From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: linux-mmc@vger.kernel.org,
Adrian Hunter <adrian.hunter@intel.com>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/5] mmc: core: Add support for graceful host removal for eMMC
Date: Mon, 31 Mar 2025 10:23:58 +0200 [thread overview]
Message-ID: <Z-pRHlwL1ntGgUuv@shikoro> (raw)
In-Reply-To: <20250320140040.162416-5-ulf.hansson@linaro.org>
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On Thu, Mar 20, 2025 at 03:00:35PM +0100, Ulf Hansson wrote:
> An mmc host driver may allow to unbind from its corresponding host device.
> If an eMMC card is attached to the host, the mmc core will just try to cut
> the power for it, without obeying to the eMMC spec.
>
> Potentially this may damage the card and it may also prevent us from
> successfully doing a re-initialization of it, which would typically happen
> if/when we try to re-bind the mmc host driver.
>
> To fix these problems, let's implement a graceful power-down of the card at
> host removal.
>
> Reported-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
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next prev parent reply other threads:[~2025-03-31 8:24 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-20 14:00 [PATCH 0/5] mmc: core: Add support for graceful host removal for eMMC/SD Ulf Hansson
2025-03-20 14:00 ` [PATCH 1/5] mmc: core: Convert mmc_can_poweroff_notify() into a bool Ulf Hansson
2025-03-28 13:39 ` Avri Altman
2025-03-31 8:14 ` Wolfram Sang
2025-03-20 14:00 ` [PATCH 2/5] mmc: core: Further avoid re-storing power to the eMMC before a shutdown Ulf Hansson
2025-03-28 13:55 ` Avri Altman
2025-03-31 8:21 ` Wolfram Sang
2025-03-31 9:13 ` Ulf Hansson
2025-03-31 10:46 ` Wolfram Sang
2025-03-31 12:06 ` Ulf Hansson
2025-04-01 6:51 ` Wolfram Sang
2025-04-01 11:50 ` Ulf Hansson
2025-03-20 14:00 ` [PATCH 3/5] mmc: core: Convert into an enum for the poweroff-type for eMMC Ulf Hansson
2025-03-31 8:22 ` Wolfram Sang
2025-03-20 14:00 ` [PATCH 4/5] mmc: core: Add support for graceful host removal " Ulf Hansson
2025-03-28 8:13 ` Avri Altman
2025-03-28 10:21 ` Ulf Hansson
2025-03-31 8:27 ` Wolfram Sang
2025-03-31 8:23 ` Wolfram Sang [this message]
2025-03-20 14:00 ` [PATCH 5/5] mmc: core: Add support for graceful host removal for SD Ulf Hansson
2025-03-31 8:30 ` Wolfram Sang
2025-04-01 8:50 ` Wolfram Sang
2025-04-01 8:51 ` Wolfram Sang
2025-04-01 11:51 ` Ulf Hansson
2025-03-20 15:50 ` [PATCH 0/5] mmc: core: Add support for graceful host removal for eMMC/SD Wolfram Sang
2025-03-31 8:32 ` Wolfram Sang
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