From patchwork Tue Mar 27 19:05:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Douglas Gilbert X-Patchwork-Id: 10311515 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A5715600F6 for ; Tue, 27 Mar 2018 19:05:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 97762288DA for ; Tue, 27 Mar 2018 19:05:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8C58129C91; Tue, 27 Mar 2018 19:05:51 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 414CF288DA for ; Tue, 27 Mar 2018 19:05:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751143AbeC0TFu (ORCPT ); Tue, 27 Mar 2018 15:05:50 -0400 Received: from smtp.infotech.no ([82.134.31.41]:44525 "EHLO smtp.infotech.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750966AbeC0TFs (ORCPT ); Tue, 27 Mar 2018 15:05:48 -0400 Received: from localhost (localhost [127.0.0.1]) by smtp.infotech.no (Postfix) with ESMTP id 4E3DA2041AF; Tue, 27 Mar 2018 21:05:47 +0200 (CEST) X-Virus-Scanned: by amavisd-new-2.6.6 (20110518) (Debian) at infotech.no Received: from smtp.infotech.no ([127.0.0.1]) by localhost (smtp.infotech.no [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id f4NzOcpKfIYf; Tue, 27 Mar 2018 21:05:47 +0200 (CEST) Received: from xtwo70.bingwo.ca (host-184-164-15-239.dyn.295.ca [184.164.15.239]) by smtp.infotech.no (Postfix) with ESMTPA id 169A7204154; Tue, 27 Mar 2018 21:05:45 +0200 (CEST) From: Douglas Gilbert To: linux-scsi@vger.kernel.org Cc: martin.petersen@oracle.com, jejb@linux.vnet.ibm.com, hare@suse.de, bart.vanassche@wdc.com, jthumshirn@suse.de Subject: [PATCH v3 7/7] scsi_io_completion convert BUGs to WARNs Date: Tue, 27 Mar 2018 15:05:34 -0400 Message-Id: <20180327190534.10449-8-dgilbert@interlog.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180327190534.10449-1-dgilbert@interlog.com> References: <20180327190534.10449-1-dgilbert@interlog.com> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The scsi_io_completion function contains three BUG() and BUG_ON() calls. Replace them with WARN variants. Signed-off-by: Douglas Gilbert --- drivers/scsi/scsi_lib.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 391bbb0b19b8..6fa24cff43a6 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1046,13 +1046,21 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) scsi_req(req->next_rq)->resid_len = scsi_in(cmd)->resid; if (scsi_end_request(req, BLK_STS_OK, blk_rq_bytes(req), blk_rq_bytes(req->next_rq))) - BUG(); + WARN_ONCE(true, + "Bidi command with remaining bytes"); return; } } /* no bidi support yet, other than in pass-through */ - BUG_ON(blk_bidi_rq(req)); + if (unlikely(blk_bidi_rq(req))) { + WARN_ONCE(true, "Only support bidi command in passthrough"); + scmd_printk(KERN_ERR, cmd, "Killing bidi command\n"); + if (scsi_end_request(req, BLK_STS_IOERR, blk_rq_bytes(req), + blk_rq_bytes(req->next_rq))) + WARN_ONCE(true, "Bidi command with remaining bytes"); + return; + } /* * Next deal with any sectors which we were able to correctly @@ -1075,7 +1083,8 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) /* Kill remainder if no retries */ if (unlikely(blk_stat && scsi_noretry_cmd(cmd))) { if (scsi_end_request(req, blk_stat, blk_rq_bytes(req), 0)) - BUG(); + WARN_ONCE(true, + "Bytes remaining after failed, no-retry command"); return; }