nfs: tear down caches in nfs_init_writepagecache when allocation fails

commit 3dd4765fce04c0b4af1e0bc4c0b10f906f95fabc upstream.

...and ensure that we tear down the nfs_commit_data cache too when
unloading the module.

Cc: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
[bwh: Backported to 3.2: drop the nfs_cdata_cachep cleanup; it doesn't exist]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index c6e523a..301391a 100644 (file)
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1742,12 +1742,12 @@ int __init nfs_init_writepagecache(void)
        nfs_wdata_mempool = mempool_create_slab_pool(MIN_POOL_WRITE,
                                                     nfs_wdata_cachep);
        if (nfs_wdata_mempool == NULL)
-               return -ENOMEM;
+               goto out_destroy_write_cache;
 
        nfs_commit_mempool = mempool_create_slab_pool(MIN_POOL_COMMIT,
                                                      nfs_wdata_cachep);
        if (nfs_commit_mempool == NULL)
-               return -ENOMEM;
+               goto out_destroy_write_mempool;
 
        /*
         * NFS congestion size, scale with available memory.
@@ -1770,6 +1770,12 @@ int __init nfs_init_writepagecache(void)
                nfs_congestion_kb = 256*1024;
 
        return 0;
+
+out_destroy_write_mempool:
+       mempool_destroy(nfs_wdata_mempool);
+out_destroy_write_cache:
+       kmem_cache_destroy(nfs_wdata_cachep);
+       return -ENOMEM;
 }
 
 void nfs_destroy_writepagecache(void)