1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 504420f213ff..272bed6c8ba7 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -1141,6 +1141,41 @@ void dma_async_device_unregister(struct dma_device *device)
 }
 EXPORT_SYMBOL(dma_async_device_unregister);
 
+static void dmam_device_release(struct device *dev, void *res)
+{
+        struct dma_device *device;
+
+        device = *(struct dma_device **)res;
+        dma_async_device_unregister(device);
+}
+
+/**
+ * dmaenginem_async_device_register - registers DMA devices found
+ * @device: &dma_device
+ *
+ * The operation is managed and will be undone on driver detach.
+ */
+int dmaenginem_async_device_register(struct dma_device *device)
+{
+        void *p;
+        int ret;
+
+        p = devres_alloc(dmam_device_release, sizeof(void *), GFP_KERNEL);
+        if (!p)
+                return -ENOMEM;
+
+        ret = dma_async_device_register(device);
+        if (!ret) {
+                *(struct dma_device **)p = device;
+                devres_add(device->dev, p);
+        } else {
+                devres_free(p);
+        }
+
+        return ret;
+}
+EXPORT_SYMBOL(dmaenginem_async_device_register);
+
 struct dmaengine_unmap_pool {
         struct kmem_cache *cache;
         const char *name;