[PATCH 03/15] PCI: mvebu: Check that PCI bridge specified in DT has function number zero
From: Pali Rohár <pali@kernel.org>
Date: 2021-11-25 12:48:40
Also in:
linux-pci, lkml
Subsystem:
pci driver for mvebu (marvell armada 370 and armada xp soc support), pci native host bridge and endpoint drivers, pci subsystem, the rest · Maintainers:
Thomas Petazzoni, Pali Rohár, Lorenzo Pieralisi, Krzysztof Wilczyński, Manivannan Sadhasivam, Bjorn Helgaas, Linus Torvalds
Driver cannot handle PCI bridges at non-zero function address. So add appropriate check. Currently all in-tree kernel DTS files set PCI bridge function to zero. Signed-off-by: Pali Rohár <pali@kernel.org> Cc: stable@vger.kernel.org --- drivers/pci/controller/pci-mvebu.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c
index 6197f7e7c317..08274132cdfb 100644
--- a/drivers/pci/controller/pci-mvebu.c
+++ b/drivers/pci/controller/pci-mvebu.c@@ -864,6 +864,11 @@ static int mvebu_pcie_parse_port(struct mvebu_pcie *pcie, port->devfn = of_pci_get_devfn(child); if (port->devfn < 0) goto skip; + if (PCI_FUNC(port->devfn) != 0) { + dev_err(dev, "%s: invalid function number, must be zero\n", + port->name); + goto skip; + } ret = mvebu_get_tgt_attr(dev->of_node, port->devfn, IORESOURCE_MEM, &port->mem_target, &port->mem_attr);
--
2.20.1
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