From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB88EC2D0EC for ; Fri, 10 Apr 2020 03:50:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8B50B20BED for ; Fri, 10 Apr 2020 03:50:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586490659; bh=IrjETOVg0CsI3Oifk08UPiZ54HyekBJSt5pMNZD3T4A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EYrfVev/RJFW/RsIDo2xkUL835J/ETMKuWB+KfgP6BaEHoj/RPj2nRvg6oG7iZ2tE zqloNKQNUfEoBwR8cwsQzbn+oiV9a5vYfnIzhE6oLzgPkadWHcoCc5B/MBeD0B1SQp MAT2o6MqIHFirEndJEJO/yTNVDkfKI7RZd7DB0HM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729033AbgDJDu6 (ORCPT ); Thu, 9 Apr 2020 23:50:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:35606 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728327AbgDJDus (ORCPT ); Thu, 9 Apr 2020 23:50:48 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1B52F2137B; Fri, 10 Apr 2020 03:50:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586490648; bh=IrjETOVg0CsI3Oifk08UPiZ54HyekBJSt5pMNZD3T4A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PT/Bb9Ni8u91GpWm1Q1bm119l/sVhguRxApF8DgnsVGaxx40nt5krfk7vuxyByFxF 7L+5IrSvUDvrvBXzwUtIAFCQMd2e76k+HA/zoqK0pDOS+Sy/MfHcHHE4IeopNJ7wzr K6zeGWLjDIN67rYyaqk+0kRbnsDk1etKXQ1kYU8o= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alexey Dobriyan , Christoph Hellwig , Jens Axboe , Sasha Levin , linux-block@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 03/22] null_blk: fix spurious IO errors after failed past-wp access Date: Thu, 9 Apr 2020 23:50:25 -0400 Message-Id: <20200410035044.9698-3-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200410035044.9698-1-sashal@kernel.org> References: <20200410035044.9698-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Alexey Dobriyan [ Upstream commit ff77042296d0a54535ddf74412c5ae92cb4ec76a ] Steps to reproduce: BLKRESETZONE zone 0 // force EIO pwrite(fd, buf, 4096, 4096); [issue more IO including zone ioctls] It will start failing randomly including IO to unrelated zones because of ->error "reuse". Trigger can be partition detection as well if test is not run immediately which is even more entertaining. The fix is of course to clear ->error where necessary. Reviewed-by: Christoph Hellwig Signed-off-by: Alexey Dobriyan (SK hynix) Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- drivers/block/null_blk.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index b4078901dbcb9..b12e373aa956a 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -622,6 +622,7 @@ static struct nullb_cmd *__alloc_cmd(struct nullb_queue *nq) if (tag != -1U) { cmd = &nq->cmds[tag]; cmd->tag = tag; + cmd->error = BLK_STS_OK; cmd->nq = nq; if (nq->dev->irqmode == NULL_IRQ_TIMER) { hrtimer_init(&cmd->timer, CLOCK_MONOTONIC, @@ -1399,6 +1400,7 @@ static blk_status_t null_queue_rq(struct blk_mq_hw_ctx *hctx, cmd->timer.function = null_cmd_timer_expired; } cmd->rq = bd->rq; + cmd->error = BLK_STS_OK; cmd->nq = nq; blk_mq_start_request(bd->rq); -- 2.20.1