Commit 7f34b935 authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Thomas Gleixner
Browse files

x86/mcheck: Be prepared for a rollback back to the ONLINE state

If we try a CPU down and fail in the middle then we roll back to the
online state. This means we would perform CPU_ONLINE / mce_device_create()
without invoking CPU_DEAD / mce_device_remove() for the cleanup of what was
allocated in CPU_ONLINE.

Be prepared for this and don't allocate the struct if we have it

Signed-off-by: default avatarSebastian Andrzej Siewior <>
Acked-by: default avatarBorislav Petkov <>
Cc: Tony Luck <>

Signed-off-by: default avatarThomas Gleixner <>
parent ec553abb
......@@ -2409,6 +2409,10 @@ static int mce_device_create(unsigned int cpu)
if (!mce_available(&boot_cpu_data))
return -EIO;
dev = per_cpu(mce_device, cpu);
if (dev)
return 0;
dev = kzalloc(sizeof *dev, GFP_KERNEL);
if (!dev)
return -ENOMEM;
......@@ -1097,6 +1097,10 @@ static int threshold_create_device(unsigned int cpu)
struct threshold_bank **bp;
int err = 0;
bp = per_cpu(threshold_banks, cpu);
if (bp)
return 0;
bp = kzalloc(sizeof(struct threshold_bank *) * mca_cfg.banks,
if (!bp)
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment