1 files changed, 17 insertions, 9 deletions

diff --git a/mm/filemap.c b/mm/filemap.c
index 54e968650855..494ff20b6cfa 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1100,8 +1100,9 @@ page_ok:
 
 page_not_up_to_date:
                 /* Get exclusive access to the page ... */
-                if (lock_page_killable(page))
-                        goto readpage_eio;
+                error = lock_page_killable(page);
+                if (unlikely(error))
+                        goto readpage_error;
 
 page_not_up_to_date_locked:
                 /* Did it get truncated before we got the lock? */
@@ -1130,8 +1131,9 @@ readpage:
                 }
 
                 if (!PageUptodate(page)) {
-                        if (lock_page_killable(page))
-                                goto readpage_eio;
+                        error = lock_page_killable(page);
+                        if (unlikely(error))
+                                goto readpage_error;
                         if (!PageUptodate(page)) {
                                 if (page->mapping == NULL) {
                                         /*
@@ -1143,15 +1145,14 @@ readpage:
                                 }
                                 unlock_page(page);
                                 shrink_readahead_size_eio(filp, ra);
-                                goto readpage_eio;
+                                error = -EIO;
+                                goto readpage_error;
                         }
                         unlock_page(page);
                 }
 
                 goto page_ok;
 
-readpage_eio:
-                error = -EIO;
 readpage_error:
                 /* UHHUH! A synchronous read error occurred. Report it */
                 desc->error = error;
@@ -2129,13 +2130,20 @@ generic_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
          * After a write we want buffered reads to be sure to go to disk to get
          * the new data.  We invalidate clean cached page from the region we're
          * about to write.  We do this *before* the write so that we can return
-         * -EIO without clobbering -EIOCBQUEUED from ->direct_IO().
+         * without clobbering -EIOCBQUEUED from ->direct_IO().
          */
         if (mapping->nrpages) {
                 written = invalidate_inode_pages2_range(mapping,
                                         pos >> PAGE_CACHE_SHIFT, end);
-                if (written)
+                /*
+                 * If a page can not be invalidated, return 0 to fall back
+                 * to buffered write.
+                 */
+                if (written) {
+                        if (written == -EBUSY)
+                                return 0;
                         goto out;
+                }
         }
 
         written = mapping->a_ops->direct_IO(WRITE, iocb, iov, pos, *nr_segs);