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Message-Id: <20211125124605.25915-4-pali@kernel.org>
Date: Thu, 25 Nov 2021 13:45:53 +0100
From: Pali Rohár <pali@...nel.org>
To: Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Rob Herring <robh@...nel.org>,
Krzysztof Wilczyński <kw@...ux.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Marek Behún <kabel@...nel.org>
Cc: linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 03/15] PCI: mvebu: Check that PCI bridge specified in DT has function number zero
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@...nel.org>
Cc: stable@...r.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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