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copy: fix race on shutdown

This commit is contained in:
Thomas Schoebel-Theuer 2019-01-31 20:31:38 +01:00 committed by Thomas Schoebel-Theuer
parent 5ad1645de9
commit a6fbb93394
2 changed files with 9 additions and 5 deletions
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13
kernel/mars_copy.c
View File

@ -867,7 +867,7 @@ static int _copy_thread(void *data)
brick->copy_end);
_clear_all_mref(brick);
mars_power_led_off((void*)brick, true);
brick->terminated = true;
MARS_DBG("--------------- copy_thread done.\n");
return 0;
}
@ -921,20 +921,22 @@ static int copy_switch(struct copy_brick *brick)
static int version = 0;
MARS_DBG("power.button = %d\n", brick->power.button);
if (brick->power.button) {
if (brick->power.led_on)
if (brick->power.button && !brick->terminated) {
if (brick->power.led_on || brick->thread)
goto done;
mars_power_led_off((void*)brick, false);
mars_power_led_on((void*)brick, true);
brick->is_aborting = false;
if (!brick->thread) {
brick->copy_last = brick->copy_start;
brick->copy_dirty = 0;
brick->terminated = false;
mars_power_led_on((void*)brick, true);
get_lamport(NULL, &brick->copy_last_stamp);
brick->thread = brick_thread_create(_copy_thread, brick, "mars_copy%d", version++);
if (brick->thread) {
brick->trigger = true;
} else {
mars_power_led_on((void*)brick, false);
mars_power_led_off((void*)brick, true);
MARS_ERR("could not start copy thread\n");
}
@ -944,13 +946,14 @@ static int copy_switch(struct copy_brick *brick)
mars_power_led_on((void*)brick, false);
if (brick->thread) {
/* Notice: this will be reported by the thread */
if (brick->power.led_off)
if (!brick->terminated)
goto done;
MARS_INF("stopping thread...\n");
brick_thread_stop(brick->thread);
}
/* for safety, and when the thread was not started */
mars_power_led_off((void*)brick, true);
brick->terminated = false;
}
done:
return 0;

1
kernel/mars_copy.h
View File

@ -98,6 +98,7 @@ struct copy_brick {
bool is_aborting;
// internal
bool trigger;
bool terminated;
unsigned long clash;
atomic_t total_clash_count;
atomic_t io_flight;