dma-buf: some kerneldoc formatting fixes

Noticed while reviewing the output. Adds a bunch more links and fixes
the function interface quoting.

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Link: https://patchwork.freedesktop.org/patch/msgid/20201211155843.3348718-2-daniel.vetter@ffwll.ch

drivers/dma-buf/dma-buf.c

@@ -480,7 +480,7 @@ err_alloc_file:
  *
  * 4. Once a driver is done with a shared buffer it needs to call
  *    dma_buf_detach() (after cleaning up any mappings) and then release the
- *    reference acquired with dma_buf_get by calling dma_buf_put().
+ *    reference acquired with dma_buf_get() by calling dma_buf_put().
  *
  * For the detailed semantics exporters are expected to implement see
  * &dma_buf_ops.
@@ -496,9 +496,10 @@ err_alloc_file:
  *			by the exporter. see &struct dma_buf_export_info
  *			for further details.
  *
- * Returns, on success, a newly created dma_buf object, which wraps the
+ * Returns, on success, a newly created struct dma_buf object, which wraps the
- * supplied private data and operations for dma_buf_ops. On either missing
+ * supplied private data and operations for struct dma_buf_ops. On either
- * ops, or error in allocating struct dma_buf, will return negative error.
+ * missing ops, or error in allocating struct dma_buf, will return negative
+ * error.
  *
  * For most cases the easiest way to create @exp_info is through the
  * %DEFINE_DMA_BUF_EXPORT_INFO macro.
@@ -584,7 +585,7 @@ err_module:
 EXPORT_SYMBOL_GPL(dma_buf_export);
 
 /**
- * dma_buf_fd - returns a file descriptor for the given dma_buf
+ * dma_buf_fd - returns a file descriptor for the given struct dma_buf
  * @dmabuf:	[in]	pointer to dma_buf for which fd is required.
  * @flags:      [in]    flags to give to fd
  *
@@ -608,10 +609,10 @@ int dma_buf_fd(struct dma_buf *dmabuf, int flags)
 EXPORT_SYMBOL_GPL(dma_buf_fd);
 
 /**
- * dma_buf_get - returns the dma_buf structure related to an fd
+ * dma_buf_get - returns the struct dma_buf related to an fd
- * @fd:	[in]	fd associated with the dma_buf to be returned
+ * @fd:	[in]	fd associated with the struct dma_buf to be returned
  *
- * On success, returns the dma_buf structure associated with an fd; uses
+ * On success, returns the struct dma_buf associated with an fd; uses
  * file's refcounting done by fget to increase refcount. returns ERR_PTR
  * otherwise.
  */
@@ -653,8 +654,7 @@ void dma_buf_put(struct dma_buf *dmabuf)
 EXPORT_SYMBOL_GPL(dma_buf_put);
 
 /**
- * dma_buf_dynamic_attach - Add the device to dma_buf's attachments list; optionally,
+ * dma_buf_dynamic_attach - Add the device to dma_buf's attachments list
- * calls attach() of dma_buf_ops to allow device-specific attach functionality
  * @dmabuf:		[in]	buffer to attach device to.
  * @dev:		[in]	device to be attached.
  * @importer_ops:	[in]	importer operations for the attachment
@@ -663,6 +663,9 @@ EXPORT_SYMBOL_GPL(dma_buf_put);
  * Returns struct dma_buf_attachment pointer for this attachment. Attachments
  * must be cleaned up by calling dma_buf_detach().
  *
+ * Optionally this calls &dma_buf_ops.attach to allow device-specific attach
+ * functionality.
+ *
  * Returns:
  *
  * A pointer to newly created &dma_buf_attachment on success, or a negative
@@ -769,12 +772,13 @@ struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
 EXPORT_SYMBOL_GPL(dma_buf_attach);
 
 /**
- * dma_buf_detach - Remove the given attachment from dmabuf's attachments list;
+ * dma_buf_detach - Remove the given attachment from dmabuf's attachments list
- * optionally calls detach() of dma_buf_ops for device-specific detach
  * @dmabuf:	[in]	buffer to detach from.
  * @attach:	[in]	attachment to be detached; is free'd after this call.
  *
  * Clean up a device attachment obtained by calling dma_buf_attach().
+ *
+ * Optionally this calls &dma_buf_ops.detach for device-specific detach.
  */
 void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)
 {
@@ -1061,11 +1065,12 @@ EXPORT_SYMBOL_GPL(dma_buf_move_notify);
  *   shootdowns would increase the complexity quite a bit.
  *
  *   Interface::
+ *
  *      int dma_buf_mmap(struct dma_buf \*, struct vm_area_struct \*,
  *		       unsigned long);
  *
  *   If the importing subsystem simply provides a special-purpose mmap call to
- *   set up a mapping in userspace, calling do_mmap with dma_buf->file will
+ *   set up a mapping in userspace, calling do_mmap with &dma_buf.file will
  *   equally achieve that for a dma-buf object.
  */
 

include/linux/dma-buf.h

@@ -85,10 +85,10 @@ struct dma_buf_ops {
 	/**
 	 * @pin:
 	 *
-	 * This is called by dma_buf_pin and lets the exporter know that the
+	 * This is called by dma_buf_pin() and lets the exporter know that the
 	 * DMA-buf can't be moved any more.
 	 *
-	 * This is called with the dmabuf->resv object locked and is mutual
+	 * This is called with the &dmabuf.resv object locked and is mutual
 	 * exclusive with @cache_sgt_mapping.
 	 *
 	 * This callback is optional and should only be used in limited use
@@ -103,7 +103,7 @@ struct dma_buf_ops {
 	/**
 	 * @unpin:
 	 *
-	 * This is called by dma_buf_unpin and lets the exporter know that the
+	 * This is called by dma_buf_unpin() and lets the exporter know that the
 	 * DMA-buf can be moved again.
 	 *
 	 * This is called with the dmabuf->resv object locked and is mutual