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Message-ID: <20241104172001.165640-4-herve.codina@bootlin.com>
Date: Mon, 4 Nov 2024 18:19:57 +0100
From: Herve Codina <herve.codina@...tlin.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Rob Herring <robh@...nel.org>,
Saravana Kannan <saravanak@...gle.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Lizhi Hou <lizhi.hou@....com>
Cc: linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org,
linux-pci@...r.kernel.org,
Allan Nielsen <allan.nielsen@...rochip.com>,
Horatiu Vultur <horatiu.vultur@...rochip.com>,
Steen Hegelund <steen.hegelund@...rochip.com>,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
Herve Codina <herve.codina@...tlin.com>
Subject: [PATCH 3/6] PCI: of_property: Add support for NULL pdev in of_pci_set_address()
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@...tlin.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 5a0b98e69795..59cc5c851fc3 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;
--
2.46.2
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