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staging: comedi: comedi_test: use unsigned short for loopback values 

The last sample values written to the AO subdevice channels by its
"insn_write" handler `waveform_ao_insn_write()` are stored in the member
array `ao_loopbacks[]` in the device private data `struct
waveform_private`.  They can be read back via the "insn_read" handler of
the AI subdevice `waveform_ai_insn_read()`.  As the stored sample values
are only 16 bits wide, change the type of the `ao_loopbacks[]` member to
`unsigned short` to save some space.

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>
This commit is contained in:
Ian Abbott 2015-10-27 16:59:21 +00:00 committed by Greg Kroah-Hartman
parent 4e5ffbf29c
commit 3b2468fe98
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/comedi/drivers/comedi_test.c
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@ -70,7 +70,7 @@ struct waveform_private {
unsigned long state_bits;
unsigned int ai_scan_period; /* AI scan period in usec */
unsigned int ai_convert_period; /* AI conversion period in usec */
unsigned int ao_loopbacks[N_CHANS];
unsigned short ao_loopbacks[N_CHANS];
};
/* fake analog input ranges */