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Subject: [media] DocBook: some fixes for DVB FE open() Author: Mauro Carvalho Chehab <[email protected]> Date: Mon Jun 1 05:54:20 2015 -0300 The changeset dc9ef7d11207 change the open() ioctl documentation to match the V4L2 open(). However, some cut-and-pasted stuff doesn't match what actually happens at the DVB core. So, fix the documentation entry to be more accurate with the DVB frontend open() specifics. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Documentation/DocBook/media/dvb/frontend.xml | 28 ++++++++++++++----------- 1 files changed, 16 insertions(+), 12 deletions(-) --- http://git.linuxtv.org/cgit.cgi/media_tree.git/commit/?id=6fd877748a9c4133e37417061e426188fcb00fea diff --git a/Documentation/DocBook/media/dvb/frontend.xml b/Documentation/DocBook/media/dvb/frontend.xml index c7fa3d8..9d8e95c 100644 --- a/Documentation/DocBook/media/dvb/frontend.xml +++ b/Documentation/DocBook/media/dvb/frontend.xml @@ -61,7 +61,7 @@ specification is available at <refentry id="frontend_f_open"> <refmeta> - <refentrytitle>open()</refentrytitle> + <refentrytitle>DVB frontend open()</refentrytitle> &manvol; </refmeta> @@ -94,20 +94,19 @@ specification is available at <varlistentry> <term><parameter>flags</parameter></term> <listitem> - <para>Open flags. Access mode must be -<constant>O_RDWR</constant>. This is just a technicality, input devices -still support only reading and output devices only writing.</para> - <para>When the <constant>O_NONBLOCK</constant> flag is -given, the read() function will return the &EAGAIN; when no data is available, -otherwise these functions block until data becomes -available. Other flags have no effect.</para> + <para>Open flags. Access can either be + <constant>O_RDWR</constant> or <constant>O_RDONLY</constant>.</para> + <para>Multiple opens are allowed with <constant>O_RDONLY</constant>. In this mode, only query and read ioctls are allowed.</para> + <para>Only one open is allowed in <constant>O_RDWR</constant>. In this mode, all ioctls are allowed.</para> + <para>When the <constant>O_NONBLOCK</constant> flag is given, the system calls may return &EAGAIN; when no data is available or when the device driver is temporarily busy.</para> + <para>Other flags have no effect.</para> </listitem> </varlistentry> </variablelist> </refsect1> <refsect1> <title>Description</title> -<para>This system call opens a named frontend device (/dev/dvb/adapter0/frontend0) + <para>This system call opens a named frontend device (<constant>/dev/dvb/adapter?/frontend?</constant>) for subsequent use. Usually the first thing to do after a successful open is to find out the frontend type with <link linkend="FE_GET_INFO">FE_GET_INFO</link>.</para> <para>The device can be opened in read-only mode, which only allows monitoring of @@ -145,8 +144,7 @@ device.</para> <varlistentry> <term><errorcode>EBUSY</errorcode></term> <listitem> - <para>The driver does not support multiple opens and the -device is already in use.</para> + <para>The the device driver is already in use.</para> </listitem> </varlistentry> <varlistentry> @@ -177,13 +175,19 @@ files open.</para> system has been reached.</para> </listitem> </varlistentry> + <varlistentry> + <term><errorcode>ENODEV</errorcode></term> + <listitem> + <para>The device got removed.</para> + </listitem> + </varlistentry> </variablelist> </refsect1> </refentry> <refentry id="frontend_f_close"> <refmeta> - <refentrytitle>close()</refentrytitle> + <refentrytitle>DVB frontend close()</refentrytitle> &manvol; </refmeta> _______________________________________________ linuxtv-commits mailing list [email protected] http://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
