[PATCH] dma-buf: heap-helpers: Set dma-buf exporter name

[Ezequiel Garcia]

Currently the heap helper uses DEFINE_DMA_BUF_EXPORT_INFO,
which uses KBUILD_MODNAME for the dma_buf_export_info.exp_name.

This effectively makes all dma-bufs exported by the heap
helper as coming from "heap-helpers", instead of the actual heap name
(cma, system, etc).

Fix this by adding a dma-heap name getter, and then setting
dma_buf_export_info.exp_name.

Signed-off-by: Ezequiel Garcia <ezequiel at collabora.com>
---
 drivers/dma-buf/dma-heap.c           | 5 +++++
 drivers/dma-buf/heaps/heap-helpers.c | 1 +
 include/linux/dma-heap.h             | 2 ++
 3 files changed, 8 insertions(+)

diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
index afd22c9dbdcf..13d001ee381a 100644
--- a/drivers/dma-buf/dma-heap.c
+++ b/drivers/dma-buf/dma-heap.c
@@ -190,6 +190,11 @@ void *dma_heap_get_drvdata(struct dma_heap *heap)
 	return heap->priv;
 }
 
+const char *dma_heap_get_name(struct dma_heap *heap)
+{
+	return heap->name;
+}
+
 struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
 {
 	struct dma_heap *heap, *h, *err_ret;
diff --git a/drivers/dma-buf/heaps/heap-helpers.c b/drivers/dma-buf/heaps/heap-helpers.c
index 9f964ca3f59c..47ecf9518442 100644
--- a/drivers/dma-buf/heaps/heap-helpers.c
+++ b/drivers/dma-buf/heaps/heap-helpers.c
@@ -30,6 +30,7 @@ struct dma_buf *heap_helper_export_dmabuf(struct heap_helper_buffer *buffer,
 {
 	DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
 
+	exp_info.exp_name = dma_heap_get_name(buffer->heap);
 	exp_info.ops = &heap_helper_ops;
 	exp_info.size = buffer->size;
 	exp_info.flags = fd_flags;
diff --git a/include/linux/dma-heap.h b/include/linux/dma-heap.h
index 454e354d1ffb..0acf7e71afb5 100644
--- a/include/linux/dma-heap.h
+++ b/include/linux/dma-heap.h
@@ -50,6 +50,8 @@ struct dma_heap_export_info {
  */
 void *dma_heap_get_drvdata(struct dma_heap *heap);
 
+const char *dma_heap_get_name(struct dma_heap *heap);
+
 /**
  * dma_heap_add - adds a heap to dmabuf heaps
  * @exp_info:		information needed to register this heap
-- 
2.27.0