From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752120AbdFLDEy (ORCPT ); Sun, 11 Jun 2017 23:04:54 -0400 Received: from mail.kernel.org ([198.145.29.99]:39176 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752002AbdFLDEw (ORCPT ); Sun, 11 Jun 2017 23:04:52 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0D9D1219A8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=jaegeuk@kernel.org From: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Jaegeuk Kim Subject: [PATCH] f2fs: fix ref of discard command Date: Sun, 11 Jun 2017 20:04:49 -0700 Message-Id: <20170612030449.79290-1-jaegeuk@kernel.org> X-Mailer: git-send-email 2.13.0.rc1.294.g07d810a77f-goog Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch resolves kernel panic for xfstests/081, caused by recent f2fs_bug_on f2fs: add f2fs_bug_on in __remove_discard_cmd Signed-off-by: Jaegeuk Kim --- fs/f2fs/segment.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 86a0c1095939..a6d77388a806 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -1025,6 +1025,8 @@ static void __wait_discard_cmd(struct f2fs_sb_info *sbi, bool wait_cond) list_for_each_entry_safe(dc, tmp, wait_list, list) { if (!wait_cond || (dc->state == D_DONE && !dc->ref)) { wait_for_completion_io(&dc->wait); + if (dc->state == D_DONE && dc->ref) + dc->ref--; __remove_discard_cmd(sbi, dc); } else { dc->ref++; -- 2.13.0.rc1.294.g07d810a77f-goog