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-rw-r--r--mm/filemap.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 870971e20967..db250d0e0565 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2926,9 +2926,15 @@ generic_file_direct_write(struct kiocb *iocb, struct iov_iter *from)
* we're writing. Either one is a pretty crazy thing to do,
* so we don't support it 100%. If this invalidation
* fails, tough, the write still worked...
+ *
+ * Most of the time we do not need this since dio_complete() will do
+ * the invalidation for us. However there are some file systems that
+ * do not end up with dio_complete() being called, so let's not break
+ * them by removing it completely
*/
- invalidate_inode_pages2_range(mapping,
- pos >> PAGE_SHIFT, end);
+ if (mapping->nrpages)
+ invalidate_inode_pages2_range(mapping,
+ pos >> PAGE_SHIFT, end);
if (written > 0) {
pos += written;