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-rw-r--r--fs/nfs/delegation.c21
1 files changed, 15 insertions, 6 deletions
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 20ac403469a0..c55a761c22bb 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -20,10 +20,8 @@
#include "delegation.h"
#include "internal.h"
-static void nfs_free_delegation(struct nfs_delegation *delegation)
+static void nfs_do_free_delegation(struct nfs_delegation *delegation)
{
- if (delegation->cred)
- put_rpccred(delegation->cred);
kfree(delegation);
}
@@ -31,7 +29,18 @@ static void nfs_free_delegation_callback(struct rcu_head *head)
{
struct nfs_delegation *delegation = container_of(head, struct nfs_delegation, rcu);
- nfs_free_delegation(delegation);
+ nfs_do_free_delegation(delegation);
+}
+
+static void nfs_free_delegation(struct nfs_delegation *delegation)
+{
+ struct rpc_cred *cred;
+
+ cred = rcu_dereference(delegation->cred);
+ rcu_assign_pointer(delegation->cred, NULL);
+ call_rcu(&delegation->rcu, nfs_free_delegation_callback);
+ if (cred)
+ put_rpccred(cred);
}
static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state)
@@ -166,7 +175,7 @@ static int nfs_do_return_delegation(struct inode *inode, struct nfs_delegation *
int res = 0;
res = nfs4_proc_delegreturn(inode, delegation->cred, &delegation->stateid);
- call_rcu(&delegation->rcu, nfs_free_delegation_callback);
+ nfs_free_delegation(delegation);
return res;
}
@@ -448,7 +457,7 @@ restart:
spin_unlock(&clp->cl_lock);
rcu_read_unlock();
if (delegation != NULL)
- call_rcu(&delegation->rcu, nfs_free_delegation_callback);
+ nfs_free_delegation(delegation);
goto restart;
}
rcu_read_unlock();