linux-kernel - Re: [PATCH V15 06/22] mmc: block: Add blk-mq support

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Message-ID: <a15e8905-6ca8-d078-d891-58dc2f30f463@gmail.com>
Date:   Tue, 27 Feb 2018 15:04:35 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-mmc <linux-mmc@...r.kernel.org>,
        linux-block <linux-block@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Bough Chen <haibo.chen@....com>,
        Alex Lemberg <alex.lemberg@...disk.com>,
        Mateusz Nowak <mateusz.nowak@...el.com>,
        Yuliy Izrailov <Yuliy.Izrailov@...disk.com>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Dong Aisheng <dongas86@...il.com>,
        Das Asutosh <asutoshd@...eaurora.org>,
        Zhangfei Gao <zhangfei.gao@...il.com>,
        Sahitya Tummala <stummala@...eaurora.org>,
        Harjani Ritesh <riteshh@...eaurora.org>,
        Venu Byravarasu <vbyravarasu@...dia.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Christoph Hellwig <hch@....de>,
        Thierry Reding <treding@...dia.com>,
        Krishna Reddy <vdumpa@...dia.com>
Subject: Re: [PATCH V15 06/22] mmc: block: Add blk-mq support

On 27.02.2018 11:57, Linus Walleij wrote:
> On Mon, Feb 26, 2018 at 10:48 PM, Dmitry Osipenko <digetx@...il.com> wrote:
>> On 22.02.2018 20:54, Dmitry Osipenko wrote:
>>> On 22.02.2018 10:42, Adrian Hunter wrote:
> 
>>>> SDIO (unless it is a combo card) should be unaffected by changes to the
>>>> block driver.
>>
>> I don't know whether it's a combo card or not. Where I can find info about that?
>> Is it mentioned in sysfs somewhere?
> 
> Combo cards were used with very old (2000s) PDAs which had only
> one SD card slot which they wanted to use for WiFi and storage
> at the same time.
> 
> They are very uncommon and I haven't been able to locate any
> even for testing.
> 
> It is very unlikely that you have one.
> 
> However you would notice it from seeing a partition attachment
> message (like with an ordinary SD card) when you plug in your
> card.

Thank you very much for the explanation. It's not a combo card.