[PATCH 16/30] aoe: use blk_mq_alloc_disk and blk_cleanup_disk

Christoph Hellwig
2021-06-02T07:23:15Z

Use blk_mq_alloc_disk and blk_cleanup_disk to simplify the gendisk and
request_queue allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/aoe/aoeblk.c | 33 ++++++++++++---------------------
drivers/block/aoe/aoedev.c | 3 +--
2 files changed, 13 insertions(+), 23 deletions(-)

diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index c34e71b0c4a9..06b360f7123a 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -338,14 +338,13 @@ static const struct blk_mq_ops aoeblk_mq_ops = {
.queue_rq = aoeblk_queue_rq,
};

-/* alloc_disk and add_disk can sleep */
+/* blk_mq_alloc_disk and add_disk can sleep */
void
aoeblk_gdalloc(void *vp)
{
struct aoedev *d = vp;
struct gendisk *gd;
mempool_t *mp;
- struct request_queue *q;
struct blk_mq_tag_set *set;
ulong flags;
int late = 0;
@@ -362,19 +361,12 @@ aoeblk_gdalloc(void *vp)
if (late)
return;

- gd = alloc_disk(AOE_PARTITIONS);
- if (gd == NULL) {
- pr_err("aoe: cannot allocate disk structure for %ld.%d\n",
- d->aoemajor, d->aoeminor);
- goto err;
- }
-
mp = mempool_create(MIN_BUFS, mempool_alloc_slab, mempool_free_slab,
buf_pool_cache);
if (mp == NULL) {
printk(KERN_ERR "aoe: cannot allocate bufpool for %ld.%d\n",
d->aoemajor, d->aoeminor);
- goto err_disk;
+ goto err;
}

set = &d->tag_set;
@@ -391,12 +383,11 @@ aoeblk_gdalloc(void *vp)
goto err_mempool;
}

- q = blk_mq_init_queue(set);
- if (IS_ERR(q)) {
+ gd = blk_mq_alloc_disk(set, d);
+ if (IS_ERR(gd)) {
pr_err("aoe: cannot allocate block queue for %ld.%d\n",
d->aoemajor, d->aoeminor);
- blk_mq_free_tag_set(set);
- goto err_mempool;
+ goto err_tagset;
}

spin_lock_irqsave(&d->lock, flags);
@@ -405,16 +396,16 @@ aoeblk_gdalloc(void *vp)
WARN_ON(d->flags & DEVFL_TKILL);
WARN_ON(d->gd);
WARN_ON(d->flags & DEVFL_UP);
- blk_queue_max_hw_sectors(q, BLK_DEF_MAX_SECTORS);
- blk_queue_io_opt(q, SZ_2M);
+ blk_queue_max_hw_sectors(gd->queue, BLK_DEF_MAX_SECTORS);
+ blk_queue_io_opt(gd->queue, SZ_2M);
d->bufpool = mp;
- d->blkq = gd->queue = q;
- q->queuedata = d;
+ d->blkq = gd->queue;
d->gd = gd;
if (aoe_maxsectors)
- blk_queue_max_hw_sectors(q, aoe_maxsectors);
+ blk_queue_max_hw_sectors(gd->queue, aoe_maxsectors);
gd->major = AOE_MAJOR;
gd->first_minor = d->sysminor;
+ gd->minors = AOE_PARTITIONS;
gd->fops = &aoe_bdops;
gd->private_data = d;
set_capacity(gd, d->ssize);
@@ -435,10 +426,10 @@ aoeblk_gdalloc(void *vp)
spin_unlock_irqrestore(&d->lock, flags);
return;

+err_tagset:
+ blk_mq_free_tag_set(set);
err_mempool:
mempool_destroy(mp);
-err_disk:
- put_disk(gd);
err:
spin_lock_irqsave(&d->lock, flags);
d->flags &= ~DEVFL_GD_NOW;
diff --git a/drivers/block/aoe/aoedev.c b/drivers/block/aoe/aoedev.c
index e2ea2356da06..c5753c6bfe80 100644
--- a/drivers/block/aoe/aoedev.c
+++ b/drivers/block/aoe/aoedev.c
@@ -277,9 +277,8 @@ freedev(struct aoedev *d)
if (d->gd) {
aoedisk_rm_debugfs(d);
del_gendisk(d->gd);
- put_disk(d->gd);
+ blk_cleanup_disk(d->gd);
blk_mq_free_tag_set(&d->tag_set);
- blk_cleanup_queue(d->blkq);
}
t = d->targets;
e = t + d->ntargets;