[media] DocBook: Add a chapter to describe media errors

There are several errors reported by V4L that aren't described.
They can occur on almost all ioctl's. Instead of adding them
into each ioctl, create a new chapter.

For V4L, the new chapter will automatically be listed on all
places, as there's a macro used everywhere there.

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/Documentation/DocBook/.gitignore b/Documentation/DocBook/.gitignore
index 25214a5..720f245 100644 (file)
--- a/Documentation/DocBook/.gitignore
+++ b/Documentation/DocBook/.gitignore
@@ -8,5 +8,7 @@
 *.dvi
 *.log
 *.out
+*.png
+*.gif
 media-indices.tmpl
 media-entities.tmpl

diff --git a/Documentation/DocBook/media/Makefile b/Documentation/DocBook/media/Makefile
index 8cb27f3..6628b4b 100644 (file)
--- a/Documentation/DocBook/media/Makefile
+++ b/Documentation/DocBook/media/Makefile
@@ -100,23 +100,59 @@ STRUCTS = \
        $(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/linux/v4l2-mediabus.h)
 
 ERRORS = \
+       E2BIG \
        EACCES \
        EAGAIN \
        EBADF \
+       EBADFD \
+       EBADR \
+       EBADRQC \
        EBUSY \
+       ECHILD \
+       ECONNRESET \
+       EDEADLK \
+       EDOM \
+       EEXIST \
        EFAULT \
-       EIO \
+       EFBIG \
+       EILSEQ \
+       EINIT \
+       EINPROGRESS \
        EINTR \
        EINVAL \
+       EIO \
+       EMFILE \
        ENFILE \
+       ENOBUFS \
+       ENODATA \
+       ENODEV \
+       ENOENT \
+       ENOIOCTLCMD \
        ENOMEM \
        ENOSPC \
+       ENOSR \
+       ENOSYS \
+       ENOTSUP \
+       ENOTSUPP \
        ENOTTY \
        ENXIO \
-       EMFILE \
+       EOPNOTSUPP \
+       EOVERFLOW \
        EPERM \
-       ERANGE \
        EPIPE \
+       EPROTO \
+       ERANGE \
+       EREMOTE \
+       EREMOTEIO \
+       ERESTART \
+       ERESTARTSYS \
+       ESHUTDOWN \
+       ESPIPE \
+       ETIME \
+       ETIMEDOUT \
+       EUSERS \
+       EWOULDBLOCK \
+       EXDEV \
 
 ESCAPE = \
        -e "s/&/\\&/g" \

diff --git a/Documentation/DocBook/media/v4l/gen-errors.xml b/Documentation/DocBook/media/v4l/gen-errors.xml
new file mode 100644 (file)
index 0000000..1efc688
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/gen-errors.xml
@@ -0,0 +1,17 @@
+<title>Generic Error Codes</title>
+
+<table frame="none" pgwide="1" id="gen-errors">
+  <title>Generic error codes</title>
+  <tgroup cols="2">
+    &cs-str;
+    <tbody valign="top">
+      <row>
+       <entry>EBUSY</entry>
+       <entry>The ioctl can't be handled because the device is busy. This is
+              typically return while device is streaming, and an ioctl tried to
+              change something that would affect the stream, or would require the
+              usage of a hardware resource that was already allocated.</entry>
+      </row>
+    </tbody>
+  </tgroup>
+</table>

diff --git a/Documentation/DocBook/media_api.tmpl b/Documentation/DocBook/media_api.tmpl
index 88f2cc6..c273e3c 100644 (file)
--- a/Documentation/DocBook/media_api.tmpl
+++ b/Documentation/DocBook/media_api.tmpl
@@ -8,7 +8,7 @@
 <!ENTITY ie                     "i.&nbsp;e.">
 <!ENTITY fd                     "File descriptor returned by <link linkend='func-open'><function>open()</function></link>.">
 <!ENTITY i2c                    "I<superscript>2</superscript>C">
-<!ENTITY return-value          "<title>Return Value</title><para>On success <returnvalue>0</returnvalue> is returned, on error <returnvalue>-1</returnvalue> and the <varname>errno</varname> variable is set appropriately:</para>">
+<!ENTITY return-value          "<title>Return Value</title><para>On success <returnvalue>0</returnvalue> is returned, on error <returnvalue>-1</returnvalue> and the <varname>errno</varname> variable is set appropriately. The generic error codes are described at the <link linkend='gen-errors'>Generic Error Codes</link> chapter.</para>">
 <!ENTITY manvol                 "<manvolnum>2</manvolnum>">
 
 <!-- Table templates: structs, structs w/union, defines. -->
@@ -110,6 +110,11 @@ Foundation. A copy of the license is included in the chapter entitled
 &sub-media-controller;
 </part>
 
+<chapter id="gen_errors">
+&sub-gen-errors;
+</chapter>
+
+
 &sub-fdl-appendix;
 
 </book>