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ANDROID: staging: ion: Allow for attach and detach ops to be overridden

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The ION core is supposed to allow for all of the dma-buf ops
to be overridden by a heap's dma-buf ops. However, the
attach and detach ops are not overridable, which doesn't make
much sense, as the other dma-buf ops assume that the attachment
structure that they operate on was allocated by their attach
callbacks, which aren't being invoked. Thus, allow for the dma-buf
attach and detach ops to be overridable.

Bug: 152270037
Change-Id: I981973911b8649700901740456e03ed4a1731c9a
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
This commit is contained in:
Isaac J. Manjarres
2020-03-23 14:57:51 -07:00
parent 1a39975db5
commit 5c03dff773
1 changed files with 8 additions and 0 deletions
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8
drivers/staging/android/ion/ion_dma_buf.c
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@@ -57,6 +57,10 @@ static int ion_dma_buf_attach(struct dma_buf *dmabuf,
struct ion_dma_buf_attachment *a;
struct sg_table *table;
struct ion_buffer *buffer = dmabuf->priv;
struct ion_heap *heap = buffer->heap;
if (heap->buf_ops.attach)
return heap->buf_ops.attach(dmabuf, attachment);
a = kzalloc(sizeof(*a), GFP_KERNEL);
if (!a)
@@ -86,6 +90,10 @@ static void ion_dma_buf_detatch(struct dma_buf *dmabuf,
{
struct ion_dma_buf_attachment *a = attachment->priv;
struct ion_buffer *buffer = dmabuf->priv;
struct ion_heap *heap = buffer->heap;
if (heap->buf_ops.detach)
return heap->buf_ops.detach(dmabuf, attachment);
mutex_lock(&buffer->lock);
list_del(&a->list);