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lightnvm: refactor end_io functions for sync

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To implement sync I/O support within the LightNVM core, the end_io
functions are refactored to take an end_io function pointer instead of
testing for initialized media manager, followed by calling its end_io
function.

Sync I/O can then be implemented using a callback that signal I/O
completion. This is similar to the logic found in blk_to_execute_io().
By implementing it this way, the underlying device I/Os submission logic
is abstracted away from core, targets, and media managers.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling
2016-01-12 07:49:21 +01:00
committed by Jens Axboe
parent abd805ec9f
commit 91276162de
6 changed files with 42 additions and 34 deletions
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5
drivers/nvme/host/lightnvm.c
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@@ -453,11 +453,8 @@ static inline void nvme_nvm_rqtocmd(struct request *rq, struct nvm_rq *rqd,
static void nvme_nvm_end_io(struct request *rq, int error)
{
struct nvm_rq *rqd = rq->end_io_data;
struct nvm_dev *dev = rqd->dev;
if (dev->mt && dev->mt->end_io(rqd, error))
pr_err("nvme: err status: %x result: %lx\n",
rq->errors, (unsigned long)rq->special);
nvm_end_io(rqd, error);
kfree(rq->cmd);
blk_mq_free_request(rq);