From 3a35c00b048ec368978cb497415c7a02f9200415 Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Wed, 15 Aug 2012 20:28:40 -0300 Subject: [PATCH] [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 Signed-off-by: Mauro Carvalho Chehab --- Documentation/DocBook/media/v4l/gen-errors.xml | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/Documentation/DocBook/media/v4l/gen-errors.xml b/Documentation/DocBook/media/v4l/gen-errors.xml index 5bbf3ce1973a..737ecaaa335d 100644 --- a/Documentation/DocBook/media/v4l/gen-errors.xml +++ b/Documentation/DocBook/media/v4l/gen-errors.xml @@ -7,6 +7,13 @@ + EAGAIN + 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. + + + EBADF The file descriptor is not a valid. @@ -51,11 +58,6 @@ for periodic transfers (up to 80% of the USB bandwidth). - ENOSYS or EOPNOTSUPP - Function not available for this device (dvb API only. Will likely - be replaced anytime soon by ENOTTY). - - EPERM Permission denied. Can be returned if the device needs write permission, or some special capabilities is needed -- 2.11.0