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=-10.5 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 5A541C47423 for ; Tue, 29 Sep 2020 11:12:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1AB562158C for ; Tue, 29 Sep 2020 11:12:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601377969; bh=jsNYaKVgFHpLC/ktuWsKIVg7iwR9LxHLmxcBHAgJsHI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=mq/bPDQCWcgLYyedzPq4kNW0M0uYJ9lhfYbopETkSdVOHdmpkswljkb/8FEYXUWP2 bTei7gBYNz2aAqaknOPPCxL0tbn3fmTmwcLuxt+tHyse0F2PzUcy5n6kIXbRJHwb5L G9aBBdpd0HOBhv+JU21izjsE9PL86Fr4aQd4sKgg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729117AbgI2LMr (ORCPT ); Tue, 29 Sep 2020 07:12:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:54136 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728712AbgI2LMX (ORCPT ); Tue, 29 Sep 2020 07:12:23 -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 6BFFD21924; Tue, 29 Sep 2020 11:12:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601377943; bh=jsNYaKVgFHpLC/ktuWsKIVg7iwR9LxHLmxcBHAgJsHI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=p1EbL+J/xOGZNZaTjf/INP6fzzt+Th8AASJXGgxSRAuuk1CKQFsdJhjLULoSYaCsu +u0sQtouuW4qtG70zZqnt1sq3bLACq4CwAvcP3PXJ/D+y38+mlGS/yEhf61lzFRAsj 8aK4g4C34Ft08ei6rQLnREhqn2hybAoO9WSA0+5s= 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 4.9 121/121] ata: sata_mv, avoid trigerrable BUG_ON Date: Tue, 29 Sep 2020 13:01:05 +0200 Message-Id: <20200929105936.175135632@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200929105930.172747117@linuxfoundation.org> References: <20200929105930.172747117@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-ide@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 @@ -2111,12 +2111,10 @@ 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);