The patch below does not apply to the 5.2-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 c6303c5d52d5ec3e5bce2e6a5480fa2a1baa45e6 Mon Sep 17 00:00:00 2001

From: Baolin Wang baolin.wang@linaro.org Date: Thu, 25 Jul 2019 11:14:22 +0800 Subject: [PATCH] mmc: sdhci-sprd: Fix the incorrect soft reset operation when runtime resuming

The SD host controller specification defines 3 types software reset: software reset for data line, software reset for command line and software reset for all. Software reset for all means this reset affects the entire Host controller except for the card detection circuit.

In sdhci_runtime_resume_host() we always do a software "reset for all", which causes the Spreadtrum variant controller to work abnormally after resuming. To fix the problem, let's do a software reset for the data and the command part, rather than "for all".

However, as sdhci_runtime_resume() is a common sdhci function and we don't want to change the behaviour for other variants, let's introduce a new in-parameter for it. This enables the caller to decide if a "reset for all" shall be done or not.

Signed-off-by: Baolin Wang baolin.wang@linaro.org Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson ulf.hansson@linaro.org

diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c index b3a130a9ee23..1604f512c7bd 100644 --- a/drivers/mmc/host/sdhci-acpi.c +++ b/drivers/mmc/host/sdhci-acpi.c @@ -883,7 +883,7 @@ static int sdhci_acpi_runtime_resume(struct device *dev)

sdhci_acpi_byt_setting(&c->pdev->dev);

- return sdhci_runtime_resume_host(c->host); + return sdhci_runtime_resume_host(c->host, 0); }

#endif diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index c391510e9ef4..776a94216248 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -1705,7 +1705,7 @@ static int sdhci_esdhc_runtime_resume(struct device *dev) esdhc_pltfm_set_clock(host, imx_data->actual_clock); }

- err = sdhci_runtime_resume_host(host); + err = sdhci_runtime_resume_host(host, 0); if (err) goto disable_ipg_clk;

diff --git a/drivers/mmc/host/sdhci-of-at91.c b/drivers/mmc/host/sdhci-of-at91.c index e377b9bc55a4..d4e7e8b7be77 100644 --- a/drivers/mmc/host/sdhci-of-at91.c +++ b/drivers/mmc/host/sdhci-of-at91.c @@ -289,7 +289,7 @@ static int sdhci_at91_runtime_resume(struct device *dev) }

out: - return sdhci_runtime_resume_host(host); + return sdhci_runtime_resume_host(host, 0); } #endif /* CONFIG_PM */

diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c index 4041878eb0f3..7d06e2860c36 100644 --- a/drivers/mmc/host/sdhci-pci-core.c +++ b/drivers/mmc/host/sdhci-pci-core.c @@ -167,7 +167,7 @@ static int sdhci_pci_runtime_suspend_host(struct sdhci_pci_chip *chip)

err_pci_runtime_suspend: while (--i >= 0) - sdhci_runtime_resume_host(chip->slots[i]->host); + sdhci_runtime_resume_host(chip->slots[i]->host, 0); return ret; }

@@ -181,7 +181,7 @@ static int sdhci_pci_runtime_resume_host(struct sdhci_pci_chip *chip) if (!slot) continue;

- ret = sdhci_runtime_resume_host(slot->host); + ret = sdhci_runtime_resume_host(slot->host, 0); if (ret) return ret; } diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c index 3ddecf479295..e55037ceda73 100644 --- a/drivers/mmc/host/sdhci-pxav3.c +++ b/drivers/mmc/host/sdhci-pxav3.c @@ -554,7 +554,7 @@ static int sdhci_pxav3_runtime_resume(struct device *dev) if (!IS_ERR(pxa->clk_core)) clk_prepare_enable(pxa->clk_core);

- return sdhci_runtime_resume_host(host); + return sdhci_runtime_resume_host(host, 0); } #endif

diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c index 8e4a8ba33f05..f5753aef7151 100644 --- a/drivers/mmc/host/sdhci-s3c.c +++ b/drivers/mmc/host/sdhci-s3c.c @@ -745,7 +745,7 @@ static int sdhci_s3c_runtime_resume(struct device *dev) clk_prepare_enable(busclk); if (ourhost->cur_clk >= 0) clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]); - ret = sdhci_runtime_resume_host(host); + ret = sdhci_runtime_resume_host(host, 0); return ret; } #endif diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c index 603a5d9f045a..83a4767ca680 100644 --- a/drivers/mmc/host/sdhci-sprd.c +++ b/drivers/mmc/host/sdhci-sprd.c @@ -696,7 +696,7 @@ static int sdhci_sprd_runtime_resume(struct device *dev) if (ret) goto clk_disable;

- sdhci_runtime_resume_host(host); + sdhci_runtime_resume_host(host, 1); return 0;

clk_disable: diff --git a/drivers/mmc/host/sdhci-xenon.c b/drivers/mmc/host/sdhci-xenon.c index 8a18f14cf842..1dea1ba66f7b 100644 --- a/drivers/mmc/host/sdhci-xenon.c +++ b/drivers/mmc/host/sdhci-xenon.c @@ -638,7 +638,7 @@ static int xenon_runtime_resume(struct device *dev) priv->restore_needed = false; }

- ret = sdhci_runtime_resume_host(host); + ret = sdhci_runtime_resume_host(host, 0); if (ret) goto out; return 0; diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 59acf8e3331e..a5dc5aae973e 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -3320,7 +3320,7 @@ int sdhci_runtime_suspend_host(struct sdhci_host *host) } EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host);

-int sdhci_runtime_resume_host(struct sdhci_host *host) +int sdhci_runtime_resume_host(struct sdhci_host *host, int soft_reset) { struct mmc_host *mmc = host->mmc; unsigned long flags; @@ -3331,7 +3331,7 @@ int sdhci_runtime_resume_host(struct sdhci_host *host) host->ops->enable_dma(host); }

- sdhci_init(host, 0); + sdhci_init(host, soft_reset);

if (mmc->ios.power_mode != MMC_POWER_UNDEFINED && mmc->ios.power_mode != MMC_POWER_OFF) { diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 89fd96596a1f..902f855efe8f 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -781,7 +781,7 @@ void sdhci_adma_write_desc(struct sdhci_host *host, void **desc, int sdhci_suspend_host(struct sdhci_host *host); int sdhci_resume_host(struct sdhci_host *host); int sdhci_runtime_suspend_host(struct sdhci_host *host); -int sdhci_runtime_resume_host(struct sdhci_host *host); +int sdhci_runtime_resume_host(struct sdhci_host *host, int soft_reset); #endif

void sdhci_cqe_enable(struct mmc_host *mmc);