acpi/nfit, x86/mce: Handle only uncorrectable machine checks

The MCE handler for nfit devices is called for memory errors on a
Non-Volatile DIMM and adds the error location to a 'badblocks' list.
This list is used by the various NVDIMM drivers to avoid consuming known
poison locations during IO.

The MCE handler gets called for both corrected and uncorrectable errors.
Until now, both kinds of errors have been added to the badblocks list.
However, corrected memory errors indicate that the problem has already
been fixed by hardware, and the resulting interrupt is merely a
notification to Linux.

As far as future accesses to that location are concerned, it is
perfectly fine to use, and thus doesn't need to be included in the above
badblocks list.

Add a check in the nfit MCE handler to filter out corrected mce events,
and only process uncorrectable errors.

Fixes: 6839a6d96f4e ("nfit: do an ARS scrub on hitting a latent media error")
Reported-by: Omar Avelar <[email protected]>
Signed-off-by: Vishal Verma <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
CC: Arnd Bergmann <[email protected]>
CC: Dan Williams <[email protected]>
CC: Dave Jiang <[email protected]>
CC: [email protected]
CC: "H. Peter Anvin" <[email protected]>
CC: Ingo Molnar <[email protected]>
CC: Len Brown <[email protected]>
CC: [email protected]
CC: linux-edac <[email protected]>
CC: [email protected]
CC: Qiuxu Zhuo <[email protected]>
CC: "Rafael J. Wysocki" <[email protected]>
CC: Ross Zwisler <[email protected]>
CC: stable <[email protected]>
CC: Thomas Gleixner <[email protected]>
CC: Tony Luck <[email protected]>
CC: x86-ml <[email protected]>
CC: Yazen Ghannam <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]

0 files changed, 0 insertions, 0 deletions