linux-kernel - [PATCH] PCI: Add quirk to disable ASPM L1 for Sandisk SN740 NVMe SSDs

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Message-ID: <20251120154601.116806-1-mani@kernel.org>
Date: Thu, 20 Nov 2025 21:16:01 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
To: bhelgaas@...gle.com
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Manivannan Sadhasivam <mani@...nel.org>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: [PATCH] PCI: Add quirk to disable ASPM L1 for Sandisk SN740 NVMe SSDs

The Sandisk SN740 NVMe SSDs cause below AER errors on the upstream Root
Port of PCIe controller in Lenovo Thinkpad T14s laptop when ASPM L1 is
enabled:

  pcieport 0006:00:00.0: AER: Correctable error message received from 0006:01:00.0
  nvme 0006:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (Receiver ID)
  nvme 0006:01:00.0:   device [15b7:5015] error status/mask=00000001/0000e000
  nvme 0006:01:00.0:    [ 0] RxErr

Hence, add a quirk to disable L1 state for this SSD.

Reported-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Signed-off-by: Manivannan Sadhasivam <mani@...nel.org>
---
 drivers/pci/quirks.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 214ed060ca1b..a6f88c5ba2f4 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2525,6 +2525,18 @@ static void quirk_disable_aspm_l0s_l1(struct pci_dev *dev)
  */
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASMEDIA, 0x1080, quirk_disable_aspm_l0s_l1);
 
+static void quirk_disable_aspm_l1(struct pci_dev *dev)
+{
+       pci_info(dev, "Disabling ASPM L1\n");
+       pci_disable_link_state(dev, PCIE_LINK_STATE_L1);
+}
+
+/*
+ * Sandisk SN740 NVMe SSDs cause AER timeout errors on the upstream PCIe Root
+ * Port when ASPM L1 is enabled.
+ */
+DECLARE_PCI_FIXUP_FINAL(0x15b7, 0x5015, quirk_disable_aspm_l1);
+
 /*
  * Some Pericom PCIe-to-PCI bridges in reverse mode need the PCIe Retrain
  * Link bit cleared after starting the link retrain process to allow this
-- 
2.48.1