linux-kernel - Re: [PATCH v2 0/2] acpi/nfit: Fix command-supported detection

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Date:   Tue, 15 Jan 2019 09:16:19 -0500
From:   Jeff Moyer <jmoyer@...hat.com>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     linux-nvdimm@...ts.01.org, stable@...r.kernel.org,
        stuart hayes <stuart.w.hayes@...il.com>,
        Sujith Pandel <sujith_pandel@...l.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] acpi/nfit: Fix command-supported detection

Dan Williams <dan.j.williams@...el.com> writes:

> Changes since v1 [1]:
> * Include another patch make sure that function-number zero can be
>   safely used as an invalid function number (Jeff)
> * Add a comment clarifying why zero is an invalid function number (Jeff)
> * Pass nfit_mem to cmd_to_func() (Jeff)
> * Collect a Tested-by from Sujith
> [1]: https://lists.01.org/pipermail/linux-nvdimm/2019-January/019435.html

For the series:

Reviewed-by: Jeff Moyer <jmoyer@...hat.com>

Thanks, Dan!


>
> ---
>
> Quote patch2 changelog:
>
> The _DSM function number validation only happens to succeed when the
> generic Linux command number translation corresponds with a
> DSM-family-specific function number. This breaks NVDIMM-N
> implementations that correctly implement _LSR, _LSW, and _LSI, but do
> not happen to publish support for DSM function numbers 4, 5, and 6.
>
> Recall that the support for _LS{I,R,W} family of methods results in the
> DIMM being marked as supporting those command numbers at
> acpi_nfit_register_dimms() time. The DSM function mask is only used for
> ND_CMD_CALL support of non-NVDIMM_FAMILY_INTEL devices.
>
> ---
>
> Dan Williams (2):
>       acpi/nfit: Block function zero DSMs
>       acpi/nfit: Fix command-supported detection
>
>
>  drivers/acpi/nfit/core.c |   53 ++++++++++++++++++++++++++++++++++------------
>  1 file changed, 39 insertions(+), 14 deletions(-)