[PATCH v4 3/6] PCI: of_property: Add support for NULL pdev in of_pci_set_address()

Herve Codina
2024-12-02T13:15:54Z

The pdev (pointer to a struct pci_dev) parameter of of_pci_set_address()
cannot be NULL.

In order to reuse of_pci_set_address() when creating the PCI root bus
node, this function needs to support a NULL pdev parameter. Indeed, in
the case of the PCI root bus node creation, no pdev are available and
of_pci_set_address() will be used with the bridge windows.

Allow to call of_pci_set_address() with a NULL pdev.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
drivers/pci/of_property.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/of_property.c b/drivers/pci/of_property.c
index 886c236e5de6..8aff9ca1f222 100644
--- a/drivers/pci/of_property.c
+++ b/drivers/pci/of_property.c
@@ -54,9 +54,13 @@ enum of_pci_prop_compatible {
static void of_pci_set_address(struct pci_dev *pdev, u32 *prop, u64 addr,
u32 reg_num, u32 flags, bool reloc)
{
- prop[0] = FIELD_PREP(OF_PCI_ADDR_FIELD_BUS, pdev->bus->number) |
- FIELD_PREP(OF_PCI_ADDR_FIELD_DEV, PCI_SLOT(pdev->devfn)) |
- FIELD_PREP(OF_PCI_ADDR_FIELD_FUNC, PCI_FUNC(pdev->devfn));
+ if (pdev)
+ prop[0] = FIELD_PREP(OF_PCI_ADDR_FIELD_BUS, pdev->bus->number) |
+ FIELD_PREP(OF_PCI_ADDR_FIELD_DEV, PCI_SLOT(pdev->devfn)) |
+ FIELD_PREP(OF_PCI_ADDR_FIELD_FUNC, PCI_FUNC(pdev->devfn));
+ else
+ prop[0] = 0;
+
prop[0] |= flags | reg_num;
if (!reloc) {
prop[0] |= OF_PCI_ADDR_FIELD_NONRELOC;
--
2.47.0