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-rw-r--r--fs/9p/vfs_addr.c15
1 files changed, 4 insertions, 11 deletions
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index 5ca1fb0043f6..adaf6f6dd858 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -310,18 +310,10 @@ static int v9fs_write_end(struct file *filp, struct address_space *mapping,
p9_debug(P9_DEBUG_VFS, "filp %p, mapping %p\n", filp, mapping);
- if (unlikely(copied < len)) {
- /*
- * zero out the rest of the area
- */
- unsigned from = pos & (PAGE_SIZE - 1);
-
- zero_user(page, from + copied, len - copied);
- flush_dcache_page(page);
+ if (unlikely(copied < len && !PageUptodate(page))) {
+ copied = 0;
+ goto out;
}
-
- if (!PageUptodate(page))
- SetPageUptodate(page);
/*
* No need to use i_size_read() here, the i_size
* cannot change under us because we hold the i_mutex.
@@ -331,6 +323,7 @@ static int v9fs_write_end(struct file *filp, struct address_space *mapping,
i_size_write(inode, last_pos);
}
set_page_dirty(page);
+out:
unlock_page(page);
put_page(page);