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| author |   Scott Wood <swood@redhat.com> | 2018-01-21 03:28:54 -0600 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2018-02-13 14:18:06 +0100 |
| commit | 27790398c2aed917828dc3c6f81240d57f1584c9 (patch) | |
| tree | e10672afbc28616d10901241df5bcec458c7bb94 /drivers/iommu/amd_iommu_types.h | |
| parent | Linux 4.16-rc1 (diff) | |
| download | linux-dev-27790398c2aed917828dc3c6f81240d57f1584c9.tar.xz linux-dev-27790398c2aed917828dc3c6f81240d57f1584c9.zip | |
iommu/amd: Use raw locks on atomic context paths
Several functions in this driver are called from atomic context,
and thus raw locks must be used in order to be safe on PREEMPT_RT.
This includes paths that must wait for command completion, which is
a potential PREEMPT_RT latency concern but not easily avoidable.
Signed-off-by: Scott Wood <swood@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd_iommu_types.h')
| -rw-r--r-- | drivers/iommu/amd_iommu_types.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index 6a877ebd058b..da886b0095aa 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -408,7 +408,7 @@ extern bool amd_iommu_iotlb_sup; #define IRQ_TABLE_ALIGNMENT 128 struct irq_remap_table { - spinlock_t lock; + raw_spinlock_t lock; unsigned min_index; u32 *table; }; @@ -490,7 +490,7 @@ struct amd_iommu { int index; /* locks the accesses to the hardware */ - spinlock_t lock; + raw_spinlock_t lock; /* Pointer to PCI device of this IOMMU */ struct pci_dev *dev; |