The patch below does not apply to the 5.5-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From d2f8bfa4bff5028bc40ed56b4497c32e05b0178f Mon Sep 17 00:00:00 2001
From: Ulf Hansson ulf.hansson@linaro.org Date: Tue, 10 Mar 2020 15:50:11 +0100 Subject: [PATCH] mmc: sdhci-tegra: Fix busy detection by enabling MMC_CAP_NEED_RSP_BUSY
It has turned out that the sdhci-tegra controller requires the R1B response, for commands that has this response associated with them. So, converting from an R1B to an R1 response for a CMD6 for example, leads to problems with the HW busy detection support.
Fix this by informing the mmc core about the requirement, via setting the host cap, MMC_CAP_NEED_RSP_BUSY.
Reported-by: Bitan Biswas bbiswas@nvidia.com Reported-by: Peter Geis pgwipeout@gmail.com Suggested-by: Sowjanya Komatineni skomatineni@nvidia.com Cc: stable@vger.kernel.org Tested-by: Sowjanya Komatineni skomatineni@nvidia.com Tested-By: Peter Geis pgwipeout@gmail.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index 403ac44a7378..a25c3a4d3f6c 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -1552,6 +1552,9 @@ static int sdhci_tegra_probe(struct platform_device *pdev) if (tegra_host->soc_data->nvquirks & NVQUIRK_ENABLE_DDR50) host->mmc->caps |= MMC_CAP_1_8V_DDR;
+ /* R1B responses is required to properly manage HW busy detection. */ + host->mmc->caps |= MMC_CAP_NEED_RSP_BUSY; + tegra_sdhci_parse_dt(host);
tegra_host->power_gpio = devm_gpiod_get_optional(&pdev->dev, "power",