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staging: comedi: Improved readability of function comedi_nsamples_left.

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Improve readability of comedi_nsamples_left:
a) Reduce nesting by using more return statements.
b) Declare variables scans_left and samples_left at start of function.
c) Change type of scans_Left to unsigned long long to avoid cast.

Signed-off-by: Chris Opperman <eklikeroomys@gmail.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chris Opperman 2018-06-13 19:14:35 +02:00 committed by Greg Kroah-Hartman
parent fbe1be81b2
commit 2665df5101
1 changed files with 12 additions and 12 deletions
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24
drivers/staging/comedi/drivers.c
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@ -473,21 +473,21 @@ unsigned int comedi_nsamples_left(struct comedi_subdevice *s,
{
struct comedi_async *async = s->async;
struct comedi_cmd *cmd = &async->cmd;
unsigned long long scans_left;
unsigned long long samples_left;
if (cmd->stop_src == TRIG_COUNT) {
unsigned int scans_left = __comedi_nscans_left(s, cmd->stop_arg);
unsigned int scan_pos =
comedi_bytes_to_samples(s, async->scan_progress);
unsigned long long samples_left = 0;
if (cmd->stop_src != TRIG_COUNT)
return nsamples;
if (scans_left) {
samples_left = ((unsigned long long)scans_left *
cmd->scan_end_arg) - scan_pos;
}
scans_left = __comedi_nscans_left(s, cmd->stop_arg);
if (!scans_left)
return 0;
if (samples_left < nsamples)
nsamples = samples_left;
}
samples_left = scans_left * cmd->scan_end_arg -
comedi_bytes_to_samples(s, async->scan_progress);
if (samples_left < nsamples)
return samples_left;
return nsamples;
}
EXPORT_SYMBOL_GPL(comedi_nsamples_left);