From: Christian König <[email protected]> This didn't helped as intended, just simplify the code.
v2: unlock mmap_sem in the error path as well Signed-off-by: Christian König <[email protected]> Reviewed-by: Felix Kuehling <[email protected]> --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 12 +----------- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 4 ---- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 8 +++++++- 3 files changed, 8 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index 4ab35db..e6e04d3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -497,18 +497,14 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p, struct amdgpu_fpriv *fpriv = p->filp->driver_priv; struct amdgpu_bo_list_entry *e; struct list_head duplicates; - bool need_mmap_lock = false; unsigned i, tries = 10; int r; INIT_LIST_HEAD(&p->validated); p->bo_list = amdgpu_bo_list_get(fpriv, cs->in.bo_list_handle); - if (p->bo_list) { - need_mmap_lock = p->bo_list->first_userptr != - p->bo_list->num_entries; + if (p->bo_list) amdgpu_bo_list_get_list(p->bo_list, &p->validated); - } INIT_LIST_HEAD(&duplicates); amdgpu_vm_get_pd_bo(&fpriv->vm, &p->validated, &p->vm_pd); @@ -516,9 +512,6 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p, if (p->uf_entry.robj) list_add(&p->uf_entry.tv.head, &p->validated); - if (need_mmap_lock) - down_read(¤t->mm->mmap_sem); - while (1) { struct list_head need_pages; unsigned i; @@ -670,9 +663,6 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p, error_free_pages: - if (need_mmap_lock) - up_read(¤t->mm->mmap_sem); - if (p->bo_list) { for (i = p->bo_list->first_userptr; i < p->bo_list->num_entries; ++i) { diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index f1e61b3..b0d45c8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -318,8 +318,6 @@ int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data, } if (args->flags & AMDGPU_GEM_USERPTR_VALIDATE) { - down_read(¤t->mm->mmap_sem); - r = amdgpu_ttm_tt_get_user_pages(bo->tbo.ttm, bo->tbo.ttm->pages); if (r) @@ -334,8 +332,6 @@ int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data, amdgpu_bo_unreserve(bo); if (r) goto free_pages; - - up_read(¤t->mm->mmap_sem); } r = drm_gem_handle_create(filp, gobj, &handle); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 07c3f11..facea17 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -622,6 +622,8 @@ int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages) if (!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY)) flags |= FOLL_WRITE; + down_read(¤t->mm->mmap_sem); + if (gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) { /* check that we only use anonymous memory to prevent problems with writeback */ @@ -629,8 +631,10 @@ int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages) struct vm_area_struct *vma; vma = find_vma(gtt->usermm, gtt->userptr); - if (!vma || vma->vm_file || vma->vm_end < end) + if (!vma || vma->vm_file || vma->vm_end < end) { + up_read(¤t->mm->mmap_sem); return -EPERM; + } } do { @@ -657,10 +661,12 @@ int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages) } while (pinned < ttm->num_pages); + up_read(¤t->mm->mmap_sem); return 0; release_pages: release_pages(pages, pinned, 0); + up_read(¤t->mm->mmap_sem); return r; } -- 2.7.4 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
