diff options
| author | Will Deacon <will@kernel.org> | 2019-12-19 15:03:41 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-12-23 16:06:05 +0300 |
| commit | 25f003de987aed630db265ceae9cd978537a3f80 (patch) | |
| tree | 6a53d13ae038b397f968766a1a5c7fa9b1b5fc71 /include/linux/iommu.h | |
| parent | 1a373a78b8e2fae1d61dd9c5ed22472045d83d24 (diff) | |
| download | linux-25f003de987aed630db265ceae9cd978537a3f80.tar.xz | |
drivers/iommu: Take a ref to the IOMMU driver prior to ->add_device()
To avoid accidental removal of an active IOMMU driver module, take a
reference to the driver module in 'iommu_probe_device()' immediately
prior to invoking the '->add_device()' callback and hold it until the
after the device has been removed by '->remove_device()'.
Suggested-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Will Deacon <will@kernel.org>
Tested-by: John Garry <john.garry@huawei.com> # smmu v3
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index f2223cbb5fd5..e9f94d3f7a04 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -246,9 +246,10 @@ struct iommu_iotlb_gather { * @sva_get_pasid: Get PASID associated to a SVA handle * @page_response: handle page request response * @cache_invalidate: invalidate translation caches - * @pgsize_bitmap: bitmap of all possible supported page sizes * @sva_bind_gpasid: bind guest pasid and mm * @sva_unbind_gpasid: unbind guest pasid and mm + * @pgsize_bitmap: bitmap of all possible supported page sizes + * @owner: Driver module providing these ops */ struct iommu_ops { bool (*capable)(enum iommu_cap); @@ -318,6 +319,7 @@ struct iommu_ops { int (*sva_unbind_gpasid)(struct device *dev, int pasid); unsigned long pgsize_bitmap; + struct module *owner; }; /** |