NFS: Clean up - Simplify reference counting in fs/nfs/direct.c

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 845e201..c47a46e 100644 (file)
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -486,10 +486,8 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
        }
        nfs_pageio_complete(&desc);
 
-       while (!list_empty(&failed)) {
-               nfs_release_request(req);
+       while (!list_empty(&failed))
                nfs_unlock_and_release_request(req);
-       }
 
        if (put_dreq(dreq))
                nfs_direct_write_complete(dreq, dreq->inode);
@@ -518,9 +516,9 @@ static void nfs_direct_commit_complete(struct nfs_commit_data *data)
                nfs_list_remove_request(req);
                if (dreq->flags == NFS_ODIRECT_RESCHED_WRITES) {
                        /* Note the rewrite will go through mds */
+                       kref_get(&req->wb_kref);
                        nfs_mark_request_commit(req, NULL, &cinfo);
-               } else
-                       nfs_release_request(req);
+               }
                nfs_unlock_and_release_request(req);
        }
 
@@ -657,13 +655,11 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_pageio_descriptor *d
                                break;
                        }
                        nfs_lock_request(req);
-                       kref_get(&req->wb_kref);
                        req->wb_index = pos >> PAGE_SHIFT;
                        req->wb_offset = pos & ~PAGE_MASK;
                        if (!nfs_pageio_add_request(desc, req)) {
                                result = desc->pg_error;
                                nfs_unlock_and_release_request(req);
-                               nfs_release_request(req);
                                break;
                        }
                        pgbase = 0;
@@ -734,10 +730,8 @@ static void nfs_direct_write_completion(struct nfs_pgio_header *hdr)
                switch (bit) {
                case NFS_IOHDR_NEED_RESCHED:
                case NFS_IOHDR_NEED_COMMIT:
+                       kref_get(&req->wb_kref);
                        nfs_mark_request_commit(req, hdr->lseg, &cinfo);
-                       break;
-               default:
-                       nfs_release_request(req);
                }
                nfs_unlock_and_release_request(req);
        }
@@ -755,7 +749,6 @@ static void nfs_write_sync_pgio_error(struct list_head *head)
        while (!list_empty(head)) {
                req = nfs_list_entry(head->next);
                nfs_list_remove_request(req);
-               nfs_release_request(req);
                nfs_unlock_and_release_request(req);
        }
 }