From patchwork Tue Aug 17 09:14:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 12441105 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 54028C4320A for ; Tue, 17 Aug 2021 09:17:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3F6B760720 for ; Tue, 17 Aug 2021 09:17:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239591AbhHQJSL (ORCPT ); Tue, 17 Aug 2021 05:18:11 -0400 Received: from smtp-out2.suse.de ([195.135.220.29]:47562 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239510AbhHQJRV (ORCPT ); Tue, 17 Aug 2021 05:17:21 -0400 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id CFE002002E; Tue, 17 Aug 2021 09:16:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1629191802; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=uae3GyC9S0tiwabHNIIUKEiBquUo/4QHcQA7ZuHbp8w=; b=dmV41zB2ZOtGLGWhjc17cINTOexLIkUmpgyP0ltWVWhvrIk92HeJGLQDktcQiyrhqfTfyJ OYny1DS4tJNEzA0KUXydcvcYcPIIy2t/O/yzRBs1TegVWiEA9TDmt9D8GQc7Kl5IdrAkU1 cwCV6NMNP2eFqo7xrr9zd/bd2sCx62g= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1629191802; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=uae3GyC9S0tiwabHNIIUKEiBquUo/4QHcQA7ZuHbp8w=; b=4kzY2GAVt3pgVs2BlekzQKSAT8Q3rdzOV+XXBdy+nW4Mm8gYY+dTgb9TBKUG3c2OT2Hx8v tKkeDvU3t/KKM0AA== Received: from adalid.arch.suse.de (adalid.arch.suse.de [10.161.8.13]) by relay2.suse.de (Postfix) with ESMTP id CA2F6A3BBD; Tue, 17 Aug 2021 09:16:42 +0000 (UTC) Received: by adalid.arch.suse.de (Postfix, from userid 16045) id C778F518CEBD; Tue, 17 Aug 2021 11:16:42 +0200 (CEST) From: Hannes Reinecke To: "Martin K. Petersen" Cc: Christoph Hellwig , James Bottomley , linux-scsi@vger.kernel.org, Hannes Reinecke , Hannes Reinecke Subject: [PATCH 47/51] snic: use dedicated device reset command Date: Tue, 17 Aug 2021 11:14:52 +0200 Message-Id: <20210817091456.73342-48-hare@suse.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210817091456.73342-1-hare@suse.de> References: <20210817091456.73342-1-hare@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Use a dedicated command to send a device reset instead of relying on using the command which triggered the device failure. Signed-off-by: Hannes Reinecke --- drivers/scsi/snic/snic_scsi.c | 52 ++++++++++++++++------------------- 1 file changed, 24 insertions(+), 28 deletions(-) diff --git a/drivers/scsi/snic/snic_scsi.c b/drivers/scsi/snic/snic_scsi.c index e87f61d42586..26fbc0141b51 100644 --- a/drivers/scsi/snic/snic_scsi.c +++ b/drivers/scsi/snic/snic_scsi.c @@ -2131,57 +2131,53 @@ snic_unlink_and_release_req(struct snic *snic, struct scsi_cmnd *sc, int flag) int snic_device_reset(struct scsi_cmnd *sc) { - struct Scsi_Host *shost = sc->device->host; + struct scsi_device *sdev = sc->device; + struct Scsi_Host *shost = sdev->host; struct snic *snic = shost_priv(shost); struct snic_req_info *rqi = NULL; - int tag = snic_cmd_tag(sc); int start_time = jiffies; int ret = FAILED; int dr_supp = 0; - SNIC_SCSI_DBG(shost, "dev_reset:sc %p :0x%x :req = %p :tag = %d\n", - sc, sc->cmnd[0], sc->request, - snic_cmd_tag(sc)); - dr_supp = snic_dev_reset_supported(sc->device); + SNIC_SCSI_DBG(shost, "dev_reset\n"); + dr_supp = snic_dev_reset_supported(sdev); if (!dr_supp) { /* device reset op is not supported */ SNIC_HOST_INFO(shost, "LUN Reset Op not supported.\n"); - snic_unlink_and_release_req(snic, sc, SNIC_DEV_RST_NOTSUP); - goto dev_rst_end; } if (unlikely(snic_get_state(snic) != SNIC_ONLINE)) { - snic_unlink_and_release_req(snic, sc, 0); SNIC_HOST_ERR(shost, "Devrst: Parent Devs are not online.\n"); goto dev_rst_end; } - /* There is no tag when lun reset is issue through ioctl. */ - if (unlikely(tag <= SNIC_NO_TAG)) { - SNIC_HOST_INFO(snic->shost, - "Devrst: LUN Reset Recvd thru IOCTL.\n"); - - rqi = snic_req_init(snic, 0); - if (!rqi) - goto dev_rst_end; - - memset(scsi_cmd_priv(sc), 0, - sizeof(struct snic_internal_io_state)); - CMD_SP(sc) = (char *)rqi; - CMD_FLAGS(sc) = SNIC_NO_FLAGS; + rqi = snic_req_init(snic, 0); + if (!rqi) + goto dev_rst_end; - /* Add special tag for dr coming from user spc */ - rqi->tm_tag = SNIC_TAG_IOCTL_DEV_RST; - rqi->sc = sc; + /* The last tag is reserved for device reset */ + sc = scsi_host_find_tag(snic->shost, snic->tmf_tag_id); + if (!sc || CMD_SP(sc)) { + SNIC_HOST_ERR(snic->shost, + "Devrst: TMF busy\n"); + goto dev_rst_end; } + memset(scsi_cmd_priv(sc), 0, + sizeof(struct snic_internal_io_state)); + CMD_SP(sc) = (char *)rqi; + CMD_FLAGS(sc) = SNIC_NO_FLAGS; + + /* Add special tag for dr coming from user spc */ + rqi->tm_tag = SNIC_TAG_IOCTL_DEV_RST; + rqi->sc = sc; ret = snic_send_dr_and_wait(snic, sc); if (ret) { SNIC_HOST_ERR(snic->shost, "Devrst: IO w/ Tag %x Failed w/ err = %d\n", - tag, ret); + snic_cmd_tag(sc), ret); snic_unlink_and_release_req(snic, sc, 0); @@ -2191,7 +2187,7 @@ snic_device_reset(struct scsi_cmnd *sc) ret = snic_dr_finish(snic, sc); dev_rst_end: - SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, + SNIC_TRC(snic->shost->host_no, snic_cmd_tag(sc), (ulong) sc, jiffies_to_msecs(jiffies - start_time), 0, SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc)); @@ -2342,7 +2338,7 @@ snic_host_reset(struct Scsi_Host *shost) schedule_timeout(msecs_to_jiffies(1)); sc = scsi_host_find_tag(shost, snic->tmf_tag_id); - if (!sc) { + if (!sc || CMD_SP(sc)) { SNIC_HOST_ERR(shost, "reset:Host Reset Failed to allocate sc.\n"); spin_lock_irqsave(&snic->snic_lock, flags);