media: dvb uAPI docs: adjust return value ioctl descriptions

There are several issues on the return value for ioctls:

- Text is confusing;
- Some error codes don't exist;
- The non-generic error codes should come before the text
  that points to the generic error codes;
- Tables don't contain column size hints;
- Some references are not marked as such.

Correct them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/Documentation/media/uapi/dvb/fe-read-snr.rst b/Documentation/media/uapi/dvb/fe-read-snr.rst
index 2aed487f5c99..6db22c043512 100644
--- a/Documentation/media/uapi/dvb/fe-read-snr.rst
+++ b/Documentation/media/uapi/dvb/fe-read-snr.rst
@@ -41,6 +41,10 @@ to the device is sufficient.
 Return Value
 ============
 
-On success 0 is returned, on error -1 and the ``errno`` variable is set
-appropriately. The generic error codes are described at the
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
 :ref:`Generic Error Codes <gen-errors>` chapter.