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drm/ttm: move SG flag check into ttm_bo_vm_reserve 

Just check earlier if a BO can be page faulted in the first place.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/392321/
This commit is contained in:
Christian König 2020-09-25 12:40:03 +02:00
parent 686d4b4b99
commit 0b5aebec2b
1 changed files with 9 additions and 7 deletions
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16
drivers/gpu/drm/ttm/ttm_bo_vm.c
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@ -157,6 +157,15 @@ vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo,
return VM_FAULT_NOPAGE;
}
/*
* Refuse to fault imported pages. This should be handled
* (if at all) by redirecting mmap to the exporter.
*/
if (bo->ttm && (bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) {
dma_resv_unlock(bo->base.resv);
return VM_FAULT_SIGBUS;
}
return 0;
}
EXPORT_SYMBOL(ttm_bo_vm_reserve);
@ -281,13 +290,6 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
vm_fault_t ret = VM_FAULT_NOPAGE;
unsigned long address = vmf->address;
/*
* Refuse to fault imported pages. This should be handled
* (if at all) by redirecting mmap to the exporter.
*/
if (bo->ttm && (bo->ttm->page_flags & TTM_PAGE_FLAG_SG))
return VM_FAULT_SIGBUS;
if (bdev->driver->fault_reserve_notify) {
struct dma_fence *moving = dma_fence_get(bo->moving);