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iommufd/selftest: Check the bus type during probe

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This relied on the probe function only being invoked by the bus type mock
was registered on. The removal of the bus ops broke this assumption and
the probe could be called on non-mock bus types like PCI.

Check the bus type directly in probe.

Fixes: 17de3f5fdd ("iommu: Retire bus ops")
Link: https://lore.kernel.org/r/0-v1-82d59f7eab8c+40c-iommufd_mock_bus_jgg@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Jason Gunthorpe 2024-01-03 11:27:22 -04:00
parent f6f3721244
commit 47f2bd2ff3
1 changed files with 15 additions and 13 deletions
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28
drivers/iommu/iommufd/selftest.c
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@ -25,6 +25,19 @@ static struct iommu_domain_ops domain_nested_ops;
size_t iommufd_test_memory_limit = 65536;
struct mock_bus_type {
struct bus_type bus;
struct notifier_block nb;
};
static struct mock_bus_type iommufd_mock_bus_type = {
.bus = {
.name = "iommufd_mock",
},
};
static atomic_t mock_dev_num;
enum {
MOCK_DIRTY_TRACK = 1,
MOCK_IO_PAGE_SIZE = PAGE_SIZE / 2,
@ -437,6 +450,8 @@ static struct iommu_device mock_iommu_device = {
static struct iommu_device *mock_probe_device(struct device *dev)
{
if (dev->bus != &iommufd_mock_bus_type.bus)
return ERR_PTR(-ENODEV);
return &mock_iommu_device;
}
@ -576,19 +591,6 @@ get_md_pagetable_nested(struct iommufd_ucmd *ucmd, u32 mockpt_id,
return hwpt;
}
struct mock_bus_type {
struct bus_type bus;
struct notifier_block nb;
};
static struct mock_bus_type iommufd_mock_bus_type = {
.bus = {
.name = "iommufd_mock",
},
};
static atomic_t mock_dev_num;
static void mock_dev_release(struct device *dev)
{
struct mock_dev *mdev = container_of(dev, struct mock_dev, dev);