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| author | Toshi Kani <toshi.kani@hpe.com> | 2017-07-08 02:44:26 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-07-17 21:43:58 +0300 |
| commit | 4e3f0701f25ab194c5362576b1146a1e6cc6c2e7 (patch) | |
| tree | 4ca26b53cd5798187dcd89b6ed0a32d5f2b20a64 /drivers/nvdimm | |
| parent | 5771a8c08880cdca3bfb4a3fc6d309d6bba20877 (diff) | |
| download | linux-4e3f0701f25ab194c5362576b1146a1e6cc6c2e7.tar.xz | |
libnvdimm: fix badblock range handling of ARS range
__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.
Cc: <stable@vger.kernel.org>
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>
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 7cd99b1f8596..75bc08c6838c 100644 --- a/drivers/nvdimm/core.c +++ b/drivers/nvdimm/core.c @@ -421,14 +421,15 @@ 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; |