linux-kernel - [PATCH] mmc: sdhci: Quirk for broken command queuing on Intel GLK-based Positivo models

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Message-Id: <20250626112442.9791-1-edson.drosdeck@gmail.com>
Date: Thu, 26 Jun 2025 08:24:42 -0300
From: Edson Juliano Drosdeck <edson.drosdeck@...il.com>
To: adrian.hunter@...el.com
Cc: ulf.hansson@...aro.org,
	linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	edson.drosdeck@...il.com
Subject: [PATCH] mmc: sdhci: Quirk for broken command queuing on Intel GLK-based Positivo models

Disable command queuing on Intel GLK-based Positivo models.

Without this quirk, CQE (Command Queuing Engine) causes instability
or I/O errors during operation. Disabling it ensures stable
operation on affected devices.

Signed-off-by: Edson Juliano Drosdeck <edson.drosdeck@...il.com>
---
 drivers/mmc/host/sdhci-pci-core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index 13a84b9309e0..e3877a1c72a9 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -913,7 +913,8 @@ 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") ||
-		dmi_match(DMI_SYS_VENDOR, "IRBIS"));
+		dmi_match(DMI_SYS_VENDOR, "IRBIS") ||
+		dmi_match(DMI_SYS_VENDOR, "Positivo Tecnologia SA"));
 }
 
 static bool jsl_broken_hs400es(struct sdhci_pci_slot *slot)
-- 
2.39.5