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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: linux-pci@vger.kernel.org
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Sinan Kaya <okaya@kernel.org>, Zeev Zilberman <zeev@amazon.com>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	Bjorn Helgaas <helgaas@kernel.org>,
	Ali Saidi <alisaidi@amazon.com>
Subject: [PATCH 1/4] arm64: pci: acpi: Use pci_assign_unassigned_root_bus_resources()
Date: Sat, 15 Jun 2019 10:23:56 +1000
Message-ID: <20190615002359.29577-1-benh@kernel.crashing.org> (raw)

Instead of the simpler

	pci_bus_size_bridges(bus);
	pci_bus_assign_resources(bus);

Use pci_assign_unassigned_root_bus_resources(). This should have no effect
as long as we are reassigning everything. Once we start honoring FW
resource allocations, this will bring up the "reallocation" feature
which can help making room for SR-IOV when necessary.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/arm64/kernel/pci.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index bb85e2f4603f..1419b1b4e9b9 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -193,8 +193,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 	if (!bus)
 		return NULL;
 
-	pci_bus_size_bridges(bus);
-	pci_bus_assign_resources(bus);
+	pci_assign_unassigned_root_bus_resources(bus);
 
 	list_for_each_entry(child, &bus->children, node)
 		pcie_bus_configure_settings(child);
-- 
2.17.1


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Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-15  0:23 Benjamin Herrenschmidt [this message]
2019-06-15  0:23 ` [PATCH 2/4] pci: acpi: Read _DSM #5 from ACPI on root bridges Benjamin Herrenschmidt
2019-06-21 20:07   ` Bjorn Helgaas
2019-06-15  0:23 ` [PATCH 3/4] pci: Do not auto-enable PCI reallocation when _DSM #5 returns 0 Benjamin Herrenschmidt
2019-06-21 20:07   ` Bjorn Helgaas
2019-06-15  0:23 ` [PATCH 4/4] arm64: pci: acpi: Preserve PCI resources configuration when asked by ACPI Benjamin Herrenschmidt
2019-06-21 14:57   ` Lorenzo Pieralisi
2019-06-21 23:07     ` Benjamin Herrenschmidt
2019-06-21 15:44   ` Ard Biesheuvel
2019-06-21 20:08   ` Bjorn Helgaas
2019-06-20 17:13 ` [PATCH 1/4] arm64: pci: acpi: Use pci_assign_unassigned_root_bus_resources() Lorenzo Pieralisi
2019-06-20 22:55   ` Benjamin Herrenschmidt
2019-06-21 20:06 ` Bjorn Helgaas
2019-06-21 20:48 ` Bjorn Helgaas
2019-06-21 22:58   ` Benjamin Herrenschmidt
2019-06-21 23:00   ` Benjamin Herrenschmidt
2019-06-21 23:15     ` Bjorn Helgaas

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