From 978d8acb29959079c59f700fbd9df105147a3c44 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Pali=20Roh=C3=A1r?= Date: Fri, 17 Sep 2021 11:39:48 +0200 Subject: [PATCH 08/90] PCI: mvebu: Check that PCI bridge specified in DT has function number zero MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 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 e4c6dc73159f..b0965067e4ce 100644 --- a/drivers/pci/controller/pci-mvebu.c +++ b/drivers/pci/controller/pci-mvebu.c @@ -946,6 +946,11 @@ 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); -- 2.34.1