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Subject[GIT PULL 44/58] lightnvm: pblk: fix releases of kmem cache in error path
Date
From: Rakesh Pandit <rakesh@tuxera.com>

If pblk_core_init fails lets destroy all global caches.

Signed-off-by: Rakesh Pandit <rakesh@tuxera.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
---
drivers/lightnvm/pblk-init.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 56ece7d..2e59973 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -220,6 +220,14 @@ static int pblk_init_global_caches(struct pblk *pblk)
return 0;
}

+static void pblk_free_global_caches(struct pblk *pblk)
+{
+ kmem_cache_destroy(pblk_ws_cache);
+ kmem_cache_destroy(pblk_rec_cache);
+ kmem_cache_destroy(pblk_g_rq_cache);
+ kmem_cache_destroy(pblk_w_rq_cache);
+}
+
static int pblk_core_init(struct pblk *pblk)
{
struct nvm_tgt_dev *dev = pblk->dev;
@@ -235,7 +243,7 @@ static int pblk_core_init(struct pblk *pblk)
pblk->page_bio_pool = mempool_create_page_pool(nvm_max_phys_sects(dev),
0);
if (!pblk->page_bio_pool)
- return -ENOMEM;
+ goto free_global_caches;

pblk->gen_ws_pool = mempool_create_slab_pool(PBLK_GEN_WS_POOL_SIZE,
pblk_ws_cache);
@@ -303,6 +311,8 @@ static int pblk_core_init(struct pblk *pblk)
mempool_destroy(pblk->gen_ws_pool);
free_page_bio_pool:
mempool_destroy(pblk->page_bio_pool);
+free_global_caches:
+ pblk_free_global_caches(pblk);
return -ENOMEM;
}

@@ -324,10 +334,7 @@ static void pblk_core_free(struct pblk *pblk)
mempool_destroy(pblk->e_rq_pool);
mempool_destroy(pblk->w_rq_pool);

- kmem_cache_destroy(pblk_ws_cache);
- kmem_cache_destroy(pblk_rec_cache);
- kmem_cache_destroy(pblk_g_rq_cache);
- kmem_cache_destroy(pblk_w_rq_cache);
+ pblk_free_global_caches(pblk);
}

static void pblk_luns_free(struct pblk *pblk)
--
2.9.3
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