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From 978d8acb29959079c59f700fbd9df105147a3c44 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
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 <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 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
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