

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commit 4c113a5b28 upstream.

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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yazen Ghannam
2025-06-24 14:15:56 +00:00
committed by Greg Kroah-Hartman
parent afcf4f4e70
commit 55ea884c0d
1 changed files with 1 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/x86/kernel/cpu/mce/core.c
+1 -7
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@@ -2756,15 +2756,9 @@ 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;