Commit bedf9fc0 authored by Adrian Hunter's avatar Adrian Hunter Committed by Ulf Hansson

mmc: sdhci: Workaround broken command queuing on Intel GLK

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: 8ee82bda ("mmc: sdhci-pci: Add CQHCI support for Intel GLK")
Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191217095349.14592-1-adrian.hunter@intel.comSigned-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent fe0acab4
...@@ -27,6 +27,7 @@ ...@@ -27,6 +27,7 @@
#include <linux/mmc/slot-gpio.h> #include <linux/mmc/slot-gpio.h>
#include <linux/mmc/sdhci-pci-data.h> #include <linux/mmc/sdhci-pci-data.h>
#include <linux/acpi.h> #include <linux/acpi.h>
#include <linux/dmi.h>
#ifdef CONFIG_X86 #ifdef CONFIG_X86
#include <asm/iosf_mbi.h> #include <asm/iosf_mbi.h>
...@@ -783,11 +784,18 @@ static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot) ...@@ -783,11 +784,18 @@ static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot)
return 0; 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) static int glk_emmc_probe_slot(struct sdhci_pci_slot *slot)
{ {
int ret = byt_emmc_probe_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) { if (slot->chip->pdev->device != PCI_DEVICE_ID_INTEL_GLK_EMMC) {
slot->host->mmc->caps2 |= MMC_CAP2_HS400_ES, slot->host->mmc->caps2 |= MMC_CAP2_HS400_ES,
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment