From patchwork Mon May 4 12:42:15 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 6326261 Return-Path: X-Original-To: patchwork-linux-scsi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 92C279F373 for ; Mon, 4 May 2015 12:44:56 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9A7C020377 for ; Mon, 4 May 2015 12:44:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 89B4E202A1 for ; Mon, 4 May 2015 12:44:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753352AbbEDMnS (ORCPT ); Mon, 4 May 2015 08:43:18 -0400 Received: from cantor2.suse.de ([195.135.220.15]:47360 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753344AbbEDMmk (ORCPT ); Mon, 4 May 2015 08:42:40 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 6172AAD4C; Mon, 4 May 2015 12:42:27 +0000 (UTC) From: Hannes Reinecke To: James Bottomley Cc: Christoph Hellwig , linux-scsi@vger.kernel.org, Hannes Reinecke Subject: [PATCH 09/17] scsi_dh_alua: switch to scsi_execute() Date: Mon, 4 May 2015 14:42:15 +0200 Message-Id: <1430743343-47174-10-git-send-email-hare@suse.de> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1430743343-47174-1-git-send-email-hare@suse.de> References: <1430743343-47174-1-git-send-email-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP All commands are issued synchronously, so no need to open-code scsi_execute anymore. Signed-off-by: Hannes Reinecke --- drivers/scsi/device_handler/scsi_dh_alua.c | 119 +++++++---------------------- 1 file changed, 26 insertions(+), 93 deletions(-) diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index 0b8e111..0cc18e3 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -103,80 +103,29 @@ static int realloc_buffer(struct alua_dh_data *h, unsigned len) return 0; } -static struct request *get_alua_req(struct scsi_device *sdev, - void *buffer, unsigned buflen, int rw) -{ - struct request *rq; - struct request_queue *q = sdev->request_queue; - - rq = blk_get_request(q, rw, GFP_NOIO); - - if (IS_ERR(rq)) { - sdev_printk(KERN_INFO, sdev, - "%s: blk_get_request failed\n", __func__); - return NULL; - } - blk_rq_set_block_pc(rq); - - if (buflen && blk_rq_map_kern(q, rq, buffer, buflen, GFP_NOIO)) { - blk_put_request(rq); - sdev_printk(KERN_INFO, sdev, - "%s: blk_rq_map_kern failed\n", __func__); - return NULL; - } - - rq->cmd_flags |= REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | - REQ_FAILFAST_DRIVER; - rq->retries = ALUA_FAILOVER_RETRIES; - rq->timeout = ALUA_FAILOVER_TIMEOUT * HZ; - - return rq; -} - /* * submit_rtpg - Issue a REPORT TARGET GROUP STATES command * @sdev: sdev the command should be sent to */ -static unsigned submit_rtpg(struct scsi_device *sdev, unsigned char *buff, +static int submit_rtpg(struct scsi_device *sdev, unsigned char *buff, int bufflen, unsigned char *sense, int flags) { - struct request *rq; - int err; - - rq = get_alua_req(sdev, buff, bufflen, READ); - if (!rq) { - err = DRIVER_BUSY << 24; - goto done; - } + u8 cdb[16]; + int req_flags = REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | + REQ_FAILFAST_DRIVER; /* Prepare the command. */ - rq->cmd[0] = MAINTENANCE_IN; + memset(cdb, 0x0, 16); + cdb[0] = MAINTENANCE_IN; if (!(flags & ALUA_RTPG_EXT_HDR_UNSUPP)) - rq->cmd[1] = MI_REPORT_TARGET_PGS | MI_EXT_HDR_PARAM_FMT; + cdb[1] = MI_REPORT_TARGET_PGS | MI_EXT_HDR_PARAM_FMT; else - rq->cmd[1] = MI_REPORT_TARGET_PGS; - rq->cmd[6] = (bufflen >> 24) & 0xff; - rq->cmd[7] = (bufflen >> 16) & 0xff; - rq->cmd[8] = (bufflen >> 8) & 0xff; - rq->cmd[9] = bufflen & 0xff; - rq->cmd_len = COMMAND_SIZE(MAINTENANCE_IN); - - rq->sense = sense; - memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); - rq->sense_len = 0; - - err = blk_execute_rq(rq->q, NULL, rq, 1); - if (err < 0) { - if (!rq->errors) - err = DID_ERROR << 16; - else - err = rq->errors; - if (rq->sense_len) - err |= (DRIVER_SENSE << 24); - } - blk_put_request(rq); -done: - return err; + cdb[1] = MI_REPORT_TARGET_PGS; + put_unaligned_be32(bufflen, &cdb[6]); + + return scsi_execute(sdev, cdb, DMA_FROM_DEVICE, buff, bufflen, + sense, ALUA_FAILOVER_TIMEOUT * HZ, + ALUA_FAILOVER_RETRIES, req_flags, NULL); } /* @@ -186,45 +135,29 @@ done: * to 'active/optimized' and let the array firmware figure out * the states of the remaining groups. */ -static unsigned submit_stpg(struct scsi_device *sdev, int group_id, - unsigned char *sense) +static int submit_stpg(struct scsi_device *sdev, int group_id, + unsigned char *sense) { - struct request *rq; + u8 cdb[COMMAND_SIZE(MAINTENANCE_OUT)]; unsigned char stpg_data[8]; int stpg_len = 8; - int err; + int req_flags = REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | + REQ_FAILFAST_DRIVER; /* Prepare the data buffer */ memset(stpg_data, 0, stpg_len); stpg_data[4] = TPGS_STATE_OPTIMIZED & 0x0f; put_unaligned_be16(group_id, &stpg_data[6]); - rq = get_alua_req(sdev, stpg_data, stpg_len, WRITE); - if (!rq) - return SCSI_DH_RES_TEMP_UNAVAIL; - /* Prepare the command. */ - rq->cmd[0] = MAINTENANCE_OUT; - rq->cmd[1] = MO_SET_TARGET_PGS; - put_unaligned_be32(stpg_len, &rq->cmd[6]); - rq->cmd_len = COMMAND_SIZE(MAINTENANCE_OUT); - - rq->sense = sense; - memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); - rq->sense_len = 0; - - err = blk_execute_rq(rq->q, NULL, rq, 1); - if (err < 0) { - if (!rq->errors) - err = DID_ERROR << 16; - else - err = rq->errors; - if (rq->sense_len) - err |= (DRIVER_SENSE << 24); - } - blk_put_request(rq); - - return err; + memset(cdb, 0x0, COMMAND_SIZE(MAINTENANCE_OUT)); + cdb[0] = MAINTENANCE_OUT; + cdb[1] = MO_SET_TARGET_PGS; + put_unaligned_be32(stpg_len, &cdb[6]); + + return scsi_execute(sdev, cdb, DMA_TO_DEVICE, stpg_data, stpg_len, + sense, ALUA_FAILOVER_TIMEOUT * HZ, + ALUA_FAILOVER_RETRIES, req_flags, NULL); } /*