1 files changed, 23 insertions, 0 deletions

diff --git a/include/linux/async_tx.h b/include/linux/async_tx.h
index 3d21a251751..12a2efcbd56 100644
--- a/include/linux/async_tx.h
+++ b/include/linux/async_tx.h
@@ -83,6 +83,24 @@ struct async_submit_ctl {
 
 #ifdef CONFIG_DMA_ENGINE
 #define async_tx_issue_pending_all dma_issue_pending_all
+
+/**
+ * async_tx_issue_pending - send pending descriptor to the hardware channel
+ * @tx: descriptor handle to retrieve hardware context
+ *
+ * Note: any dependent operations will have already been issued by
+ * async_tx_channel_switch, or (in the case of no channel switch) will
+ * be already pending on this channel.
+ */
+static inline void async_tx_issue_pending(struct dma_async_tx_descriptor *tx)
+{
+        if (likely(tx)) {
+                struct dma_chan *chan = tx->chan;
+                struct dma_device *dma = chan->device;
+
+                dma->device_issue_pending(chan);
+        }
+}
 #ifdef CONFIG_ARCH_HAS_ASYNC_TX_FIND_CHANNEL
 #include <asm/async_tx.h>
 #else
@@ -98,6 +116,11 @@ static inline void async_tx_issue_pending_all(void)
         do { } while (0);
 }
 
+static inline void async_tx_issue_pending(struct dma_async_tx_descriptor *tx)
+{
+        do { } while (0);
+}
+
 static inline struct dma_chan *
 async_tx_find_channel(struct async_submit_ctl *submit,
                       enum dma_transaction_type tx_type, struct page **dst,