linux-kernel - [PATCH 2/2] iommu: calling pci_fixup_iommu in iommu_fwspec

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Message-Id: <1590493749-13823-3-git-send-email-zhangfei.gao@linaro.org>
Date:   Tue, 26 May 2020 19:49:09 +0800
From:   Zhangfei Gao <zhangfei.gao@...aro.org>
To:     Joerg Roedel <joro@...tes.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Arnd Bergmann <arnd@...db.de>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Hanjun Guo <guohanjun@...wei.com>,
        Sudeep Holla <sudeep.holla@....com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        jean-philippe <jean-philippe@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        kenneth-lee-2012@...mail.com, Wangzhou <wangzhou1@...ilicon.com>
Cc:     linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        iommu@...ts.linux-foundation.org, linux-acpi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-pci@...r.kernel.org,
        Zhangfei Gao <zhangfei.gao@...aro.org>
Subject: [PATCH 2/2] iommu: calling pci_fixup_iommu in iommu_fwspec_init

Calling pci_fixup_iommu in iommu_fwspec_init, which alloc
iommu_fwnode. Some platform devices appear as PCI but are
actually on the AMBA bus, and they need fixup in
drivers/pci/quirks.c handling iommu_fwnode.
So calling pci_fixup_iommu after iommu_fwnode is allocated.

Signed-off-by: Zhangfei Gao <zhangfei.gao@...aro.org>
---
 drivers/iommu/iommu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 7b37542..fb84c42 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2418,6 +2418,10 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
 	fwspec->iommu_fwnode = iommu_fwnode;
 	fwspec->ops = ops;
 	dev_iommu_fwspec_set(dev, fwspec);
+
+	if (dev_is_pci(dev))
+		pci_fixup_device(pci_fixup_iommu, to_pci_dev(dev));
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(iommu_fwspec_init);
-- 
2.7.4