Lustre code lacks checking the result of register_shrinker()
in several places. register_shrinker() was tagged __must_check
recently so that sparse has started reporting it.
Signed-off-by: Aliaksei Karaliou <akaraliou....@gmail.com>
---
drivers/staging/lustre/lustre/ldlm/ldlm_pool.c | 12 +++++++++---
drivers/staging/lustre/lustre/obdclass/lu_object.c | 5 +++--
drivers/staging/lustre/lustre/osc/osc_request.c | 4 +++-
drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c | 8 +++++++-
4 files changed, 22 insertions(+), 7 deletions(-)
v2: Style fixes, as suggested by Cheers, Andreas and Dan Carpenter.
Added one more patch to address resource cleanup, suggested by Dan
Carpenter.
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
index da65d00a7811..9fef2d52d6c2 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
@@ -1086,10 +1086,16 @@ int ldlm_pools_init(void)
int rc;
rc = ldlm_pools_thread_start();
- if (rc == 0)
- register_shrinker(&ldlm_pools_cli_shrinker);
+ if (rc)
+ return rc;
- return rc;
+ rc = register_shrinker(&ldlm_pools_cli_shrinker);
+ if (rc) {
+ ldlm_pools_thread_stop();
+ return rc;
+ }
+
+ return 0;
}
void ldlm_pools_fini(void)
diff --git a/drivers/staging/lustre/lustre/obdclass/lu_object.c
b/drivers/staging/lustre/lustre/obdclass/lu_object.c
index b938a3f9d50a..9e0256ca2079 100644
--- a/drivers/staging/lustre/lustre/obdclass/lu_object.c
+++ b/drivers/staging/lustre/lustre/obdclass/lu_object.c
@@ -1951,7 +1951,7 @@ int lu_global_init(void)
* inode, one for ea. Unfortunately setting this high value results in
* lu_object/inode cache consuming all the memory.
*/
- register_shrinker(&lu_site_shrinker);
+ result = register_shrinker(&lu_site_shrinker);
return result;
}
@@ -1961,7 +1961,8 @@ int lu_global_init(void)
*/
void lu_global_fini(void)
{
- unregister_shrinker(&lu_site_shrinker);
+ if (lu_site_shrinker.nr_deferred)
+ unregister_shrinker(&lu_site_shrinker);
lu_context_key_degister(&lu_global_key);
/*
diff --git a/drivers/staging/lustre/lustre/osc/osc_request.c
b/drivers/staging/lustre/lustre/osc/osc_request.c
index 53eda4c99142..45b1ebf33363 100644
--- a/drivers/staging/lustre/lustre/osc/osc_request.c
+++ b/drivers/staging/lustre/lustre/osc/osc_request.c
@@ -2844,7 +2844,9 @@ static int __init osc_init(void)
if (rc)
goto out_kmem;
- register_shrinker(&osc_cache_shrinker);
+ rc = register_shrinker(&osc_cache_shrinker);
+ if (rc)
+ goto out_type;
/* This is obviously too much memory, only prevent overflow here */
if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0) {
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
index 77a3721beaee..485e7f15d850 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
@@ -396,6 +396,8 @@ static struct shrinker pools_shrinker = {
int sptlrpc_enc_pool_init(void)
{
+ int rc;
+
/*
* maximum capacity is 1/8 of total physical memory.
* is the 1/8 a good number?
@@ -432,7 +434,11 @@ int sptlrpc_enc_pool_init(void)
if (!page_pools.epp_pools)
return -ENOMEM;
- register_shrinker(&pools_shrinker);
+ rc = register_shrinker(&pools_shrinker);
+ if (rc) {
+ enc_pools_free();
+ return rc;
+ }
return 0;
}
--
2.11.0
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