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charset="utf-8" The PERST (PERST#) GPIO interrupt is only registered when the controller is operating in Endpoint mode. In Root Port mode, the PERST GPIO is configured as an output to control downstream devices, and no interrupt is registered for it. Currently, tegra_pcie_dw_stop_link() unconditionally calls disable_irq() on pex_rst_irq, which causes issues in Root Port mode where this IRQ is not registered. Fix this by only disabling the PERST IRQ when operating in Endpoint mode, where the interrupt is actually registered and used to detect PERST assertion/deassertion from the host. Fixes: c57247f940e8 ("PCI: tegra: Add support for PCIe endpoint mode in Teg= ra194") Signed-off-by: Manikanta Maddireddy --- V5: * None V4: * None V3: * None V2: * None drivers/pci/controller/dwc/pcie-tegra194.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/contr= oller/dwc/pcie-tegra194.c index bc9a66ba53e2..80da5a032bd4 100644 --- a/drivers/pci/controller/dwc/pcie-tegra194.c +++ b/drivers/pci/controller/dwc/pcie-tegra194.c @@ -1028,7 +1028,8 @@ static void tegra_pcie_dw_stop_link(struct dw_pcie *p= ci) { struct tegra_pcie_dw *pcie =3D to_tegra_pcie(pci); =20 - disable_irq(pcie->pex_rst_irq); + if (pcie->of_data->mode =3D=3D DW_PCIE_EP_TYPE) + disable_irq(pcie->pex_rst_irq); } =20 static const struct dw_pcie_ops tegra_dw_pcie_ops =3D { --=20 2.34.1