NFS: Clean up nfs_scan_dirty()

[powerpc.git] / fs / nfs / inode.c

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index bc9376c..08cc4c5 100644 (file)
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -131,6 +131,15 @@ void nfs_zap_caches(struct inode *inode)
        spin_unlock(&inode->i_lock);
 }
 
+void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
+{
+       if (mapping->nrpages != 0) {
+               spin_lock(&inode->i_lock);
+               NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
+               spin_unlock(&inode->i_lock);
+       }
+}
+
 static void nfs_zap_acl_cache(struct inode *inode)
 {
        void (*clear_acl_cache)(struct inode *);
@@ -574,7 +583,7 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
 
        nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
        lock_kernel();
-       if (!inode || is_bad_inode(inode))
+       if (is_bad_inode(inode))
                goto out_nowait;
        if (NFS_STALE(inode))
                goto out_nowait;
@@ -671,13 +680,20 @@ int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
        if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
                        || nfs_attribute_timeout(inode))
                ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
+       if (ret < 0)
+               goto out;
 
        if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
-               nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
-               if (S_ISREG(inode->i_mode))
-                       nfs_sync_mapping(mapping);
-               invalidate_inode_pages2(mapping);
-
+               if (mapping->nrpages != 0) {
+                       if (S_ISREG(inode->i_mode)) {
+                               ret = nfs_sync_mapping(mapping);
+                               if (ret < 0)
+                                       goto out;
+                       }
+                       ret = invalidate_inode_pages2(mapping);
+                       if (ret < 0)
+                               goto out;
+               }
                spin_lock(&inode->i_lock);
                nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
                if (S_ISDIR(inode->i_mode)) {
@@ -687,10 +703,12 @@ int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
                }
                spin_unlock(&inode->i_lock);
 
+               nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
                dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
                                inode->i_sb->s_id,
                                (long long)NFS_FILEID(inode));
        }
+out:
        return ret;
 }