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authorRakesh Pandit <rakesh@tuxera.com>2017-04-20 21:23:56 +0300
committerJens Axboe <axboe@fb.com>2017-04-21 12:40:41 -0600
commit8d77bb8276062ff2d991bec71389520dd0156cc3 (patch)
treee2367341fba648d341aa0d11ca1408b944189836
parentabc25a693091e61537e40dfe24e8ee5deaf08208 (diff)
downloadlinux-0-day-8d77bb8276062ff2d991bec71389520dd0156cc3.tar.gz
linux-0-day-8d77bb8276062ff2d991bec71389520dd0156cc3.tar.xz
lightnvm: propagate pblk_init return to userspace
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: a4bd217b4326 ("lightnvm: physical block device (pblk) target") Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Signed-off-by: Jens Axboe <axboe@fb.com>
-rw-r--r--drivers/lightnvm/core.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 5d7aa45f2e042..54a06c3a2b8c7 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -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)