From: <gregkh@linuxfoundation.org>
To: ulf.hansson@linaro.org, bbiswas@nvidia.com, pgwipeout@gmail.com,
skomatineni@nvidia.com, stable@vger.kernel.org
Cc: <stable@vger.kernel.org>
Subject: FAILED: patch "[PATCH] mmc: sdhci-tegra: Fix busy detection by enabling" failed to apply to 5.4-stable tree
Date: Mon, 16 Mar 2020 12:32:17 +0100 [thread overview]
Message-ID: <1584358337148226@kroah.com> (raw)
The patch below does not apply to the 5.4-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",
reply other threads:[~2020-03-16 11:32 UTC|newest]
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