This is a note to let you know that I've just added the patch titled mmc: sdhci-tegra: Issue CMD and DAT resets together to the 6.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mmc-sdhci-tegra-issue-cmd-and-dat-resets-together.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 860ff610c055eeb68c66db4b671ad0098fc1a823 Author: Prathamesh Shete <pshete@xxxxxxxxxx> Date: Tue Dec 6 17:59:45 2022 +0100 mmc: sdhci-tegra: Issue CMD and DAT resets together [ Upstream commit acc13958c2b2623c17e2450b8cd6881b698756d3 ] In case of error condition to avoid system crash Tegra SDMMC controller requires CMD and DAT resets issued together. SDHCI controller FSM goes into bad state due to rapid SD card hot-plug event. Issuing reset on the CMD FSM before DATA FSM results in kernel panic, hence add support to issue CMD and DAT resets together. This is applicable to Tegra186 and later chips. Signed-off-by: Aniruddha TVS Rao <anrao@xxxxxxxxxx> Signed-off-by: Prathamesh Shete <pshete@xxxxxxxxxx> Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> Acked-by: Thierry Reding <treding@xxxxxxxxxx> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx> Link: https://lore.kernel.org/r/20221206165945.3551774-7-thierry.reding@xxxxxxxxx Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index c71000a07656..1adaa94c31ac 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -1526,7 +1526,8 @@ static const struct sdhci_pltfm_data sdhci_tegra186_pdata = { SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC | SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, - .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | + SDHCI_QUIRK2_ISSUE_CMD_DAT_RESET_TOGETHER, .ops = &tegra186_sdhci_ops, }; diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index c7ad32a75b57..632341911b6e 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -270,6 +270,11 @@ enum sdhci_reset_reason { static void sdhci_reset_for_reason(struct sdhci_host *host, enum sdhci_reset_reason reason) { + if (host->quirks2 & SDHCI_QUIRK2_ISSUE_CMD_DAT_RESET_TOGETHER) { + sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); + return; + } + switch (reason) { case SDHCI_RESET_FOR_INIT: sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 87a3aaa07438..5ce7cdcc192f 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -478,6 +478,8 @@ struct sdhci_host { * block count. */ #define SDHCI_QUIRK2_USE_32BIT_BLK_CNT (1<<18) +/* Issue CMD and DATA reset together */ +#define SDHCI_QUIRK2_ISSUE_CMD_DAT_RESET_TOGETHER (1<<19) int irq; /* Device IRQ */ void __iomem *ioaddr; /* Mapped address */