linux-kernel - [RFC 3/4] arm64: Do not call enable PCI resources when specify PCI_PROBE

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Date:	Sun, 28 Sep 2014 15:53:29 -0500
From:	<suravee.suthikulpanit@....com>
To:	<will.deacon@....com>, <liviu.dudau@....com>,
	<marc.zyngier@....com>, <mark.rutland@....com>,
	<catalin.marinas@....com>, <jason@...edaemon.net>,
	<tglx@...utronix.de>, <robh+dt@...nel.org>, <bhelgaas@...gle.com>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
	<linux-doc@...r.kernel.org>, <devicetree@...r.kernel.org>,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	Liviu Dudau <Liviu.Dudau@....com>
Subject: [RFC 3/4] arm64: Do not call enable PCI resources when specify PCI_PROBE_ONLY

From: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>

When specify PCI_PROBE_ONLY, the resource parent does not get assigned.
Therefore, pci_enable_resources() return error saying that
"BAR x not claimed".

Note: This same logic is also used in the arch/arm/kernel/bios32.c

Cc: Liviu Dudau <Liviu.Dudau@....com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Will Deacon <will.deacon@....com>
Cc: Catalin Marinas <catalin.marinas@....com>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
---
 arch/arm64/kernel/pci.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index ce5836c..7fd4d2b 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -68,3 +68,11 @@ void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
 	bus->domain_nr = domain;
 }
 #endif
+
+int pcibios_enable_device(struct pci_dev *dev, int mask)
+{
+	if (pci_has_flag(PCI_PROBE_ONLY))
+		return 0;
+
+	return pci_enable_resources(dev, mask);
+}
-- 
1.9.3

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