hostfs: Handle page write errors correctly

If a page can't be written back, we need to call mapping_set_error(),
not clear the page's Uptodate flag.  Also remove the clearing of PageError
on success; that flag is used for read errors, not write errors.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index cc1bc6f..07881b7 100644 (file)
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -416,15 +416,15 @@ static int hostfs_writepage(struct page *page, struct writeback_control *wbc)
 
        err = write_file(HOSTFS_I(inode)->fd, &base, buffer, count);
        if (err != count) {
-               ClearPageUptodate(page);
+               if (err >= 0)
+                       err = -EIO;
+               mapping_set_error(mapping, err);
                goto out;
        }
 
        if (base > inode->i_size)
                inode->i_size = base;
 
-       if (PageError(page))
-               ClearPageError(page);
        err = 0;
 
  out: