[IOAT]: fix kernel-doc in source files

Fix kernel-doc warnings in drivers/dma/:
- use correct function & parameter names
- add descriptions where omitted

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/dma/dmaengine.c

@@ -166,8 +166,8 @@ static struct dma_chan *dma_client_chan_alloc(struct dma_client *client)
 }
 
 /**
- * dma_client_chan_free - release a DMA channel
- * @chan: &dma_chan
+ * dma_chan_cleanup - release a DMA channel's resources
+ * @kref: kernel reference structure that contains the DMA channel device
  */
 void dma_chan_cleanup(struct kref *kref)
 {
@@ -199,7 +199,7 @@ static void dma_client_chan_free(struct dma_chan *chan)
  * dma_chans_rebalance - reallocate channels to clients
  *
  * When the number of DMA channel in the system changes,
- * channels need to be rebalanced among clients
+ * channels need to be rebalanced among clients.
  */
 static void dma_chans_rebalance(void)
 {
@@ -264,7 +264,7 @@ struct dma_client *dma_async_client_register(dma_event_callback event_callback)
 
 /**
  * dma_async_client_unregister - unregister a client and free the &dma_client
- * @client:
+ * @client: &dma_client to free
  *
  * Force frees any allocated DMA channels, frees the &dma_client memory
  */
@@ -306,7 +306,7 @@ void dma_async_client_chan_request(struct dma_client *client,
 }
 
 /**
- * dma_async_device_register -
+ * dma_async_device_register - registers DMA devices found
  * @device: &dma_device
  */
 int dma_async_device_register(struct dma_device *device)
@@ -348,8 +348,8 @@ int dma_async_device_register(struct dma_device *device)
 }
 
 /**
- * dma_async_device_unregister -
- * @device: &dma_device
+ * dma_async_device_cleanup - function called when all references are released
+ * @kref: kernel reference object
  */
 static void dma_async_device_cleanup(struct kref *kref)
 {
@@ -359,7 +359,11 @@ static void dma_async_device_cleanup(struct kref *kref)
 	complete(&device->done);
 }
 
-void dma_async_device_unregister(struct dma_device* device)
+/**
+ * dma_async_device_unregister - unregisters DMA devices
+ * @device: &dma_device
+ */
+void dma_async_device_unregister(struct dma_device *device)
 {
 	struct dma_chan *chan;
 	unsigned long flags;

drivers/dma/ioatdma.c

@@ -217,7 +217,7 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan)
 
 /**
  * do_ioat_dma_memcpy - actual function that initiates a IOAT DMA transaction
- * @chan: IOAT DMA channel handle
+ * @ioat_chan: IOAT DMA channel handle
  * @dest: DMA destination address
  * @src: DMA source address
  * @len: transaction length in bytes
@@ -383,7 +383,7 @@ static dma_cookie_t ioat_dma_memcpy_buf_to_pg(struct dma_chan *chan,
  * @dest_off: offset into that page
  * @src_pg: pointer to the page to copy from
  * @src_off: offset into that page
- * @len: transaction length in bytes. This is guaranteed to not make a copy
+ * @len: transaction length in bytes. This is guaranteed not to make a copy
  *	 across a page boundary.
  */
 
@@ -407,7 +407,7 @@ static dma_cookie_t ioat_dma_memcpy_pg_to_pg(struct dma_chan *chan,
 }
 
 /**
- * ioat_dma_memcpy_issue_pending - push potentially unrecognoized appended descriptors to hw
+ * ioat_dma_memcpy_issue_pending - push potentially unrecognized appended descriptors to hw
  * @chan: DMA channel handle
  */
 
@@ -510,6 +510,8 @@ static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *chan)
  * ioat_dma_is_complete - poll the status of a IOAT DMA transaction
  * @chan: IOAT DMA channel handle
  * @cookie: DMA transaction identifier
+ * @done: if not %NULL, updated with last completed transaction
+ * @used: if not %NULL, updated with last used transaction
  */
 
 static enum dma_status ioat_dma_is_complete(struct dma_chan *chan,