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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
commite5fd91f1ef340da553f7a79da9540c3db711c937 (patch)
treeb11842027dc6641da63f4bcc524f8678263304a3 /drivers/block/null_blk.c
parent2a9b0348e685a63d97486f6749622b61e9e3292f (diff)
Linux-libre 4.2-gnu
Diffstat (limited to 'drivers/block/null_blk.c')
-rw-r--r--drivers/block/null_blk.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index 65cd61a41..3177b245d 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -99,7 +99,7 @@ static int null_set_queue_mode(const char *str, const struct kernel_param *kp)
return null_param_store_val(str, &queue_mode, NULL_Q_BIO, NULL_Q_MQ);
}
-static struct kernel_param_ops null_queue_mode_param_ops = {
+static const struct kernel_param_ops null_queue_mode_param_ops = {
.set = null_set_queue_mode,
.get = param_get_int,
};
@@ -127,7 +127,7 @@ static int null_set_irqmode(const char *str, const struct kernel_param *kp)
NULL_IRQ_TIMER);
}
-static struct kernel_param_ops null_irqmode_param_ops = {
+static const struct kernel_param_ops null_irqmode_param_ops = {
.set = null_set_irqmode,
.get = param_get_int,
};
@@ -240,9 +240,20 @@ static enum hrtimer_restart null_cmd_timer_expired(struct hrtimer *timer)
while ((entry = llist_del_all(&cq->list)) != NULL) {
entry = llist_reverse_order(entry);
do {
+ struct request_queue *q = NULL;
+
cmd = container_of(entry, struct nullb_cmd, ll_list);
entry = entry->next;
+ if (cmd->rq)
+ q = cmd->rq->q;
end_cmd(cmd);
+
+ if (q && !q->mq_ops && blk_queue_stopped(q)) {
+ spin_lock(q->queue_lock);
+ if (blk_queue_stopped(q))
+ blk_start_queue(q);
+ spin_unlock(q->queue_lock);
+ }
} while (entry);
}
@@ -257,7 +268,7 @@ static void null_cmd_end_timer(struct nullb_cmd *cmd)
if (llist_add(&cmd->ll_list, &cq->list)) {
ktime_t kt = ktime_set(0, completion_nsec);
- hrtimer_start(&cq->timer, kt, HRTIMER_MODE_REL);
+ hrtimer_start(&cq->timer, kt, HRTIMER_MODE_REL_PINNED);
}
put_cpu();
@@ -334,6 +345,7 @@ static int null_rq_prep_fn(struct request_queue *q, struct request *req)
req->special = cmd;
return BLKPREP_OK;
}
+ blk_stop_queue(q);
return BLKPREP_DEFER;
}