From patchwork Tue Sep 29 07:38:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Wagner X-Patchwork-Id: 11805083 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B986F139A for ; Tue, 29 Sep 2020 07:38:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ABA242083B for ; Tue, 29 Sep 2020 07:38:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726521AbgI2HiP (ORCPT ); Tue, 29 Sep 2020 03:38:15 -0400 Received: from mx2.suse.de ([195.135.220.15]:36298 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725320AbgI2HiP (ORCPT ); Tue, 29 Sep 2020 03:38:15 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 6B5F3AC4D; Tue, 29 Sep 2020 07:38:13 +0000 (UTC) From: Daniel Wagner To: Nilesh Javali , Arun Easi Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Daniel Wagner Subject: [PATCH] qla2xxx: Do not consume srb greedily Date: Tue, 29 Sep 2020 09:38:02 +0200 Message-Id: <20200929073802.18770-1-dwagner@suse.de> X-Mailer: git-send-email 2.16.4 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org qla2xx_process_get_sp_from_handle() will clear the slot which the current srb is stored. So this function has a side effect. Therefore, we can't use it in qla24xx_process_mbx_iocb_response() to check for consistency and later again in qla24xx_mbx_iocb_entry(). Let's move the consistency check directly into qla24xx_mbx_iocb_entry() and avoid the double call or any open coding of the qla2xx_process_get_sp_from_handle() functionality. Fixes: 31a3271ff11b ("scsi: qla2xxx: Handle incorrect entry_type entries") Signed-off-by: Daniel Wagner Reviewed-by: Himanshu Madhani Reviewed-by: Arun Easi --- Hi, Brown bag for me please. My test patch had an open coded version of qla2xx_process_get_sp_from_handle() which didn't consume the srb. When I prepared it for sending it out, I 'cleaned' it up by using qla2xx_process_get_sp_from_handle() twice. Sorry, Daniel drivers/scsi/qla2xxx/qla_isr.c | 42 +++++++++++++++--------------------------- 1 file changed, 15 insertions(+), 27 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c index 96811354f78a..2baba87c4e0c 100644 --- a/drivers/scsi/qla2xxx/qla_isr.c +++ b/drivers/scsi/qla2xxx/qla_isr.c @@ -1839,6 +1839,7 @@ qla24xx_mbx_iocb_entry(scsi_qla_host_t *vha, struct req_que *req, struct mbx_24xx_entry *pkt) { const char func[] = "MBX-IOCB2"; + struct qla_hw_data *ha = vha->hw; srb_t *sp; struct srb_iocb *si; u16 sz, i; @@ -1848,6 +1849,18 @@ qla24xx_mbx_iocb_entry(scsi_qla_host_t *vha, struct req_que *req, if (!sp) return; + if (sp->type == SRB_SCSI_CMD || + sp->type == SRB_NVME_CMD || + sp->type == SRB_TM_CMD) { + ql_log(ql_log_warn, vha, 0x509d, + "Inconsistent event entry type %d\n", sp->type); + if (IS_P3P_TYPE(ha)) + set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags); + else + set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); + return; + } + si = &sp->u.iocb_cmd; sz = min(ARRAY_SIZE(pkt->mb), ARRAY_SIZE(sp->u.iocb_cmd.u.mbx.in_mb)); @@ -3406,32 +3419,6 @@ void qla24xx_nvme_ls4_iocb(struct scsi_qla_host *vha, sp->done(sp, comp_status); } -static void qla24xx_process_mbx_iocb_response(struct scsi_qla_host *vha, - struct rsp_que *rsp, struct sts_entry_24xx *pkt) -{ - struct qla_hw_data *ha = vha->hw; - srb_t *sp; - static const char func[] = "MBX-IOCB2"; - - sp = qla2x00_get_sp_from_handle(vha, func, rsp->req, pkt); - if (!sp) - return; - - if (sp->type == SRB_SCSI_CMD || - sp->type == SRB_NVME_CMD || - sp->type == SRB_TM_CMD) { - ql_log(ql_log_warn, vha, 0x509d, - "Inconsistent event entry type %d\n", sp->type); - if (IS_P3P_TYPE(ha)) - set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags); - else - set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); - return; - } - - qla24xx_mbx_iocb_entry(vha, rsp->req, (struct mbx_24xx_entry *)pkt); -} - /** * qla24xx_process_response_queue() - Process response queue entries. * @vha: SCSI driver HA context @@ -3539,7 +3526,8 @@ void qla24xx_process_response_queue(struct scsi_qla_host *vha, (struct abort_entry_24xx *)pkt); break; case MBX_IOCB_TYPE: - qla24xx_process_mbx_iocb_response(vha, rsp, pkt); + qla24xx_mbx_iocb_entry(vha, rsp->req, + (struct mbx_24xx_entry *)pkt); break; case VP_CTRL_IOCB_TYPE: qla_ctrlvp_completed(vha, rsp->req,