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greybus: loopback: define loopback functions symbolically

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Add some symbols to indicate what kind of "function" the
loopback thread is supposed to be performing--the type of
traffic it generates over its connection.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Alex Elder 2015-05-11 21:16:38 -05:00 committed by Greg Kroah-Hartman
parent 91262c3ab7
commit 48cc8b8bba
1 changed files with 11 additions and 5 deletions
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16
drivers/staging/greybus/loopback.c
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@ -55,6 +55,12 @@ struct gb_loopback {
#define GB_LOOPBACK_TYPE_PING 0x02
#define GB_LOOPBACK_TYPE_TRANSFER 0x03
/* Current function (type of traffic generated by the loopback thread) */
#define GB_LOOPBACK_FN_NONE 0x00
#define GB_LOOPBACK_FN_PING 0x01
#define GB_LOOPBACK_FN_XFER 0x02
#define GB_LOOPBACK_FN_COUNT 0x03
#define GB_LOOPBACK_MS_WAIT_MAX 1000
#define GB_LOOPBACK_SIZE_MAX SZ_4K
@ -124,8 +130,8 @@ static void gb_loopback_check_attr(struct gb_loopback *gb)
{
if (gb->ms_wait > GB_LOOPBACK_MS_WAIT_MAX)
gb->ms_wait = GB_LOOPBACK_MS_WAIT_MAX;
if (gb->type > 2)
gb->type = 0;
if (gb->type >= GB_LOOPBACK_FN_COUNT)
gb->type = GB_LOOPBACK_FN_NONE;
if (gb->size > GB_LOOPBACK_SIZE_MAX)
gb->size = GB_LOOPBACK_SIZE_MAX;
gb->error = 0;
@ -310,13 +316,13 @@ static int gb_loopback_fn(void *data)
struct gb_loopback *gb = (struct gb_loopback *)data;
while (!kthread_should_stop()) {
if (gb->type == 0) {
if (gb->type == GB_LOOPBACK_FN_NONE) {
msleep(1000);
continue;
}
if (gb->type == 1)
if (gb->type == GB_LOOPBACK_FN_PING)
error = gb_loopback_ping(gb, &tlat);
if (gb->type == 2)
else if (gb->type == GB_LOOPBACK_FN_XFER)
error = gb_loopback_transfer(gb, &tlat, gb->size);
if (error)
gb->error++;