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-rw-r--r--Documentation/media/uapi/dvb/dmx-fwrite.rst41
1 files changed, 19 insertions, 22 deletions
diff --git a/Documentation/media/uapi/dvb/dmx-fwrite.rst b/Documentation/media/uapi/dvb/dmx-fwrite.rst
index 8a90dfe28307..519e5733e53b 100644
--- a/Documentation/media/uapi/dvb/dmx-fwrite.rst
+++ b/Documentation/media/uapi/dvb/dmx-fwrite.rst
@@ -2,14 +2,14 @@
.. _dmx_fwrite:
-=================
-DVB demux write()
-=================
+========================
+Digital TV demux write()
+========================
Name
----
-DVB demux write()
+Digital TV demux write()
Synopsis
@@ -34,42 +34,39 @@ Description
-----------
This system call is only provided by the logical device
-/dev/dvb/adapter0/dvr0, associated with the physical demux device that
+``/dev/dvb/adapter?/dvr?``, associated with the physical demux device that
provides the actual DVR functionality. It is used for replay of a
digitally recorded Transport Stream. Matching filters have to be defined
-in the corresponding physical demux device, /dev/dvb/adapter0/demux0.
+in the corresponding physical demux device, ``/dev/dvb/adapter?/demux?``.
The amount of data to be transferred is implied by count.
Return Value
------------
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
+ :widths: 1 16
- - .. row 1
-
- - ``EWOULDBLOCK``
-
- - No data was written. This might happen if O_NONBLOCK was
+ - - ``EWOULDBLOCK``
+ - No data was written. This might happen if ``O_NONBLOCK`` was
specified and there is no more buffer space available (if
- O_NONBLOCK is not specified the function will block until buffer
+ ``O_NONBLOCK`` is not specified the function will block until buffer
space is available).
- - .. row 2
-
- - ``EBUSY``
-
+ - - ``EBUSY``
- This error code indicates that there are conflicting requests. The
corresponding demux device is setup to receive data from the
front- end. Make sure that these filters are stopped and that the
- filters with input set to DMX_IN_DVR are started.
-
- - .. row 3
-
- - ``EBADF``
+ filters with input set to ``DMX_IN_DVR`` are started.
- - fd is not a valid open file descriptor.
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.