Introduce the help function imx_pcie_match_device() to facilitate imx_pcie_quirk() in verifying whether the device's bus driver corresponds to the IMX6 PCI controller. This addition lays the groundwork for future support of ITS and IOMMU in the IMX95. Signed-off-by: Frank Li <Frank.Li@xxxxxxx> --- drivers/pci/controller/dwc/pci-imx6.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 5533b7ad0f092..29309ad0e352b 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -1646,17 +1646,25 @@ static struct platform_driver imx_pcie_driver = { .shutdown = imx_pcie_shutdown, }; -static void imx_pcie_quirk(struct pci_dev *dev) +static bool imx_pcie_match_device(struct pci_bus *bus) { - struct pci_bus *bus = dev->bus; - struct dw_pcie_rp *pp = bus->sysdata; - /* Bus parent is the PCI bridge, its parent is this platform driver */ if (!bus->dev.parent || !bus->dev.parent->parent) - return; + return false; /* Make sure we only quirk devices associated with this driver */ if (bus->dev.parent->parent->driver != &imx_pcie_driver.driver) + return false; + + return true; +} + +static void imx_pcie_quirk(struct pci_dev *dev) +{ + struct pci_bus *bus = dev->bus; + struct dw_pcie_rp *pp = bus->sysdata; + + if (!imx_pcie_match_device(bus)) return; if (pci_is_root_bus(bus)) { -- 2.34.1