diff options
| -rw-r--r-- | fs/9p/vfs_addr.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 6181ad79e1a5..ff8ece89fb99 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -309,18 +309,10 @@ 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. @@ -330,6 +322,7 @@ 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); |