linux-kernel - [RFC PATCH V5 4/5] ARM64/PCI: Start using quirks handling for ACPI based PCI host controller

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Date:	Mon,  8 Aug 2016 15:05:40 +0200
From:	Tomasz Nowicki <tn@...ihalf.com>
To:	helgaas@...nel.org, arnd@...db.de, will.deacon@....com,
	catalin.marinas@....com, rafael@...nel.org,
	Lorenzo.Pieralisi@....com
Cc:	hanjun.guo@...aro.org, okaya@...eaurora.org, jchandra@...adcom.com,
	cov@...eaurora.org, dhdang@....com, ard.biesheuvel@...aro.org,
	robert.richter@...iumnetworks.com, mw@...ihalf.com,
	Liviu.Dudau@....com, ddaney@...iumnetworks.com,
	wangyijing@...wei.com, msalter@...hat.com,
	linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linaro-acpi@...ts.linaro.org, jcm@...hat.com,
	andrea.gallo@...aro.org, jeremy.linton@....com,
	liudongdong3@...wei.com, gabriele.paoloni@...wei.com,
	jhugo@...eaurora.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Tomasz Nowicki <tn@...ihalf.com>
Subject: [RFC PATCH V5 4/5] ARM64/PCI: Start using quirks handling for ACPI based PCI host controller

Since there are platforms which have non-compliant ECAM space we need to
override these accessors prior to PCI buses enumeration. In order to do
that we call pci_mcfg_match_quirks() to retrieve custom
pci_config_window structure. If no correlated quirk on list, use
fully ECAM compliant generic PCI config accessors.

Signed-off-by: Tomasz Nowicki <tn@...ihalf.com>
---
 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 2e7bed4..aa734bd 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -139,8 +139,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 	if (!ri)
 		return NULL;
 
-	ri->cfg = pci_acpi_setup_ecam_mapping(root,
-					      &pci_generic_ecam_ops.pci_ops);
+	ri->cfg = pci_mcfg_match_quirks(root);
 	if (!ri->cfg) {
 		kfree(ri);
 		return NULL;
-- 
1.9.1