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

[Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>]

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@oss.qualcomm.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.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