diff options
| author | Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> | 2019-08-22 21:45:17 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-08-23 06:58:05 -0600 |
| commit | 7ea88e229e9df18ecd624b0d39f3dba87432ba33 (patch) | |
| tree | 44cc348085bbf9b3b435f5ab19d83dd2fc7b71dc /drivers/block | |
| parent | 8f94d1c1dc1e1094ef83fcadf1b992cf8ff7869e (diff) | |
| download | linux-7ea88e229e9df18ecd624b0d39f3dba87432ba33.tar.gz | |
null_blk: create a helper for mem-backed ops
This patch creates a helper for handling requests when null_blk is memory backed in the null_handle_cmd(). Although the helper is very simple right now, it makes the code flow consistent with the rest of code in the null_handle_cmd() and provides a uniform code structure for future code. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/null_blk_main.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index eefaea1aaa45..4299274cccfb 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -1168,13 +1168,26 @@ static inline blk_status_t null_handle_badblocks(struct nullb_cmd *cmd, return BLK_STS_OK; } +static inline blk_status_t null_handle_memory_backed(struct nullb_cmd *cmd, + enum req_opf op) +{ + struct nullb_device *dev = cmd->nq->dev; + int err; + + if (dev->queue_mode == NULL_Q_BIO) + err = null_handle_bio(cmd); + else + err = null_handle_rq(cmd); + + return errno_to_blk_status(err); +} + static blk_status_t null_handle_cmd(struct nullb_cmd *cmd, sector_t sector, sector_t nr_sectors, enum req_opf op) { struct nullb_device *dev = cmd->nq->dev; struct nullb *nullb = dev->nullb; blk_status_t sts; - int err = 0; if (test_bit(NULLB_DEV_FL_THROTTLED, &dev->flags)) { sts = null_handle_throttled(cmd); @@ -1193,14 +1206,8 @@ static blk_status_t null_handle_cmd(struct nullb_cmd *cmd, sector_t sector, goto out; } - if (dev->memory_backed) { - if (dev->queue_mode == NULL_Q_BIO) - err = null_handle_bio(cmd); - else - err = null_handle_rq(cmd); - } - - cmd->error = errno_to_blk_status(err); + if (dev->memory_backed) + cmd->error = null_handle_memory_backed(cmd, op); if (!cmd->error && dev->zoned) { if (op == REQ_OP_WRITE) |