void bsg_remove_queue(struct request_queue *q)
{
struct request *req;
int counts;
if (!q)
return;
spin_lock_irq(q->queue_lock);
blk_stop_queue(q);
while (1) {
req = blk_fetch_request(q);
counts = q->rq.count[0] + q->rq.count[1] +
q->rq.starved[0] + q->rq.starved[1];
spin_unlock_irq(q->queue_lock);
if (counts == 0)
break;
if (req) {
req->errors = -ENXIO;
blk_end_request_all(req, -ENXIO);
}
msleep(200);
spin_lock_irq(q->queue_lock);
}
bsg_unregister_queue(q);
}
void bsg_remove_queue(struct request_queue *q)
{
if (q) {
struct bsg_set *bset =
container_of(q->tag_set, struct bsg_set, tag_set);
bsg_unregister_queue(q);
blk_cleanup_queue(q);
blk_mq_free_tag_set(&bset->tag_set);
kfree(bset);
}
}
/**
* bsg_remove_queue - Deletes the bsg dev from the q
* @q: the request_queue that is to be torn down.
*
* Notes:
* Before unregistering the queue empty any requests that are blocked
*/
void bsg_remove_queue(struct request_queue *q)
{
struct request *req; /* block request */
int counts; /* totals for request_list count and starved */
if (!q)
return;
/* Stop taking in new requests */
spin_lock_irq(q->queue_lock);
blk_stop_queue(q);
/* drain all requests in the queue */
while (1) {
/* need the lock to fetch a request
* this may fetch the same reqeust as the previous pass
*/
req = blk_fetch_request(q);
/* save requests in use and starved */
counts = q->root_rl.count[0] + q->root_rl.count[1] +
q->root_rl.starved[0] + q->root_rl.starved[1];
spin_unlock_irq(q->queue_lock);
/* any requests still outstanding? */
if (counts == 0)
break;
/* This may be the same req as the previous iteration,
* always send the blk_end_request_all after a prefetch.
* It is not okay to not end the request because the
* prefetch started the request.
*/
if (req) {
/* return -ENXIO to indicate that this queue is
* going away
*/
req->errors = -ENXIO;
blk_end_request_all(req, -ENXIO);
}
msleep(200); /* allow bsg to possibly finish */
spin_lock_irq(q->queue_lock);
}
bsg_unregister_queue(q);
}
