linux-kernel - Re: [PATCH v3 0/2] mmc: core: Add SD Discard support

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Date:   Wed, 27 Feb 2019 10:39:53 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Avri Altman <avri.altman@....com>
Cc:     "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Avi Shchislowski <avi.shchislowski@....com>,
        Alex Lemberg <alex.lemberg@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 0/2] mmc: core: Add SD Discard support

On Tue, 26 Feb 2019 at 16:10, Avri Altman <avri.altman@....com> wrote:
>
> SD spec v5.1 adds discard support. The flows and commands matches those
> in eMMC, Which leaves to set the appropriate discard arg in CMD38 if
> DISCARD_SUPPORT (b313) is set in the SD_STATUS register.
>
> We set this arg on card init: not in mmc_init_erase as one might expect
> but arbitrarily once the card indicated its discard support.  This is
> because unlike erase, it doesn't really involve any logic, and we want
> to avoid the unnecessary complication.
>
> V2->v3:
> The first 2 patches in the series got accepted.
> Elaborate the changelog of some of the differences between discard and
> erase. Clean some inconsistency in arg checking in mmc_erase().
> Add a patch to set the timeout for sd discard.
>
> V1->v2:
> In the first patch, assign the discard arg for SD cards as well to keep
> the code consistent. Rename "discard_arg" to "erase_arg", and elaborate
> the change log.
>
>
> Avri Altman (2):
>   mmc: core: Add discard support to sd
>   mmc: core: Add sd discard timeout
>
>  drivers/mmc/core/core.c | 15 +++++++++++----
>  drivers/mmc/core/sd.c   | 10 +++++++++-
>  include/linux/mmc/sd.h  |  1 +
>  3 files changed, 21 insertions(+), 5 deletions(-)
>
> --
> 1.9.1
>

Looks good, applied for next, thanks!

Kind regards
Uffe