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authorChristoph Hellwig <hch@lst.de>2014-04-14 10:30:10 +0200
committerJens Axboe <axboe@fb.com>2014-04-15 14:03:03 -0600
commited44832dea8a74f909e0187f350201402927f5e5 (patch)
tree995f626a425e9daef055a540ea7e6ff8ed559959 /block
parente9b267d91f6ddbc694cb40aa962b0b2cec03971d (diff)
blk-mq: initialize request on allocation
If we want to share tag and request allocation between queues we cannot initialize the request at init/free time, but need to initialize it at allocation time as it might get used for different queues over its lifetime. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 48d2d8495f5e..2a5a0fed10a3 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -82,6 +82,7 @@ static struct request *__blk_mq_alloc_request(struct blk_mq_hw_ctx *hctx,
tag = blk_mq_get_tag(hctx->tags, gfp, reserved);
if (tag != BLK_MQ_TAG_FAIL) {
rq = hctx->rqs[tag];
+ blk_rq_init(hctx->queue, rq);
rq->tag = tag;
return rq;
@@ -257,9 +258,7 @@ static void __blk_mq_free_request(struct blk_mq_hw_ctx *hctx,
const int tag = rq->tag;
struct request_queue *q = rq->q;
- blk_rq_init(hctx->queue, rq);
blk_mq_put_tag(hctx->tags, tag);
-
blk_mq_queue_exit(q);
}
@@ -1122,7 +1121,6 @@ static int blk_mq_init_rq_map(struct blk_mq_hw_ctx *hctx,
left -= to_do * rq_size;
for (j = 0; j < to_do; j++) {
hctx->rqs[i] = p;
- blk_rq_init(hctx->queue, hctx->rqs[i]);
if (reg->ops->init_request) {
error = reg->ops->init_request(driver_data,
hctx, hctx->rqs[i], i);