[PATCH v2 0/7] mmc: sdhci controllers: Fix SDHCI_RESET_ALL for CQHCI

From: Brian Norris <briannorris@chromium.org>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Shawn Lin <shawn.lin@rock-chips.com>,
	Shawn Guo <shawnguo@kernel.org>,
	Fabio Estevam <festevam@gmail.com>,
	Haibo Chen <haibo.chen@nxp.com>,
	Broadcom internal kernel review list
	<bcm-kernel-feedback-list@broadcom.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Michal Simek <michal.simek@xilinx.com>,
	Faiz Abbas <faiz_abbas@ti.com>,
	linux-mmc@vger.kernel.org, Jonathan Hunter <jonathanh@nvidia.com>,
	Al Cooper <alcooperx@gmail.com>,
	linux-arm-kernel@lists.infradead.org,
	Sowjanya Komatineni <skomatineni@nvidia.com>,
	linux-kernel@vger.kernel.org,
	Thierry Reding <thierry.reding@gmail.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Brian Norris <briannorris@chromium.org>
Subject: [PATCH v2 0/7] mmc: sdhci controllers: Fix SDHCI_RESET_ALL for CQHCI
Date: Wed, 19 Oct 2022 14:54:33 -0700	[thread overview]
Message-ID: <20221019215440.277643-1-briannorris@chromium.org> (raw)

This is a series of nearly identical fixes for several SDHCI host
drivers. Patch #2 (for sdhci-of-arasan; plus its dependency in patch #1)
is the only one I've tested, and I wrote it due to a bug described
there.

I then noticed that several other drivers do the same thing, and that
commit df57d73276b8 ("mmc: sdhci-pci: Fix SDHCI_RESET_ALL for CQHCI for
Intel GLK-based controllers") points out the likely-repeated bug.

Thus, I include additional patches (compile-tested only) that apply
similar fixes to the other drivers which call cqhci_init() but not
cqhci_deactivate(). They contain appropriate disclaimers and the
relevant parties are CC'd. I would suggest only merging them if you get
some kind of ACK from people familiar with the relevant hardware.

Notably, I do *not* patch drivers/mmc/host/mtk-sd.c although it uses
CQHCI, because it doesn't seem to be an SDHCI-based controller, and so
even if it has a similar bug, it's not clear to me how to patch it.

- Brian

Changes in v2:
 - Rely on cqhci_deactivate() to safely handle (ignore)
   not-yet-initialized CQE support

Brian Norris (7):
  mmc: cqhci: Handle deactivate() when not yet initialized
  mmc: sdhci-of-arasan: Fix SDHCI_RESET_ALL for CQHCI
  mmc: sdhci-brcmstb: Fix SDHCI_RESET_ALL for CQHCI
  mms: sdhci-esdhc-imx: Fix SDHCI_RESET_ALL for CQHCI
  mmc: sdhci-tegra: Fix SDHCI_RESET_ALL for CQHCI
  mmc: sdhci_am654: Fix SDHCI_RESET_ALL for CQHCI
  mmc: sdhci-pci-*: Drop redundant ->cqe_private check

 drivers/mmc/host/cqhci-core.c      | 2 +-
 drivers/mmc/host/sdhci-brcmstb.c   | 3 +++
 drivers/mmc/host/sdhci-esdhc-imx.c | 3 +++
 drivers/mmc/host/sdhci-of-arasan.c | 3 +++
 drivers/mmc/host/sdhci-pci-core.c  | 3 +--
 drivers/mmc/host/sdhci-pci-gli.c   | 3 +--
 drivers/mmc/host/sdhci-tegra.c     | 3 +++
 drivers/mmc/host/sdhci_am654.c     | 3 +++
 8 files changed, 18 insertions(+), 5 deletions(-)

-- 
2.38.0.413.g74048e4d9e-goog

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