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authorIan Abbott <abbotti@mev.co.uk>2015-11-18 17:55:10 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-12-21 15:58:54 -0800
commit3318c7add8b43a071498a973548dd24b55c587d4 (patch)
tree181e0ed5c02e2115fcef85c2423d002850f416f4 /net/ax25/ax25_out.c
parent40d0e80e08012ac99b187cbaaeb8aab92b71714d (diff)
staging: comedi: simplify returned errors for comedi_write()
In order to perform a "write" file operation, an asynchronous COMEDI command in the "write" direction needs to have been set up by the current file object on the COMEDI "write" subdevice associated with the file object. If there is a "write" subdevice, but a command has not been set up by the file object (or is has been set-up in the wrong direction), `comedi_write()` currently returns one of two error values `-EINVAL` or `-EACCES`. `-EACCES` is returned if the command was set up by a different subdevice, or somewhat randomly, if a COMEDI "instruction" is currently being processed. `-EINVAL` is returned in other cases. Simplify it by returning `-EINVAL` for all these cases. 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 'net/ax25/ax25_out.c')
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