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()'.
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| @@ -246,9 +246,10 @@ struct iommu_iotlb_gather { · 245 unmodified lines | ||
| 246 | 246 | * @sva_get_pasid: Get PASID associated to a SVA handle |
| 247 | 247 | * @page_response: handle page request response |
| 248 | 248 | * @cache_invalidate: invalidate translation caches |
| 249 | − * @pgsize_bitmap: bitmap of all possible supported page sizes | |
| 250 | 249 | * @sva_bind_gpasid: bind guest pasid and mm |
| 251 | 250 | * @sva_unbind_gpasid: unbind guest pasid and mm |
| 251 | + * @pgsize_bitmap: bitmap of all possible supported page sizes | |
| 252 | + * @owner: Driver module providing these ops | |
| 252 | 253 | */ |
| 253 | 254 | struct iommu_ops { |
| 254 | 255 | bool (*capable)(enum iommu_cap); |
| @@ -318,6 +319,7 @@ struct iommu_ops { · 63 unmodified lines | ||
| 318 | 319 | int (*sva_unbind_gpasid)(struct device *dev, int pasid); |
| 319 | 320 | |
| 320 | 321 | unsigned long pgsize_bitmap; |
| 322 | + struct module *owner; | |
| 321 | 323 | }; |
| 322 | 324 | |
| 323 | 325 | /** |