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-rw-r--r--block/bsg-lib.c53
1 files changed, 0 insertions, 53 deletions
diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index 7ad49c88f6b1..deee61fbb741 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -243,56 +243,3 @@ int bsg_setup_queue(struct device *dev, struct request_queue *q,
243 return 0; 243 return 0;
244} 244}
245EXPORT_SYMBOL_GPL(bsg_setup_queue); 245EXPORT_SYMBOL_GPL(bsg_setup_queue);
246
247/**
248 * bsg_remove_queue - Deletes the bsg dev from the q
249 * @q: the request_queue that is to be torn down.
250 *
251 * Notes:
252 * Before unregistering the queue empty any requests that are blocked
253 */
254void bsg_remove_queue(struct request_queue *q)
255{
256 struct request *req; /* block request */
257 int counts; /* totals for request_list count and starved */
258
259 if (!q)
260 return;
261
262 /* Stop taking in new requests */
263 spin_lock_irq(q->queue_lock);
264 blk_stop_queue(q);
265
266 /* drain all requests in the queue */
267 while (1) {
268 /* need the lock to fetch a request
269 * this may fetch the same reqeust as the previous pass
270 */
271 req = blk_fetch_request(q);
272 /* save requests in use and starved */
273 counts = q->rq.count[0] + q->rq.count[1] +
274 q->rq.starved[0] + q->rq.starved[1];
275 spin_unlock_irq(q->queue_lock);
276 /* any requests still outstanding? */
277 if (counts == 0)
278 break;
279
280 /* This may be the same req as the previous iteration,
281 * always send the blk_end_request_all after a prefetch.
282 * It is not okay to not end the request because the
283 * prefetch started the request.
284 */
285 if (req) {
286 /* return -ENXIO to indicate that this queue is
287 * going away
288 */
289 req->errors = -ENXIO;
290 blk_end_request_all(req, -ENXIO);
291 }
292
293 msleep(200); /* allow bsg to possibly finish */
294 spin_lock_irq(q->queue_lock);
295 }
296 bsg_unregister_queue(q);
297}
298EXPORT_SYMBOL_GPL(bsg_remove_queue);