dmaengine: track the number of clients using a channel

[firefly-linux-kernel-4.4.55.git] / include / linux / dmaengine.h

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index d08a5c5eb928f3f2d8ef8639a518b0ac37fb6c89..6432b83432201ab5e431c32e2b163b5d1c6388c7 100644 (file)
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -139,6 +139,7 @@ struct dma_chan_percpu {
  * @rcu: the DMA channel's RCU head
  * @device_node: used to add this to the device chan list
  * @local: per-cpu pointer to a struct dma_chan_percpu
+ * @client-count: how many clients are using this channel
  */
 struct dma_chan {
        struct dma_device *device;
@@ -154,6 +155,7 @@ struct dma_chan {
 
        struct list_head device_node;
        struct dma_chan_percpu *local;
+       int client_count;
 };
 
 #define to_dma_chan(p) container_of(p, struct dma_chan, dev)