diff options
| author | Robert Elliott <elliott@hp.com> | 2014-09-02 11:38:49 -0500 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-09-02 15:39:03 -0600 |
| commit | dc501dc0d9dc9cbabc18b920f91a26c207e9476c (patch) | |
| tree | c86eefd1c630c97810f48cfc4e0aa5d4b77d7aae | |
| parent | 0738854939e6ec9b9111a8cfc0ca1dfa3cff6b2e (diff) | |
| download | linux-dc501dc0d9dc9cbabc18b920f91a26c207e9476c.tar.bz2 | |
blk-mq: pass along blk_mq_alloc_tag_set return values
Two of the blk-mq based drivers do not pass back the return value
from blk_mq_alloc_tag_set, instead just returning -ENOMEM.
blk_mq_alloc_tag_set returns -EINVAL if the number of queues or
queue depth is bad. -ENOMEM implies that retrying after freeing some
memory might be more successful, but that won't ever change
in the -EINVAL cases.
Change the null_blk and mtip32xx drivers to pass along
the return value.
Signed-off-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | drivers/block/mtip32xx/mtip32xx.c | 1 | ||||
| -rw-r--r-- | drivers/block/null_blk.c | 29 |
2 files changed, 21 insertions, 9 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index db1e9560d8a7..5c8e7fe07745 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -3918,7 +3918,6 @@ skip_create_disk: if (rv) { dev_err(&dd->pdev->dev, "Unable to allocate request queue\n"); - rv = -ENOMEM; goto block_queue_alloc_init_error; } diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index a3b042c4d448..00d469c7f9f7 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -462,17 +462,21 @@ static int null_add_dev(void) struct gendisk *disk; struct nullb *nullb; sector_t size; + int rv; nullb = kzalloc_node(sizeof(*nullb), GFP_KERNEL, home_node); - if (!nullb) + if (!nullb) { + rv = -ENOMEM; goto out; + } spin_lock_init(&nullb->lock); if (queue_mode == NULL_Q_MQ && use_per_node_hctx) submit_queues = nr_online_nodes; - if (setup_queues(nullb)) + rv = setup_queues(nullb); + if (rv) goto out_free_nullb; if (queue_mode == NULL_Q_MQ) { @@ -484,22 +488,29 @@ static int null_add_dev(void) nullb->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; nullb->tag_set.driver_data = nullb; - if (blk_mq_alloc_tag_set(&nullb->tag_set)) + rv = blk_mq_alloc_tag_set(&nullb->tag_set); + if (rv) goto out_cleanup_queues; nullb->q = blk_mq_init_queue(&nullb->tag_set); - if (!nullb->q) + if (!nullb->q) { + rv = -ENOMEM; goto out_cleanup_tags; + } } else if (queue_mode == NULL_Q_BIO) { nullb->q = blk_alloc_queue_node(GFP_KERNEL, home_node); - if (!nullb->q) + if (!nullb->q) { + rv = -ENOMEM; goto out_cleanup_queues; + } blk_queue_make_request(nullb->q, null_queue_bio); init_driver_queues(nullb); } else { nullb->q = blk_init_queue_node(null_request_fn, &nullb->lock, home_node); - if (!nullb->q) + if (!nullb->q) { + rv = -ENOMEM; goto out_cleanup_queues; + } blk_queue_prep_rq(nullb->q, null_rq_prep_fn); blk_queue_softirq_done(nullb->q, null_softirq_done_fn); init_driver_queues(nullb); @@ -509,8 +520,10 @@ static int null_add_dev(void) queue_flag_set_unlocked(QUEUE_FLAG_NONROT, nullb->q); disk = nullb->disk = alloc_disk_node(1, home_node); - if (!disk) + if (!disk) { + rv = -ENOMEM; goto out_cleanup_blk_queue; + } mutex_lock(&lock); list_add_tail(&nullb->list, &nullb_list); @@ -544,7 +557,7 @@ out_cleanup_queues: out_free_nullb: kfree(nullb); out: - return -ENOMEM; + return rv; } static int __init null_init(void) |