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| author | Robin Murphy <robin.murphy@arm.com> | 2022-08-15 17:20:03 +0100 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-09-07 14:25:01 +0200 |
| commit | cbc040081fdf7d73ef60112b24caa785b3f293f3 (patch) | |
| tree | 98d887b1aa98b79f62f35e9a68d2982464fd98d1 /drivers/iommu/amd | |
| parent | c919739ce4721ecf7b96b99253b032df30fcf19b (diff) | |
| download | linux-stable-cbc040081fdf7d73ef60112b24caa785b3f293f3.tar.gz linux-stable-cbc040081fdf7d73ef60112b24caa785b3f293f3.tar.bz2 linux-stable-cbc040081fdf7d73ef60112b24caa785b3f293f3.zip | |
iommu/amd: Handle race between registration and device probe
As for the Intel driver, make sure the AMD driver can cope with seeing
.probe_device calls without having to wait for all known instances to
register first.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/a8d8ebe12b411d28972f1ab928c6db92e8913cf5.1660572783.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd')
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 94220eb5bff3..85c4122b5d61 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -1851,6 +1851,10 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev) if (!iommu) return ERR_PTR(-ENODEV); + /* Not registered yet? */ + if (!iommu->iommu.ops) + return ERR_PTR(-ENODEV); + if (dev_iommu_priv_get(dev)) return &iommu->iommu; |