mmc: sdhci-acpi: Disable write protect detection on Acer Aspire Switch 10 (SW5-012) (3397b251) · Commits · 戴 / test

On the Acer Aspire Switch 10 (SW5-012) microSD slot always reports the card being write-protected even though microSD cards do not have a write-protect switch at all. Add a new DMI_QUIRK_SD_NO_WRITE_PROTECT quirk which when set sets the MMC_CAP2_NO_WRITE_PROTECT flag on the controller for the external SD slot; and add a DMI quirk table entry which selects this quirk for the Acer SW5-012. Signed-off-by:

Hans de Goede <hdegoede@redhat.com> Acked-by:

Adrian Hunter <adrian.hunter@intel.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200316184753.393458-2-hdegoede@redhat.com Signed-off-by:

Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-acpi.c

+16 −0

Original line number	Diff line number	Diff line
		@@ -80,6 +80,7 @@ struct sdhci_acpi_host {

		enum {
		DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP = BIT(0),
		DMI_QUIRK_SD_NO_WRITE_PROTECT = BIT(1),
		};

		static inline void sdhci_acpi_priv(struct sdhci_acpi_host c)
		@@ -671,6 +672,18 @@ static const struct dmi_system_id sdhci_acpi_quirks[] = {
		},
		.driver_data = (void *)DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP,
		},
		{
		/*
		* The Acer Aspire Switch 10 (SW5-012) microSD slot always
		* reports the card being write-protected even though microSD
		* cards do not have a write-protect switch at all.
		*/
		.matches = {
		DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
		DMI_MATCH(DMI_PRODUCT_NAME, "Aspire SW5-012"),
		},
		.driver_data = (void *)DMI_QUIRK_SD_NO_WRITE_PROTECT,
		},
		{} /* Terminating entry */
		};

		@@ -795,6 +808,9 @@ static int sdhci_acpi_probe(struct platform_device *pdev)

		if (quirks & DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP)
		c->reset_signal_volt_on_suspend = true;

		if (quirks & DMI_QUIRK_SD_NO_WRITE_PROTECT)
		host->mmc->caps2 \|= MMC_CAP2_NO_WRITE_PROTECT;
		}

		err = sdhci_setup_host(host);

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