diff options
Diffstat (limited to 'drivers/mtd/mtd_blkdevs.c')
| -rw-r--r-- | drivers/mtd/mtd_blkdevs.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index 9ff007c4962c..681d5aca2af4 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -32,6 +32,14 @@ struct mtd_blkcore_priv { spinlock_t queue_lock; }; +static int blktrans_discard_request(struct request_queue *q, + struct request *req) +{ + req->cmd_type = REQ_TYPE_LINUX_BLOCK; + req->cmd[0] = REQ_LB_OP_DISCARD; + return 0; +} + static int do_blktrans_request(struct mtd_blktrans_ops *tr, struct mtd_blktrans_dev *dev, struct request *req) @@ -44,6 +52,10 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr, buf = req->buffer; + if (req->cmd_type == REQ_TYPE_LINUX_BLOCK && + req->cmd[0] == REQ_LB_OP_DISCARD) + return !tr->discard(dev, block, nsect); + if (!blk_fs_request(req)) return 0; @@ -367,6 +379,10 @@ int register_mtd_blktrans(struct mtd_blktrans_ops *tr) tr->blkcore_priv->rq->queuedata = tr; blk_queue_hardsect_size(tr->blkcore_priv->rq, tr->blksize); + if (tr->discard) + blk_queue_set_discard(tr->blkcore_priv->rq, + blktrans_discard_request); + tr->blkshift = ffs(tr->blksize) - 1; tr->blkcore_priv->thread = kthread_run(mtd_blktrans_thread, tr, |