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mmc: sdhci: Workaround broken command queuing on Intel GLK 

commit bedf9fc01f upstream.

Command queuing has been reported broken on some Lenovo systems based on
Intel GLK. This is likely a BIOS issue, so disable command queuing for
Intel GLK if the BIOS vendor string is "LENOVO".

Fixes: 8ee82bda23 ("mmc: sdhci-pci: Add CQHCI support for Intel GLK")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191217095349.14592-1-adrian.hunter@intel.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Adrian Hunter 2019-12-17 11:53:48 +02:00 committed by Greg Kroah-Hartman
parent d5c5ce6b2f
commit 79a466d43b
1 changed files with 9 additions and 1 deletions
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10
drivers/mmc/host/sdhci-pci-core.c
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@ -26,6 +26,7 @@
#include <linux/mmc/slot-gpio.h>
#include <linux/mmc/sdhci-pci-data.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
#ifdef CONFIG_X86
#include <asm/iosf_mbi.h>
@ -782,11 +783,18 @@ static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot)
return 0;
}
static bool glk_broken_cqhci(struct sdhci_pci_slot *slot)
{
return slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_GLK_EMMC &&
dmi_match(DMI_BIOS_VENDOR, "LENOVO");
}
static int glk_emmc_probe_slot(struct sdhci_pci_slot *slot)
{
int ret = byt_emmc_probe_slot(slot);
slot->host->mmc->caps2 |= MMC_CAP2_CQE;
if (!glk_broken_cqhci(slot))
slot->host->mmc->caps2 |= MMC_CAP2_CQE;
if (slot->chip->pdev->device != PCI_DEVICE_ID_INTEL_GLK_EMMC) {
slot->host->mmc->caps2 |= MMC_CAP2_HS400_ES,