path: root/Documentation/DocBook/media/v4l
diff options
authorAntti Palosaari <crope@iki.fi>2012-08-15 20:28:40 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-09-10 11:28:50 -0300
commit3a35c00b048ec368978cb497415c7a02f9200415 (patch)
treeb355df639de495a2298d5d5fdb369d44a3738dd5 /Documentation/DocBook/media/v4l
parent177ffe506cf8ab5d1d52e7af36871a70d8c22e90 (diff)
[media] DocBook: update ioctl error codes
ENOTTY is now returned for unimplemented ioctl by dvb-frontend. Old EOPNOTSUPP & ENOSYS could be still returned by some drivers as well as other "non standard" error codes. EAGAIN is returned in case of device is in state where it cannot perform requested operation. This is for example sleep and statistics are queried. Quick check for few demodulator drivers reveals there is a lot of different error codes used in such case currently, few to mention still: EOPNOTSUPP, ENOSYS, EAGAIN ... Lets try harmonize. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/DocBook/media/v4l')
1 files changed, 7 insertions, 5 deletions
diff --git a/Documentation/DocBook/media/v4l/gen-errors.xml b/Documentation/DocBook/media/v4l/gen-errors.xml
index 5bbf3ce1973..737ecaaa335 100644
--- a/Documentation/DocBook/media/v4l/gen-errors.xml
+++ b/Documentation/DocBook/media/v4l/gen-errors.xml
@@ -7,6 +7,13 @@
<tbody valign="top">
<!-- Keep it ordered alphabetically -->
+ <entry>EAGAIN</entry>
+ <entry>The ioctl can't be handled because the device is in state where
+ it can't perform it. This could happen for example in case where
+ device is sleeping and ioctl is performed to query statistics.
+ </entry>
+ </row>
+ <row>
<entry>The file descriptor is not a valid.</entry>
@@ -51,11 +58,6 @@
for periodic transfers (up to 80% of the USB bandwidth).</entry>
- <entry>ENOSYS or EOPNOTSUPP</entry>
- <entry>Function not available for this device (dvb API only. Will likely
- be replaced anytime soon by ENOTTY).</entry>
- </row>
- <row>
<entry>Permission denied. Can be returned if the device needs write
permission, or some special capabilities is needed