diff options
| -rw-r--r-- | fs/cifs/file.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 0f05cab5d24..8a49b2e77d3 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1245,14 +1245,21 @@ retry: wait_on_page_writeback(page); if (PageWriteback(page) || - !test_clear_page_dirty(page)) { + !clear_page_dirty_for_io(page)) { unlock_page(page); break; } + /* + * This actually clears the dirty bit in the radix tree. + * See cifs_writepage() for more commentary. + */ + set_page_writeback(page); + if (page_offset(page) >= mapping->host->i_size) { done = 1; unlock_page(page); + end_page_writeback(page); break; } @@ -1316,6 +1323,7 @@ retry: SetPageError(page); kunmap(page); unlock_page(page); + end_page_writeback(page); page_cache_release(page); } if ((wbc->nr_to_write -= n_iov) <= 0) @@ -1352,11 +1360,23 @@ static int cifs_writepage(struct page* page, struct writeback_control *wbc) if (!PageUptodate(page)) { cFYI(1, ("ppw - page not up to date")); } - + + /* + * Set the "writeback" flag, and clear "dirty" in the radix tree. + * + * A writepage() implementation always needs to do either this, + * or re-dirty the page with "redirty_page_for_writepage()" in + * the case of a failure. + * + * Just unlocking the page will cause the radix tree tag-bits + * to fail to update with the state of the page correctly. + */ + set_page_writeback(page); rc = cifs_partialpagewrite(page, 0, PAGE_CACHE_SIZE); SetPageUptodate(page); /* BB add check for error and Clearuptodate? */ unlock_page(page); - page_cache_release(page); + end_page_writeback(page); + page_cache_release(page); FreeXid(xid); return rc; } |