dma-buf: dma-heap: Provide accessor to get heap name

It can be useful to access the name for the heap,
so provide an accessor to do so.

Cc: Daniel Vetter <[e-mail]>
Cc: Sumit Semwal <[e-mail]>
Cc: Liam Mark <[e-mail]>
Cc: Chris Goldsworthy <[e-mail]>
Cc: Laura Abbott <[e-mail]>
Cc: Brian Starkey <[e-mail]>
Cc: Hridya Valsaraju <[e-mail]>
Cc: Suren Baghdasaryan <[e-mail]>
Cc: Sandeep Patil <[e-mail]>
Cc: Daniel Mentz <[e-mail]>
Cc: Ørjan Eide <[e-mail]>
Cc: Robin Murphy <[e-mail]>
Cc: Ezequiel Garcia <[e-mail]>
Cc: Simon Ser <[e-mail]>
Cc: James Jones <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: John Stultz <[e-mail]>
Acked-by: Daniel Vetter <[e-mail]>
Signed-off-by: Sumit Semwal <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/dma-buf/dma-heap.c

···
 	return heap->priv;
 }
 
+/**
+ * dma_heap_get_name() - get heap name
+ * @heap: DMA-Heap to retrieve private data for
+ *
+ * Returns:
+ * The char* for the heap name.
+ */
+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;

include/linux/dma-heap.h

···
 void *dma_heap_get_drvdata(struct dma_heap *heap);
 
 /**
+ * dma_heap_get_name() - get heap name
+ * @heap: DMA-Heap to retrieve private data for
+ *
+ * Returns:
+ * The char* for the heap name.
+ */
+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
  */