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    Subject[PATCH 4.11 083/197] libnvdimm: fix clear length of nvdimm_forget_poison()
    Date
    4.11-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Toshi Kani <toshi.kani@hpe.com>

    commit 8d13c0290655b883df9083a2a0af0d782bc38aef upstream.

    ND_CMD_CLEAR_ERROR command returns 'clear_err.cleared', the length
    of error actually cleared, which may be smaller than its requested
    'len'.

    Change nvdimm_clear_poison() to call nvdimm_forget_poison() with
    'clear_err.cleared' when this value is valid.

    Fixes: e046114af5fc ("libnvdimm: clear the internal poison_list when clearing badblocks")
    Cc: Dave Jiang <dave.jiang@intel.com>
    Cc: Vishal Verma <vishal.l.verma@intel.com>
    Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
    Signed-off-by: Dan Williams <dan.j.williams@intel.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/nvdimm/bus.c | 5 ++++-
    1 file changed, 4 insertions(+), 1 deletion(-)

    --- a/drivers/nvdimm/bus.c
    +++ b/drivers/nvdimm/bus.c
    @@ -218,7 +218,10 @@ long nvdimm_clear_poison(struct device *
    if (cmd_rc < 0)
    return cmd_rc;

    - nvdimm_clear_from_poison_list(nvdimm_bus, phys, len);
    + if (clear_err.cleared > 0)
    + nvdimm_clear_from_poison_list(nvdimm_bus, phys,
    + clear_err.cleared);
    +
    return clear_err.cleared;
    }
    EXPORT_SYMBOL_GPL(nvdimm_clear_poison);

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