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Commit c2939f41 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

greybus: loopback: add poll support to the iteration_count sysfs file 



This adds the ability to poll on "iteration_count" in sysfs and be woken
up when it changes, saving some cycles constantly hammering on the file
waiting for it to change.

Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@google.com>
Tested-by: default avatarBryan O'Donoghue <bryan.odonoghue@linaro.org>
parent 701615f8

drivers/staging/greybus/loopback.c

+2 −1
Original line number Diff line number Diff line
@@ -141,7 +141,6 @@ gb_loopback_stats_attrs(throughput); 
gb_loopback_ro_attr(error, d);

/* The current index of the for (i = 0; i < iteration_max; i++) loop */

gb_loopback_ro_attr(iteration_count, u);

/* TODO iteration_count might be better with the KOBJ_CHANGE event */



/*

 * Type of loopback message to send based on protocol type definitions
@@ -406,6 +405,8 @@ static int gb_loopback_fn(void *data) 
		if (gb->iteration_max) {

			if (gb->iteration_count < gb->iteration_max) {

				gb->iteration_count++;

				sysfs_notify(&gb->connection->dev.kobj, NULL,

					     "iteration_count");

			} else {

				gb->type = 0;

				continue;