Commit be9d6d4b authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

media: media-request: add media_request_get_by_fd 



Add media_request_get_by_fd() to find a request based on the file
descriptor.

The caller has to call media_request_put() for the returned
request since this function increments the refcount.

Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Acked-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
parent 496f6f4d

include/media/media-request.h

+24 −0
Original line number Diff line number Diff line
@@ -143,6 +143,24 @@ static inline void media_request_get(struct media_request *req) 
 */

void media_request_put(struct media_request *req);



/**

 * media_request_get_by_fd - Get a media request by fd

 *

 * @mdev: Media device this request belongs to

 * @request_fd: The file descriptor of the request

 *

 * Get the request represented by @request_fd that is owned

 * by the media device.

 *

 * Return a -EPERM error pointer if requests are not supported

 * by this driver. Return -ENOENT if the request was not found.

 * Return the pointer to the request if found: the caller will

 * have to call @media_request_put when it finished using the

 * request.

 */

struct media_request *

media_request_get_by_fd(struct media_device *mdev, int request_fd);



/**

 * media_request_alloc - Allocate the media request

 *
@@ -164,6 +182,12 @@ static inline void media_request_put(struct media_request *req) 
{

}



static inline struct media_request *

media_request_get_by_fd(struct media_device *mdev, int request_fd)

{

	return ERR_PTR(-EPERM);

}



#endif



/**