linux-kernel - Re: [PATCH 1/1] ACPI/nfit: correct the badrange to be reported in nfit_handle

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Message-ID: <1fa493113c74a0618d34f0e5d88e4402abe3e69c.camel@intel.com>
Date:   Wed, 18 Nov 2020 20:50:56 +0000
From:   "Verma, Vishal L" <vishal.l.verma@...el.com>
To:     "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        "Jiang, Dave" <dave.jiang@...el.com>,
        "lenb@...nel.org" <lenb@...nel.org>,
        "thunder.leizhen@...wei.com" <thunder.leizhen@...wei.com>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Williams, Dan J" <dan.j.williams@...el.com>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        "Weiny, Ira" <ira.weiny@...el.com>
Subject: Re: [PATCH 1/1] ACPI/nfit: correct the badrange to be reported in
 nfit_handle_mce()

On Wed, 2020-11-18 at 16:41 +0800, Zhen Lei wrote:
> The badrange to be reported should always cover mce->addr.
> 
> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
> ---
>  drivers/acpi/nfit/mce.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Ah good find, agreed with Dan that this is stable material.
Minor nit, I'd recommend rewording the subject line to something like:

"acpi/nfit: fix badrange insertion in nfit_handle_mce()"

Otherwise, looks good to me.
Reviewed-by: Vishal Verma <vishal.l.verma@...el.com>

> 
> diff --git a/drivers/acpi/nfit/mce.c b/drivers/acpi/nfit/mce.c
> index ee8d9973f60b..053e719c7bea 100644
> --- a/drivers/acpi/nfit/mce.c
> +++ b/drivers/acpi/nfit/mce.c
> @@ -63,7 +63,7 @@ static int nfit_handle_mce(struct notifier_block *nb, unsigned long val,
>  
>  		/* If this fails due to an -ENOMEM, there is little we can do */
>  		nvdimm_bus_add_badrange(acpi_desc->nvdimm_bus,
> -				ALIGN(mce->addr, L1_CACHE_BYTES),
> +				ALIGN_DOWN(mce->addr, L1_CACHE_BYTES),
>  				L1_CACHE_BYTES);
>  		nvdimm_region_notify(nfit_spa->nd_region,
>  				NVDIMM_REVALIDATE_POISON);