diff options
author | Ian Abbott <abbotti@mev.co.uk> | 2015-10-12 17:21:27 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-13 10:29:48 -0700 |
commit | a8ed75c0836ebc530f7fbf613bba75de3656b105 (patch) | |
tree | e790c2e7376c4303a5e5a7b21deb0bb28520c6f0 /Documentation/ntb.txt | |
parent | f84e27adfc4cb0c4aa97d830c43f8c82aca0547c (diff) |
staging: comedi: return error on "read" if no command set up
The "read" file operation handler, `comedi_read()` returns an error for
pretty much any condition that prevents a "read" going ahead. One of
the conditions that prevents a "read" going ahead is that no
asynchronous command has been set up, but that currently results in a
return value of 0 (unless COMEDI instructions are being processed or an
asynchronous command has been set up by a different file object).
Change it to return `-EINVAL` in this case.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ntb.txt')
0 files changed, 0 insertions, 0 deletions