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libnvdimm, pmem: Fix memcpy_mcsafe() return code handling in nsio_rw_bytes() 

Commit 60622d6822 "x86/asm/memcpy_mcsafe: Return bytes remaining"
converted callers of memcpy_mcsafe() to expect a positive 'bytes
remaining' value rather than a negative error code. The nsio_rw_bytes()
conversion failed to return success. The failure is benign in that
nsio_rw_bytes() will end up writing back what it just read.

Fixes: 60622d6822 ("x86/asm/memcpy_mcsafe: Return bytes remaining")
Cc: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2018-06-18 10:07:35 -07:00
parent 7daf201d7f
commit b62cc6fdd7
1 changed files with 1 additions and 0 deletions
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drivers/nvdimm/claim.c
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@ -278,6 +278,7 @@ static int nsio_rw_bytes(struct nd_namespace_common *ndns,
return -EIO;
if (memcpy_mcsafe(buf, nsio->addr + offset, size) != 0)
return -EIO;
return 0;
}
if (unlikely(is_bad_pmem(&nsio->bb, sector, sz_align))) {