diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-12-07 14:03:12 -0400 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-12-12 10:18:49 +0100 |
| commit | eda1a94caf6b05482bbf57dc244e7a31a9dba77c (patch) | |
| tree | 2820166425e5b344e62877e09b25d2eedc204b93 /drivers/iommu/amd | |
| parent | 64945d1b0ed169aeffa59020941e4ac45ebc315a (diff) | |
| download | lwn-eda1a94caf6b05482bbf57dc244e7a31a9dba77c.tar.gz lwn-eda1a94caf6b05482bbf57dc244e7a31a9dba77c.zip | |
iommu: Mark dev_iommu_priv_set() with a lockdep
A perfect driver would only call dev_iommu_priv_set() from its probe
callback. We've made it functionally correct to call it from the of_xlate
by adding a lock around that call.
lockdep assert that iommu_probe_device_lock is held to discourage misuse.
Exclude PPC kernels with CONFIG_FSL_PAMU turned on because FSL_PAMU uses a
global static for its priv and abuses priv for its domain.
Remove the pointless stores of NULL, all these are on paths where the core
code will free dev->iommu after the op returns.
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Tested-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/5-v2-16e4def25ebb+820-iommu_fwspec_p1_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd')
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index fcc987f5d4ed..8199c678c2dc 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -551,8 +551,6 @@ static void amd_iommu_uninit_device(struct device *dev) if (dev_data->domain) detach_device(dev); - dev_iommu_priv_set(dev, NULL); - /* * We keep dev_data around for unplugged devices and reuse it when the * device is re-plugged - not doing so would introduce a ton of races. |