linux-kernel - [PATCH 1/5] pci: Add is_pcierc element to struct pci

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Date:	Wed, 15 Jul 2015 09:54:41 -0700
From:	David Daney <ddaney.cavm@...il.com>
To:	linux-arm-kernel@...ts.infradead.org,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>
Cc:	linux-kernel@...r.kernel.org, Robert Richter <rrichter@...ium.com>,
	David Daney <david.daney@...ium.com>
Subject: [PATCH 1/5] pci: Add is_pcierc element to struct pci_bus

From: David Daney <david.daney@...ium.com>

... and use is to force only_one_child() to return true.

Needed because the ThunderX PCIe RC cannot be identified by existing methods.

Signed-off-by: David Daney <david.daney@...ium.com>
---
 drivers/pci/probe.c | 2 ++
 include/linux/pci.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index cefd636..11ec2e7 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1643,6 +1643,8 @@ static int only_one_child(struct pci_bus *bus)
 {
 	struct pci_dev *parent = bus->self;
 
+	if (bus->is_pcierc)
+		return 1;
 	if (!parent || !pci_is_pcie(parent))
 		return 0;
 	if (pci_pcie_type(parent) == PCI_EXP_TYPE_ROOT_PORT)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 8a0321a..1f1ce73 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -473,6 +473,7 @@ struct pci_bus {
 	struct bin_attribute	*legacy_io; /* legacy I/O for this bus */
 	struct bin_attribute	*legacy_mem; /* legacy mem */
 	unsigned int		is_added:1;
+	unsigned int		is_pcierc:1;
 };
 
 #define to_pci_bus(n)	container_of(n, struct pci_bus, dev)
-- 
1.9.1

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