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authorJavier González <javier@cnexlabs.com>2018-01-05 14:16:04 +0100
committerJens Axboe <axboe@kernel.dk>2018-01-05 08:50:12 -0700
commite29c80e6dd70d60de5db305eecf1aecf707b02e8 (patch)
tree010bcc9b75eff3af63b0d39dd49aa068003ea299 /drivers/lightnvm
parentfae7fae4077c24dc2be720b9f21f53adea98d7dd (diff)
lightnvm: refactor target type lookup
Refactor target type lookup to use/not use locks explicitly instead of using a hidden parameter to make the function locking. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm')
-rw-r--r--drivers/lightnvm/core.c30
1 files changed, 17 insertions, 13 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 6d6d2c12ff5b..5c2d0f3a830b 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -220,21 +220,25 @@ static const struct block_device_operations nvm_fops = {
.owner = THIS_MODULE,
};
-static struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock)
+static struct nvm_tgt_type *__nvm_find_target_type(const char *name)
{
- struct nvm_tgt_type *tmp, *tt = NULL;
+ struct nvm_tgt_type *tt;
- if (lock)
- down_write(&nvm_tgtt_lock);
+ list_for_each_entry(tt, &nvm_tgt_types, list)
+ if (!strcmp(name, tt->name))
+ return tt;
- list_for_each_entry(tmp, &nvm_tgt_types, list)
- if (!strcmp(name, tmp->name)) {
- tt = tmp;
- break;
- }
+ return NULL;
+}
+
+static struct nvm_tgt_type *nvm_find_target_type(const char *name)
+{
+ struct nvm_tgt_type *tt;
+
+ down_write(&nvm_tgtt_lock);
+ tt = __nvm_find_target_type(name);
+ up_write(&nvm_tgtt_lock);
- if (lock)
- up_write(&nvm_tgtt_lock);
return tt;
}
@@ -249,7 +253,7 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
void *targetdata;
int ret;
- tt = nvm_find_target_type(create->tgttype, 1);
+ tt = nvm_find_target_type(create->tgttype);
if (!tt) {
pr_err("nvm: target type %s not found\n", create->tgttype);
return -EINVAL;
@@ -523,7 +527,7 @@ int nvm_register_tgt_type(struct nvm_tgt_type *tt)
int ret = 0;
down_write(&nvm_tgtt_lock);
- if (nvm_find_target_type(tt->name, 0))
+ if (__nvm_find_target_type(tt->name))
ret = -EEXIST;
else
list_add(&tt->list, &nvm_tgt_types);

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