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greybus: loopback: functionally decompose calculation of turn-around times

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We have a pattern similar to this over and over again gb->elapsed_nsecs =
timeval_to_ns(&te) - timeval_to_ns(&ts); good software practice dictates we
functionally decompose this. This patch decomposes into
gb_loopback_calc_latency().

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Bryan O'Donoghue 2015-08-11 13:50:53 +01:00 • committed by Greg Kroah-Hartman
commit 4c192665f0
1 changed files with 13 additions and 3 deletions
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16
drivers/staging/greybus/loopback.c
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@ -219,6 +219,16 @@ static struct attribute *loopback_attrs[] = {
};
ATTRIBUTE_GROUPS(loopback);
static void gb_loopback_calc_latency(struct gb_loopback *gb,
struct timeval *ts, struct timeval *te)
{
u64 t1, t2;
t1 = timeval_to_ns(ts);
t2 = timeval_to_ns(te);
gb->elapsed_nsecs = t2 - t1;
}
static int gb_loopback_sink(struct gb_loopback *gb, u32 len)
{
struct timeval ts, te;
@ -236,7 +246,7 @@ static int gb_loopback_sink(struct gb_loopback *gb, u32 len)
request, len + sizeof(*request), NULL, 0);
do_gettimeofday(&te);
gb->elapsed_nsecs = timeval_to_ns(&te) - timeval_to_ns(&ts);
gb_loopback_calc_latency(gb, &ts, &te);
kfree(request);
return retval;
@ -265,7 +275,7 @@ static int gb_loopback_transfer(struct gb_loopback *gb, u32 len)
request, len + sizeof(*request),
response, len + sizeof(*response));
do_gettimeofday(&te);
gb->elapsed_nsecs = timeval_to_ns(&te) - timeval_to_ns(&ts);
gb_loopback_calc_latency(gb, &ts, &te);
if (retval)
goto gb_error;
@ -289,7 +299,7 @@ static int gb_loopback_ping(struct gb_loopback *gb)
retval = gb_operation_sync(gb->connection, GB_LOOPBACK_TYPE_PING,
NULL, 0, NULL, 0);
do_gettimeofday(&te);
gb->elapsed_nsecs = timeval_to_ns(&te) - timeval_to_ns(&ts);
gb_loopback_calc_latency(gb, &ts, &te);
return retval;
}