[media] DocBook: Use the generic error code page also for MC API

Instead of having their own generic error codes at the MC API, move
its section to the generic one and be sure that all media ioctl's
will point to it.

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

3 files changed, 18 insertions, 49 deletions

diff --git a/Documentation/DocBook/media/v4l/gen-errors.xml b/Documentation/DocBook/media/v4l/gen-errors.xml
index 6ef476a54016..9bf9ca7f46dc 100644
--- a/Documentation/DocBook/media/v4l/gen-errors.xml
+++ b/Documentation/DocBook/media/v4l/gen-errors.xml
@@ -5,6 +5,11 @@
   <tgroup cols="2">
     &cs-str;
     <tbody valign="top">
+        <!-- Keep it ordered alphabetically -->
+      <row>
+        <entry>EBADF</entry>
+        <entry><parameter>fd</parameter> is not a valid open file descriptor.</entry>
+      </row>
       <row>
         <entry>EBUSY</entry>
         <entry>The ioctl can't be handled because the device is busy. This is
@@ -15,7 +20,16 @@
                problem first (typically: stop the stream before retrying).</entry>
       </row>
       <row>
+        <entry>EFAULT</entry>
+        <entry><parameter>fd</parameter> is not a valid open file descriptor.</entry>
+      </row>
+      <row>
         <entry>EINVAL</entry>
+        <entry>One or more of the ioctl parameters are invalid. This is a widely
+               used error code. See the individual ioctl requests for actual causes.</entry>
+      </row>
+      <row>
+        <entry>EINVAL or ENOTTY</entry>
         <entry>The ioctl is not supported by the driver, actually meaning that
                the required functionality is not available.</entry>
       </row>
@@ -25,7 +39,7 @@
       </row>
       <row>
         <entry>ENOSPC</entry>
-        <entry>On USB devices, the stream ioctl's can return this error meaning
+        <entry>On USB devices, the stream ioctl's can return this error, meaning
                that this request would overcommit the usb bandwidth reserved
                for periodic transfers (up to 80% of the USB bandwidth).</entry>
       </row>
diff --git a/Documentation/DocBook/media/v4l/media-func-ioctl.xml b/Documentation/DocBook/media/v4l/media-func-ioctl.xml
index bda8604de15c..e0ee285baf1c 100644
--- a/Documentation/DocBook/media/v4l/media-func-ioctl.xml
+++ b/Documentation/DocBook/media/v4l/media-func-ioctl.xml
@@ -63,54 +63,10 @@
   </refsect1>
 
   <refsect1>
-    <title>Return Value</title>
-
-    <para><function>ioctl()</function> returns <returnvalue>0</returnvalue> on
-    success. On failure, <returnvalue>-1</returnvalue> is returned, and the
-    <varname>errno</varname> variable is set appropriately. Generic error codes
-    are listed below, and request-specific error codes are listed in the
+    &return-value;
+    <para>Request-specific error codes are listed in the
     individual requests descriptions.</para>
     <para>When an ioctl that takes an output or read/write parameter fails,
     the parameter remains unmodified.</para>
-
-    <variablelist>
-      <varlistentry>
-        <term><errorcode>EBADF</errorcode></term>
-        <listitem>
-          <para><parameter>fd</parameter> is not a valid open file descriptor.
-          </para>
-        </listitem>
-      </varlistentry>
-      <varlistentry>
-        <term><errorcode>EFAULT</errorcode></term>
-        <listitem>
-          <para><parameter>argp</parameter> references an inaccessible memory
-          area.</para>
-        </listitem>
-      </varlistentry>
-      <varlistentry>
-        <term><errorcode>EINVAL</errorcode></term>
-        <listitem>
-          <para>The <parameter>request</parameter> or the data pointed to by
-          <parameter>argp</parameter> is not valid. This is a very common error
-          code, see the individual ioctl requests listed in
-          <xref linkend="media-user-func" /> for actual causes.</para>
-        </listitem>
-      </varlistentry>
-      <varlistentry>
-        <term><errorcode>ENOMEM</errorcode></term>
-        <listitem>
-          <para>Insufficient kernel memory was available to complete the
-          request.</para>
-        </listitem>
-      </varlistentry>
-      <varlistentry>
-        <term><errorcode>ENOTTY</errorcode></term>
-        <listitem>
-          <para><parameter>fd</parameter> is  not  associated  with  a character
-          special device.</para>
-        </listitem>
-      </varlistentry>
-    </variablelist>
   </refsect1>
 </refentry>
diff --git a/Documentation/DocBook/media/v4l/media-ioc-device-info.xml b/Documentation/DocBook/media/v4l/media-ioc-device-info.xml
index 1f3237351bba..2ce521419e67 100644
--- a/Documentation/DocBook/media/v4l/media-ioc-device-info.xml
+++ b/Documentation/DocBook/media/v4l/media-ioc-device-info.xml
@@ -127,7 +127,6 @@
   </refsect1>
 
   <refsect1>
-    <title>Return value</title>
-    <para>This function doesn't return specific error codes.</para>
+    &return-value;
   </refsect1>
 </refentry>