greybus: loopback: Convert thread delay to microseconds
Currently the loopback code allows a delay between operations specified in
milliseconds. Having added asynchronous bi-directional support to loopback
its obvious that the delay value would be far more useful specified in
microseconds than milliseconds. So, this patch makes the necessary
conversion.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
diff --git a/drivers/staging/greybus/loopback.c b/drivers/staging/greybus/loopback.c
index 392f985..b8297d6 100644
--- a/drivers/staging/greybus/loopback.c
+++ b/drivers/staging/greybus/loopback.c
@@ -86,7 +86,7 @@
u32 size;
u32 iteration_max;
u32 iteration_count;
- int ms_wait;
+ int us_wait;
u32 error;
u32 requests_completed;
u32 requests_timedout;
@@ -112,7 +112,7 @@
/* Maximum size of any one send data buffer we support */
#define MAX_PACKET_SIZE (PAGE_SIZE * 2)
-#define GB_LOOPBACK_MS_WAIT_MAX 1000
+#define GB_LOOPBACK_US_WAIT_MAX 1000000
/* interface sysfs attributes */
#define gb_loopback_ro_attr(field) \
@@ -237,8 +237,8 @@
static void gb_loopback_check_attr(struct gb_loopback *gb,
struct gb_bundle *bundle)
{
- if (gb->ms_wait > GB_LOOPBACK_MS_WAIT_MAX)
- gb->ms_wait = GB_LOOPBACK_MS_WAIT_MAX;
+ if (gb->us_wait > GB_LOOPBACK_US_WAIT_MAX)
+ gb->us_wait = GB_LOOPBACK_US_WAIT_MAX;
if (gb->size > gb_dev.size_max)
gb->size = gb_dev.size_max;
gb->requests_timedout = 0;
@@ -306,7 +306,7 @@
/* Size of transfer message payload: 0-4096 bytes */
gb_dev_loopback_rw_attr(size, u);
/* Time to wait between two messages: 0-1000 ms */
-gb_dev_loopback_rw_attr(ms_wait, d);
+gb_dev_loopback_rw_attr(us_wait, d);
/* Maximum iterations for a given operation: 1-(2^32-1), 0 implies infinite */
gb_dev_loopback_rw_attr(iteration_max, u);
/* The current index of the for (i = 0; i < iteration_max; i++) loop */
@@ -336,7 +336,7 @@
&dev_attr_gpbridge_firmware_latency_avg.attr,
&dev_attr_type.attr,
&dev_attr_size.attr,
- &dev_attr_ms_wait.attr,
+ &dev_attr_us_wait.attr,
&dev_attr_iteration_count.attr,
&dev_attr_iteration_max.attr,
&dev_attr_mask.attr,
@@ -925,7 +925,7 @@
static int gb_loopback_fn(void *data)
{
int error = 0;
- int ms_wait = 0;
+ int us_wait = 0;
int type;
u32 size;
u32 send_count = 0;
@@ -951,7 +951,7 @@
continue;
}
size = gb->size;
- ms_wait = gb->ms_wait;
+ us_wait = gb->us_wait;
type = gb->type;
mutex_unlock(&gb->mutex);
@@ -983,8 +983,8 @@
gb_loopback_calculate_stats(gb);
}
send_count++;
- if (ms_wait)
- msleep(ms_wait);
+ if (us_wait)
+ udelay(us_wait);
}
return 0;
}