linux-kernel - Re: [PATCH] libnvdimm: fix phys_addr for nvdimm_clear

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Date:   Tue, 25 Apr 2017 15:44:22 -0600
From:   Vishal Verma <vishal.l.verma@...el.com>
To:     Toshi Kani <toshi.kani@....com>
Cc:     dan.j.williams@...el.com, dave.jiang@...el.com,
        linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] libnvdimm: fix phys_addr for nvdimm_clear_poison

On 04/25, Toshi Kani wrote:
> nvdimm_clear_poison() expects a physical address, not an offset.
> Fix nsio_rw_bytes() to call nvdimm_clear_poison() with a physical
> address.

Good catch!

> 
> Signed-off-by: Toshi Kani <toshi.kani@....com>
> Cc: Dan Williams <dan.j.williams@...el.com>
> Cc: Dave Jiang <dave.jiang@...el.com>
> Cc: Vishal Verma <vishal.l.verma@...el.com>
> ---
>  drivers/nvdimm/claim.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/nvdimm/claim.c b/drivers/nvdimm/claim.c
> index ca6d572..0b31073 100644
> --- a/drivers/nvdimm/claim.c
> +++ b/drivers/nvdimm/claim.c
> @@ -254,7 +254,8 @@ static int nsio_rw_bytes(struct nd_namespace_common *ndns,
>  				&& (!ndns->claim || !is_nd_btt(ndns->claim))) {
>  			long cleared;
>  
> -			cleared = nvdimm_clear_poison(&ndns->dev, offset, size);
> +			cleared = nvdimm_clear_poison(&ndns->dev,
> +					nsio->res.start + offset, size);

Should we be using nsio->res.start here or nsio->addr ?

>  			if (cleared < size)
>  				rc = -EIO;
>  			if (cleared > 0 && cleared / 512) {