From: Jaehoon Chung <jh80.chung@samsung.com>
To: Mirza Krak <mirza.krak@hostmobility.com>,
Ulf Hansson <ulf.hansson@linaro.org>
Cc: linux-mmc <linux-mmc@vger.kernel.org>
Subject: Re: MMC card removal during suspend
Date: Thu, 01 Oct 2015 18:43:14 +0900 [thread overview]
Message-ID: <560D0032.4030505@samsung.com> (raw)
In-Reply-To: <CAJ=nTsuy2aD66DSc5kmEi79OjzPsXdOC2bx5-GxS=xy8LMCA=Q@mail.gmail.com>
On 10/01/2015 01:10 AM, Mirza Krak wrote:
> Hi again.
>
> Thank you for your response Ulf.
>
> I am going to start over though since I did not get everything right
> the first time.
>
> As stated I am running the 4.1.5 Linux kernel and what I am actually
> using is a SD card. The host driver is sdhci-esdhc-imx.c.
>
> And my initial issue was that on resume I get the following:
> [ 31.848397] mmc0: card never left busy state
> [ 31.848412] mmc0: error -110 during resume (card was removed?)
> [ 31.848550] PM: resume of devices complete after 2062.936 msecs
> [ 31.931086] PM: Finishing wakeup.
> [ 31.931102] Restarting tasks ... done.
> [ 31.954336] mmc0: card dade removed
> [ 32.358711] mmc0: host does not support reading read-only switch,
> assuming write-enable
> [ 32.391857] mmc0: new SD card at address aaaa
> [ 32.418228] mmcblk0: mmc0:aaaa SU02G 1.84 GiB
> [ 32.446402] mmcblk0: p1
> [ 32.835907] EXT4-fs (mmcblk0p1): recovery complete
> [ 32.840873] EXT4-fs (mmcblk0p1): mounted filesystem with ordered
> data mode. Opts: (null)
>
> And that was the reason of my initial questions on what is supposed to
> happen when suspending.
Almost MMC cards supposed that should be removed. So we are using "non-removable" property in dt-file.
By default, assume that card can be removed.
Since sd-card can be changed during suspend.
(we don't know whether card is changed or not if it doesn't register to wakeup source,)
>
> The card IS actually "removed" when in suspended state since we cut
> the power-rail completely to the SD card.
>
> I assume that this is a sdhci-esdhc-imx issue, but then I wonder what
> would be a proper fix for this.
Sorry, i don't fully understand what problem you want to fix. :)
Best Regards,
Jaehoon Chung
>
> As stated before I get around this problem by adding a HACK to force
> removal of the SD card before suspending in mmc_pm_notify.
>
> Sorry if I am spamming but I am trying to learn :).
>
> Best Regards
>
> Mirza Krak
> --
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> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
prev parent reply other threads:[~2015-10-01 9:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-30 6:46 MMC card removal during suspend Mirza Krak
2015-09-30 10:24 ` Ulf Hansson
2015-09-30 16:10 ` Mirza Krak
2015-10-01 9:39 ` Ulf Hansson
2015-10-01 9:43 ` Jaehoon Chung [this message]
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