From patchwork Tue Sep 29 11:00:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 262877 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=-10.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 873BDC47423 for ; Tue, 29 Sep 2020 12:46:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3677B208B8 for ; Tue, 29 Sep 2020 12:46:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601383609; bh=EcG2ckzn2pbbvAXVX0EIEq/xsPNY94hSN+BLHl++jmM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DAR/d4MjtB1zLJRWcxptR4jjv80jiSmmVOM2cwPY4M0jnko9f/ILIku0UNLeiAYU1 MaHepwozSxV0Ev4LJ7RQ7M5nvbsK7xGpSryMB2Nqu7Tmfu4YnBQQO0acaagDeJj4Ls sbMYs9l8AVtDdhJ5+IaSN0AsrjKV3oMLWGylGBMA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730222AbgI2Mqs (ORCPT ); Tue, 29 Sep 2020 08:46:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:43878 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725786AbgI2LG0 (ORCPT ); Tue, 29 Sep 2020 07:06:26 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C64D9221EC; Tue, 29 Sep 2020 11:06:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601377585; bh=EcG2ckzn2pbbvAXVX0EIEq/xsPNY94hSN+BLHl++jmM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Xq/J/SdBSjo/XTLtS3MKDnGRLVjvDITFYQzdcwt90P8eGxDlynB6c5MizYPdbftnK /hx5763IKfsc2EWxWOz4M9QF/ljHUI1J2Y0rXOb3QF9hnmtps12aL4s+p+UpxudpXM nI4MpYktYdQj6xrs/pC4wWgkwiLO/gwhXVGeIbwM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jiri Slaby , Jens Axboe , linux-ide@vger.kernel.org, Sergei Shtylyov Subject: [PATCH 4.4 85/85] ata: sata_mv, avoid trigerrable BUG_ON Date: Tue, 29 Sep 2020 13:00:52 +0200 Message-Id: <20200929105932.432590253@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200929105928.198942536@linuxfoundation.org> References: <20200929105928.198942536@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jiri Slaby commit e9f691d899188679746eeb96e6cb520459eda9b4 upstream. There are several reports that the BUG_ON on unsupported command in mv_qc_prep can be triggered under some circumstances: https://bugzilla.suse.com/show_bug.cgi?id=1110252 https://serverfault.com/questions/888897/raid-problems-after-power-outage https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1652185 https://bugs.centos.org/view.php?id=14998 Let sata_mv handle the failure gracefully: warn about that incl. the failed command number and return an AC_ERR_INVALID error. We can do that now thanks to the previous patch. Remove also the long-standing FIXME. [v2] use %.2x as commands are defined as hexa. Signed-off-by: Jiri Slaby Cc: Jens Axboe Cc: linux-ide@vger.kernel.org Cc: Sergei Shtylyov Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- drivers/ata/sata_mv.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -2113,12 +2113,10 @@ static enum ata_completion_errors mv_qc_ * non-NCQ mode are: [RW] STREAM DMA and W DMA FUA EXT, none * of which are defined/used by Linux. If we get here, this * driver needs work. - * - * FIXME: modify libata to give qc_prep a return value and - * return error here. */ - BUG_ON(tf->command); - break; + ata_port_err(ap, "%s: unsupported command: %.2x\n", __func__, + tf->command); + return AC_ERR_INVALID; } mv_crqb_pack_cmd(cw++, tf->nsect, ATA_REG_NSECT, 0); mv_crqb_pack_cmd(cw++, tf->hob_lbal, ATA_REG_LBAL, 0);