linux-kernel - [PATCH 0/5] mmc: core: Add support for graceful host removal for eMMC/SD

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Message-ID: <20250320140040.162416-1-ulf.hansson@linaro.org>
Date: Thu, 20 Mar 2025 15:00:31 +0100
From: Ulf Hansson <ulf.hansson@...aro.org>
To: linux-mmc@...r.kernel.org,
	Ulf Hansson <ulf.hansson@...aro.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
	linux-renesas-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/5] mmc: core: Add support for graceful host removal for eMMC/SD

As pointed out by Wolfram Sang and already discussed at LKML [1] - an mmc host
driver may allow to unbind from its corresponding host device. If there is and
eMMC/SD card attached to the host, the mmc core will just try to cut the power
for it, without trying to make a graceful power-off, thus potentially we could
damage the card.

This series intends to fix this problem for eMMC/SD cards.

Please help to test and review!

Kind regards
Ulf Hansson

[1]
https://lore.kernel.org/all/20241007093447.33084-2-wsa+renesas@sang-engineering.com/

Ulf Hansson (5):
  mmc: core: Convert mmc_can_poweroff_notify() into a bool
  mmc: core: Further avoid re-storing power to the eMMC before a
    shutdown
  mmc: core: Convert into an enum for the poweroff-type for eMMC
  mmc: core: Add support for graceful host removal for eMMC
  mmc: core: Add support for graceful host removal for SD

 drivers/mmc/core/mmc.c | 66 +++++++++++++++++++++++++++++-------------
 drivers/mmc/core/sd.c  | 25 +++++++++-------
 2 files changed, 61 insertions(+), 30 deletions(-)

-- 
2.43.0