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RDMA/umem: Move umem dmabuf revoke logic into helper function

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This same logic will eventually be reused from within the
invalidate_mappings callback which already has the dma_resv_lock
held, so break it out into a separate function so it can be reused.

Signed-off-by: Jacob Moroni <jmoroni@google.com>
Link: https://patch.msgid.link/20260305170826.3803155-3-jmoroni@google.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Jacob Moroni
2026-03-05 17:08:23 +00:00
committed by Leon Romanovsky
parent 553dfa8cbd
commit 797291a66c
1 changed files with 17 additions and 9 deletions
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26
drivers/infiniband/core/umem_dmabuf.c
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@@ -195,6 +195,22 @@ static struct dma_buf_attach_ops ib_umem_dmabuf_attach_pinned_ops = {
.move_notify = ib_umem_dmabuf_unsupported_move_notify,
};
static void ib_umem_dmabuf_revoke_locked(struct dma_buf_attachment *attach)
{
struct ib_umem_dmabuf *umem_dmabuf = attach->importer_priv;
dma_resv_assert_held(attach->dmabuf->resv);
if (umem_dmabuf->revoked)
return;
ib_umem_dmabuf_unmap_pages(umem_dmabuf);
if (umem_dmabuf->pinned) {
dma_buf_unpin(umem_dmabuf->attach);
umem_dmabuf->pinned = 0;
}
umem_dmabuf->revoked = 1;
}
static struct ib_umem_dmabuf *
ib_umem_dmabuf_get_pinned_and_lock(struct ib_device *device,
struct device *dma_device,
@@ -262,15 +278,7 @@ void ib_umem_dmabuf_revoke(struct ib_umem_dmabuf *umem_dmabuf)
struct dma_buf *dmabuf = umem_dmabuf->attach->dmabuf;
dma_resv_lock(dmabuf->resv, NULL);
if (umem_dmabuf->revoked)
goto end;
ib_umem_dmabuf_unmap_pages(umem_dmabuf);
if (umem_dmabuf->pinned) {
dma_buf_unpin(umem_dmabuf->attach);
umem_dmabuf->pinned = 0;
}
umem_dmabuf->revoked = 1;
end:
ib_umem_dmabuf_revoke_locked(umem_dmabuf->attach);
dma_resv_unlock(dmabuf->resv);
}
EXPORT_SYMBOL(ib_umem_dmabuf_revoke);