[PATCH v4 04/15] misc/habana: Use FOLL_LONGTERM for userptr

Daniel Vetter
2020-10-26T10:58:33Z

These are persistent, not just for the duration of a dma operation.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: linux-mm@kvack.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-media@vger.kernel.org
Cc: Oded Gabbay <oded.gabbay@gmail.com>
Cc: Omer Shpigelman <oshpigelman@habana.ai>
Cc: Ofir Bitton <obitton@habana.ai>
Cc: Tomer Tayar <ttayar@habana.ai>
Cc: Moti Haimovski <mhaimovski@habana.ai>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Pawel Piskorski <ppiskorski@habana.ai>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/misc/habanalabs/common/memory.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/habanalabs/common/memory.c b/drivers/misc/habanalabs/common/memory.c
index 327b64479f97..767d3644c033 100644
--- a/drivers/misc/habanalabs/common/memory.c
+++ b/drivers/misc/habanalabs/common/memory.c
@@ -1288,7 +1288,8 @@ static int get_user_memory(struct hl_device *hdev, u64 addr, u64 size,
return -ENOMEM;
}

- rc = pin_user_pages_fast(start, npages, FOLL_FORCE | FOLL_WRITE,
+ rc = pin_user_pages_fast(start, npages,
+ FOLL_FORCE | FOLL_WRITE | FOLL_LONGTERM,
userptr->pages);

if (rc != npages) {
--
2.28.0