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| author | Toshi Kani <toshi.kani@hpe.com> | 2017-07-07 17:44:26 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-27 15:08:02 -0700 |
| commit | 0fa705dc61ee12e09827ac19225be3731b1cb988 (patch) | |
| tree | 81cdb0f20ed1cc72256b5b91015fa4a67a0d47e2 /drivers/nvdimm | |
| parent | 891c31e16cb7aab2356625444f3eedebb96cde00 (diff) | |
libnvdimm: fix badblock range handling of ARS range
commit 4e3f0701f25ab194c5362576b1146a1e6cc6c2e7 upstream.
__add_badblock_range() does not account sector alignment when
it sets 'num_sectors'. Therefore, an ARS error record range
spanning across two sectors is set to a single sector length,
which leaves the 2nd sector unprotected.
Change __add_badblock_range() to set 'num_sectors' properly.
Fixes: 0caeef63e6d2 ("libnvdimm: Add a poison list and export badblocks")
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/core.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c index 7ceba08774b6..18a0bea115df 100644 --- a/drivers/nvdimm/core.c +++ b/drivers/nvdimm/core.c @@ -450,14 +450,15 @@ static void set_badblock(struct badblocks *bb, sector_t s, int num) static void __add_badblock_range(struct badblocks *bb, u64 ns_offset, u64 len) { const unsigned int sector_size = 512; - sector_t start_sector; + sector_t start_sector, end_sector; u64 num_sectors; u32 rem; start_sector = div_u64(ns_offset, sector_size); - num_sectors = div_u64_rem(len, sector_size, &rem); + end_sector = div_u64_rem(ns_offset + len, sector_size, &rem); if (rem) - num_sectors++; + end_sector++; + num_sectors = end_sector - start_sector; if (unlikely(num_sectors > (u64)INT_MAX)) { u64 remaining = num_sectors; |