[media] v4l2 core: return -ENOTTY if an ioctl doesn't exist

Currently, -EINVAL is used to return either when an IOCTL is not
implemented, or if the ioctl was not implemented.

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

2 files changed, 8 insertions, 7 deletions

diff --git a/Documentation/DocBook/media/v4l/gen-errors.xml b/Documentation/DocBook/media/v4l/gen-errors.xml
index 7c1980e8747b..5bbf3ce1973a 100644
--- a/Documentation/DocBook/media/v4l/gen-errors.xml
+++ b/Documentation/DocBook/media/v4l/gen-errors.xml
@@ -31,13 +31,6 @@
                ioctl requests for specific 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, or the file
-               descriptor is not for a media device. The usage of EINVAL is
-               deprecated and will be fixed on a latter patch.</entry>
-      </row>
-      <row>
         <entry>ENODEV</entry>
         <entry>Device not found or was removed.</entry>
       </row>
@@ -46,6 +39,12 @@
         <entry>There's not enough memory to handle the desired operation.</entry>
       </row>
       <row>
+        <entry>ENOTTY</entry>
+        <entry>The ioctl is not supported by the driver, actually meaning that
+               the required functionality is not available, or the file
+               descriptor is not for a media device.</entry>
+      </row>
+      <row>
         <entry>ENOSPC</entry>
         <entry>On USB devices, the stream ioctl's can return this error, meaning
                that this request would overcommit the usb bandwidth reserved
diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml
index c5ee3982cff5..43386a6aef76 100644
--- a/Documentation/DocBook/media/v4l/v4l2.xml
+++ b/Documentation/DocBook/media/v4l/v4l2.xml
@@ -132,7 +132,9 @@ applications. -->
         <date>2011-06-27</date>
         <authorinitials>mcc, po</authorinitials>
         <revremark>Documented that VIDIOC_QUERYCAP now returns a per-subsystem version instead of a per-driver one.</revremark>
+        <revremark>Standardize an error code for invalid ioctl.</revremark>
       </revision>
+
       <revision>
         <revnumber>2.6.39</revnumber>
         <date>2011-03-01</date>