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| author | Lorenzo Stoakes <lstoakes@gmail.com> | 2017-02-27 22:50:08 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-02-28 10:00:50 +0100 |
| commit | 0eb9acda36ac41e43afd152a96c2e769200bc264 (patch) | |
| tree | 72241712b927da7eef78890a7a5735eea511463b /drivers/gpu/drm/via | |
| parent | drm: sti: make driver use devm_of_platform_populate() (diff) | |
| download | linux-0eb9acda36ac41e43afd152a96c2e769200bc264.tar.xz linux-0eb9acda36ac41e43afd152a96c2e769200bc264.zip | |
drm/via: use get_user_pages_unlocked()
Moving from get_user_pages() to get_user_pages_unlocked() simplifies the code
and takes advantage of VM_FAULT_RETRY functionality when faulting in pages.
Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170227215008.21457-1-lstoakes@gmail.com
Diffstat (limited to 'drivers/gpu/drm/via')
| -rw-r--r-- | drivers/gpu/drm/via/via_dmablit.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/gpu/drm/via/via_dmablit.c b/drivers/gpu/drm/via/via_dmablit.c index 1a3ad769f8c8..98aae9809249 100644 --- a/drivers/gpu/drm/via/via_dmablit.c +++ b/drivers/gpu/drm/via/via_dmablit.c @@ -238,13 +238,9 @@ via_lock_all_dma_pages(drm_via_sg_info_t *vsg, drm_via_dmablit_t *xfer) vsg->pages = vzalloc(sizeof(struct page *) * vsg->num_pages); if (NULL == vsg->pages) return -ENOMEM; - down_read(¤t->mm->mmap_sem); - ret = get_user_pages((unsigned long)xfer->mem_addr, - vsg->num_pages, - (vsg->direction == DMA_FROM_DEVICE) ? FOLL_WRITE : 0, - vsg->pages, NULL); - - up_read(¤t->mm->mmap_sem); + ret = get_user_pages_unlocked((unsigned long)xfer->mem_addr, + vsg->num_pages, vsg->pages, + (vsg->direction == DMA_FROM_DEVICE) ? FOLL_WRITE : 0); if (ret != vsg->num_pages) { if (ret < 0) return ret; |