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iommu/of: Use helper functions to access dev->iommu_fwspec

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Use the new helpers dev_iommu_fwspec_get()/set() to access
the dev->iommu_fwspec pointer. This makes it easier to move
that pointer later into another struct.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2018-11-29 14:01:00 +01:00
parent a9bf2eec5a
commit 5c7e6bd71b
1 changed files with 7 additions and 3 deletions
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10
drivers/iommu/of_iommu.c
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@ -164,7 +164,7 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
struct device_node *master_np)
{
const struct iommu_ops *ops = NULL;
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
int err = NO_IOMMU;
if (!master_np)
@ -208,14 +208,18 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
}
}
/*
* Two success conditions can be represented by non-negative err here:
* >0 : there is no IOMMU, or one was unavailable for non-fatal reasons
* 0 : we found an IOMMU, and dev->fwspec is initialised appropriately
* <0 : any actual error
*/
if (!err)
ops = dev->iommu_fwspec->ops;
if (!err) {
/* The fwspec pointer changed, read it again */
fwspec = dev_iommu_fwspec_get(dev);
ops = fwspec->ops;
}
/*
* If we have reason to believe the IOMMU driver missed the initial
* add_device callback for dev, replay it to get things in order.