diff options
| author | Max Gurtovoy <maxg@mellanox.com> | 2017-07-06 18:00:07 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-07-06 18:52:09 +0300 |
| commit | db2d153d7a3d64618659f19e645a3351d3a732f3 (patch) | |
| tree | 96849f497221488c9ec04cc0c06afbb2510ac9c2 /drivers/block/null_blk.c | |
| parent | 615d22a51c04856efe62af6e1d5b450aaf5cc2c0 (diff) | |
| download | linux-db2d153d7a3d64618659f19e645a3351d3a732f3.tar.xz | |
null_blk: fix error flow for shared tags during module_init
In case we use shared tags feature, blk_mq_alloc_tag_set might fail
during module initialization. In that case, fail the load with a
suitable error code. Also move the tagset initialization process after
defining the amount of submission queues.
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/null_blk.c')
| -rw-r--r-- | drivers/block/null_blk.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index 71f4422eba81..85c24cace973 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -844,9 +844,6 @@ static int __init null_init(void) queue_mode = NULL_Q_MQ; } - if (queue_mode == NULL_Q_MQ && shared_tags) - null_init_tag_set(&tag_set); - if (queue_mode == NULL_Q_MQ && use_per_node_hctx) { if (submit_queues < nr_online_nodes) { pr_warn("null_blk: submit_queues param is set to %u.", @@ -858,11 +855,19 @@ static int __init null_init(void) else if (!submit_queues) submit_queues = 1; + if (queue_mode == NULL_Q_MQ && shared_tags) { + ret = null_init_tag_set(&tag_set); + if (ret) + return ret; + } + mutex_init(&lock); null_major = register_blkdev(0, "nullb"); - if (null_major < 0) - return null_major; + if (null_major < 0) { + ret = null_major; + goto err_tagset; + } if (use_lightnvm) { ppa_cache = kmem_cache_create("ppa_cache", 64 * sizeof(u64), @@ -891,6 +896,9 @@ err_dev: kmem_cache_destroy(ppa_cache); err_ppa: unregister_blkdev(null_major, "nullb"); +err_tagset: + if (queue_mode == NULL_Q_MQ && shared_tags) + blk_mq_free_tag_set(&tag_set); return ret; } |