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iommu/fsl: Move ENODEV to fsl_pamu_probe_device()

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The expectation is for the probe op to return ENODEV if the iommu is not
able to support the device. Move the check for fsl,liodn to
fsl_pamu_probe_device() simplify fsl_pamu_device_group()

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/2-v2-ce71068deeec+4cf6-fsl_rm_groups_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jason Gunthorpe 2023-05-16 21:35:27 -03:00 committed by Joerg Roedel
parent 5f6489723d
commit 7977a08e11
1 changed files with 12 additions and 7 deletions
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19
drivers/iommu/fsl_pamu_domain.c
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@ -427,23 +427,28 @@ static struct iommu_group *get_pci_device_group(struct pci_dev *pdev)
static struct iommu_group *fsl_pamu_device_group(struct device *dev)
{
struct iommu_group *group = ERR_PTR(-ENODEV);
int len;
/*
* For platform devices we allocate a separate group for
* each of the devices.
*/
if (dev_is_pci(dev))
group = get_pci_device_group(to_pci_dev(dev));
else if (of_get_property(dev->of_node, "fsl,liodn", &len))
if (!dev_is_pci(dev))
return generic_device_group(dev);
return group;
return get_pci_device_group(to_pci_dev(dev));
}
static struct iommu_device *fsl_pamu_probe_device(struct device *dev)
{
int len;
/*
* uboot must fill the fsl,liodn for platform devices to be supported by
* the iommu.
*/
if (!dev_is_pci(dev) &&
!of_get_property(dev->of_node, "fsl,liodn", &len))
return ERR_PTR(-ENODEV);
return &pamu_iommu;
}