Toshi Kani <toshi.kani@xxxxxxx> writes:
> pmem_attach_disk() calls nvdimm_badblocks_populate() with resource
> range uninitialized in the case of raw mode. This leads the pmem
> driver to hit MCE despite of ARS reporting the range bad.
>
> Initialize 'bb_res' for raw mode.
>
> Fixes: e8d513483300 ("memremap: change devm_memremap_pages interface to use struct dev_pagemap")
> Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx>
> Cc: Christoph Hellwig <hch@xxxxxx>
> Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Jeff Moyer <jmoyer@xxxxxxxxxx>
> ---
> drivers/nvdimm/pmem.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
> index 9d714926ecf5..2d7875209bce 100644
> --- a/drivers/nvdimm/pmem.c
> +++ b/drivers/nvdimm/pmem.c
> @@ -367,9 +367,11 @@ static int pmem_attach_disk(struct device *dev,
> addr = devm_memremap_pages(dev, &pmem->pgmap);
> pmem->pfn_flags |= PFN_MAP;
> memcpy(&bb_res, &pmem->pgmap.res, sizeof(bb_res));
> - } else
> + } else {
> addr = devm_memremap(dev, pmem->phys_addr,
> pmem->size, ARCH_MEMREMAP_PMEM);
> + memcpy(&bb_res, res, sizeof(bb_res));
> + }
>
> /*
> * At release time the queue must be frozen before
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