From: Dan Williams <dan.j.williams@xxxxxxxxx>
dma_sync_wait is a common routine to live wait for a dma operation to
complete.
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
include/linux/dmaengine.h | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 9fd6cbd..0a70c9e 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -750,6 +750,18 @@ static inline void dma_async_unmap_singl
chan->device->unmap_single(chan, handle, size, direction);
}
+static inline enum dma_status dma_sync_wait(struct dma_chan *chan,
+ dma_cookie_t cookie)
+{
+ enum dma_status status;
+ dma_async_issue_pending(chan);
+ do {
+ status = dma_async_operation_complete(chan, cookie, NULL, NULL);
+ } while (status == DMA_IN_PROGRESS);
+
+ return status;
+}
+
/* --- DMA device --- */
int dma_async_device_register(struct dma_device *device);
-
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