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lightnvm: remove nvm_submit_io_sync_fn 

Move the redundant sync handling interface and wait for a completion in
the lightnvm core instead.

Reviewed-by: Javier González <javier@javigon.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Hans Holmberg <hans@owltronix.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Hans Holmberg 2019-07-31 11:41:33 +02:00 committed by Jens Axboe
parent 556f36e90d
commit 98d87f70f4
3 changed files with 29 additions and 37 deletions
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35
drivers/lightnvm/core.c
View File

@ -752,12 +752,36 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
}
EXPORT_SYMBOL(nvm_submit_io);
static void nvm_sync_end_io(struct nvm_rq *rqd)
{
struct completion *waiting = rqd->private;
complete(waiting);
}
static int nvm_submit_io_wait(struct nvm_dev *dev, struct nvm_rq *rqd)
{
DECLARE_COMPLETION_ONSTACK(wait);
int ret = 0;
rqd->end_io = nvm_sync_end_io;
rqd->private = &wait;
ret = dev->ops->submit_io(dev, rqd);
if (ret)
return ret;
wait_for_completion_io(&wait);
return 0;
}
int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
{
struct nvm_dev *dev = tgt_dev->parent;
int ret;
if (!dev->ops->submit_io_sync)
if (!dev->ops->submit_io)
return -ENODEV;
nvm_rq_tgt_to_dev(tgt_dev, rqd);
@ -765,9 +789,7 @@ int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
rqd->dev = tgt_dev;
rqd->flags = nvm_set_flags(&tgt_dev->geo, rqd);
/* In case of error, fail with right address format */
ret = dev->ops->submit_io_sync(dev, rqd);
nvm_rq_dev_to_tgt(tgt_dev, rqd);
ret = nvm_submit_io_wait(dev, rqd);
return ret;
}
@ -788,12 +810,13 @@ EXPORT_SYMBOL(nvm_end_io);
static int nvm_submit_io_sync_raw(struct nvm_dev *dev, struct nvm_rq *rqd)
{
if (!dev->ops->submit_io_sync)
if (!dev->ops->submit_io)
return -ENODEV;
rqd->dev = NULL;
rqd->flags = nvm_set_flags(&dev->geo, rqd);
return dev->ops->submit_io_sync(dev, rqd);
return nvm_submit_io_wait(dev, rqd);
}
static int nvm_bb_chunk_sense(struct nvm_dev *dev, struct ppa_addr ppa)

29
drivers/nvme/host/lightnvm.c
View File

@ -690,34 +690,6 @@ static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
return 0;
}
static int nvme_nvm_submit_io_sync(struct nvm_dev *dev, struct nvm_rq *rqd)
{
struct request_queue *q = dev->q;
struct request *rq;
struct nvme_nvm_command cmd;
int ret = 0;
memset(&cmd, 0, sizeof(struct nvme_nvm_command));
rq = nvme_nvm_alloc_request(q, rqd, &cmd);
if (IS_ERR(rq))
return PTR_ERR(rq);
/* I/Os can fail and the error is signaled through rqd. Callers must
* handle the error accordingly.
*/
blk_execute_rq(q, NULL, rq, 0);
if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
ret = -EINTR;
rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64);
rqd->error = nvme_req(rq)->status;
blk_mq_free_request(rq);
return ret;
}
static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name,
int size)
{
@ -754,7 +726,6 @@ static struct nvm_dev_ops nvme_nvm_dev_ops = {
.get_chk_meta = nvme_nvm_get_chk_meta,
.submit_io = nvme_nvm_submit_io,
.submit_io_sync = nvme_nvm_submit_io_sync,
.create_dma_pool = nvme_nvm_create_dma_pool,
.destroy_dma_pool = nvme_nvm_destroy_dma_pool,

2
include/linux/lightnvm.h
View File

@ -89,7 +89,6 @@ typedef int (nvm_op_set_bb_fn)(struct nvm_dev *, struct ppa_addr *, int, int);
typedef int (nvm_get_chk_meta_fn)(struct nvm_dev *, sector_t, int,
struct nvm_chk_meta *);
typedef int (nvm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
typedef int (nvm_submit_io_sync_fn)(struct nvm_dev *, struct nvm_rq *);
typedef void *(nvm_create_dma_pool_fn)(struct nvm_dev *, char *, int);
typedef void (nvm_destroy_dma_pool_fn)(void *);
typedef void *(nvm_dev_dma_alloc_fn)(struct nvm_dev *, void *, gfp_t,
@ -104,7 +103,6 @@ struct nvm_dev_ops {
nvm_get_chk_meta_fn *get_chk_meta;
nvm_submit_io_fn *submit_io;
nvm_submit_io_sync_fn *submit_io_sync;
nvm_create_dma_pool_fn *create_dma_pool;
nvm_destroy_dma_pool_fn *destroy_dma_pool;