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lightnvm: propagate pblk_init return to userspace

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From userspace calling ioctl(NVM_DEV_CREATE) was returning ENOMEM for
invalid arguments even though pblk (pblk_init) was returning correctly
-EINVAL to nvm_create_tgt inside core.  This patch propagates the
correct return value to userspace.

Because pblk was introduced recently this only needs to go in 4.12.

Fixes: a4bd217b43 ("lightnvm: physical block device (pblk) target")
Signed-off-by: Rakesh Pandit <rakesh@tuxera.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Rakesh Pandit 2017-04-20 21:23:56 +03:00 committed by Jens Axboe
parent abc25a6930
commit 8d77bb8276
1 changed files with 18 additions and 6 deletions
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24
drivers/lightnvm/core.c
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@ -235,6 +235,7 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
struct nvm_target *t;
struct nvm_tgt_dev *tgt_dev;
void *targetdata;
int ret;
tt = nvm_find_target_type(create->tgttype, 1);
if (!tt) {
@ -255,22 +256,29 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
return -ENOMEM;
t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
if (!t)
if (!t) {
ret = -ENOMEM;
goto err_reserve;
}
tgt_dev = nvm_create_tgt_dev(dev, s->lun_begin, s->lun_end);
if (!tgt_dev) {
pr_err("nvm: could not create target device\n");
ret = -ENOMEM;
goto err_t;
}
tdisk = alloc_disk(0);
if (!tdisk)
if (!tdisk) {
ret = -ENOMEM;
goto err_dev;
}
tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
if (!tqueue)
if (!tqueue) {
ret = -ENOMEM;
goto err_disk;
}
blk_queue_make_request(tqueue, tt->make_rq);
strlcpy(tdisk->disk_name, create->tgtname, sizeof(tdisk->disk_name));
@ -281,8 +289,10 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
tdisk->queue = tqueue;
targetdata = tt->init(tgt_dev, tdisk, create->flags);
if (IS_ERR(targetdata))
if (IS_ERR(targetdata)) {
ret = PTR_ERR(targetdata);
goto err_init;
}
tdisk->private_data = targetdata;
tqueue->queuedata = targetdata;
@ -292,8 +302,10 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
set_capacity(tdisk, tt->capacity(targetdata));
add_disk(tdisk);
if (tt->sysfs_init && tt->sysfs_init(tdisk))
if (tt->sysfs_init && tt->sysfs_init(tdisk)) {
ret = -ENOMEM;
goto err_sysfs;
}
t->type = tt;
t->disk = tdisk;
@ -318,7 +330,7 @@ err_t:
kfree(t);
err_reserve:
nvm_release_luns_err(dev, s->lun_begin, s->lun_end);
return -ENOMEM;
return ret;
}
static void __nvm_remove_target(struct nvm_target *t)