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| author |   Ohad Ben-Cohen <ohad@wizery.com> | 2011-09-27 07:36:40 -0400 |
|---|---|---|
| committer |   Joerg Roedel <joerg.roedel@amd.com> | 2011-09-30 16:40:32 +0200 |
| commit | 0ed6d2d27bcc2ace454a8c55446e1bc3efd2d529 (patch) | |
| tree | 0ed0c8f9878ee5a921ab69131e38a45864e2498f /include/linux/iommu.h | |
| parent | iommu/core: export iommu_set_fault_handler() (diff) | |
| download | linux-dev-0ed6d2d27bcc2ace454a8c55446e1bc3efd2d529.tar.xz linux-dev-0ed6d2d27bcc2ace454a8c55446e1bc3efd2d529.zip | |
iommu/core: let drivers know if an iommu fault handler isn't installed
Make report_iommu_fault() return -ENOSYS whenever an iommu fault
handler isn't installed, so IOMMU drivers can then do their own
platform-specific default behavior if they wanted.
Fault handlers can still return -ENOSYS in case they want to elicit the
default behavior of the IOMMU drivers.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index d084e8777e0e..ddad0ae0a433 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -98,11 +98,15 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain, * Returns 0 on success and an appropriate error code otherwise (if dynamic * PTE/TLB loading will one day be supported, implementations will be able * to tell whether it succeeded or not according to this return value). + * + * Specifically, -ENOSYS is returned if a fault handler isn't installed + * (though fault handlers can also return -ENOSYS, in case they want to + * elicit the default behavior of the IOMMU drivers). */ static inline int report_iommu_fault(struct iommu_domain *domain, struct device *dev, unsigned long iova, int flags) { - int ret = 0; + int ret = -ENOSYS; /* * if upper layers showed interest and installed a fault handler, |