NFSv4.1: Clean up nfs41_sequence_done

Move the test for res->sr_slot == NULL out of the nfs41_sequence_free_slot
helper and into the main function for efficiency.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 493e9cc..42da6af 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -559,15 +559,10 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
 {
        struct nfs4_session *session;
        struct nfs4_slot_table *tbl;
+       struct nfs4_slot *slot = res->sr_slot;
        bool send_new_highest_used_slotid = false;
 
-       if (!res->sr_slot) {
-               /* just wake up the next guy waiting since
-                * we may have not consumed a slot after all */
-               dprintk("%s: No slot\n", __func__);
-               return;
-       }
-       tbl = res->sr_slot->table;
+       tbl = slot->table;
        session = tbl->session;
 
        spin_lock(&tbl->slot_tbl_lock);
@@ -577,11 +572,11 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
        if (tbl->highest_used_slotid > tbl->target_highest_slotid)
                send_new_highest_used_slotid = true;
 
-       if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
+       if (nfs41_wake_and_assign_slot(tbl, slot)) {
                send_new_highest_used_slotid = false;
                goto out_unlock;
        }
-       nfs4_free_slot(tbl, res->sr_slot);
+       nfs4_free_slot(tbl, slot);
 
        if (tbl->highest_used_slotid != NFS4_NO_SLOT)
                send_new_highest_used_slotid = false;
@@ -595,16 +590,17 @@ out_unlock:
 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
 {
        struct nfs4_session *session;
-       struct nfs4_slot *slot;
+       struct nfs4_slot *slot = res->sr_slot;
        struct nfs_client *clp;
        bool interrupted = false;
        int ret = 1;
 
+       if (slot == NULL)
+               goto out_noaction;
        /* don't increment the sequence number if the task wasn't sent */
        if (!RPC_WAS_SENT(task))
                goto out;
 
-       slot = res->sr_slot;
        session = slot->table->session;
 
        if (slot->interrupted) {
@@ -679,6 +675,7 @@ out:
        /* The session may be reset by one of the error handlers. */
        dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
        nfs41_sequence_free_slot(res);
+out_noaction:
        return ret;
 retry_nowait:
        if (rpc_restart_call_prepare(task)) {