NFS: Fix another O_DIRECT race
Ensure we call unmap_mapping_range() and sync dirty pages to disk before
doing an NFS direct write.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index b497c71..0792288 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -678,15 +678,9 @@
if (!count)
goto out;
- if (mapping->nrpages) {
- retval = filemap_fdatawrite(mapping);
- if (retval == 0)
- retval = nfs_wb_all(inode);
- if (retval == 0)
- retval = filemap_fdatawait(mapping);
- if (retval)
- goto out;
- }
+ retval = nfs_sync_mapping(mapping);
+ if (retval)
+ goto out;
retval = nfs_direct_read(inode, ctx, &iov, pos, 1);
if (retval > 0)
@@ -764,15 +758,9 @@
if (!count)
goto out;
- if (mapping->nrpages) {
- retval = filemap_fdatawrite(mapping);
- if (retval == 0)
- retval = nfs_wb_all(inode);
- if (retval == 0)
- retval = filemap_fdatawait(mapping);
- if (retval)
- goto out;
- }
+ retval = nfs_sync_mapping(mapping);
+ if (retval)
+ goto out;
retval = nfs_direct_write(inode, ctx, &iov, pos, 1);
if (mapping->nrpages)