From patchwork Tue Aug 17 07:53:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Wilck X-Patchwork-Id: 499378 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 9BA31C4338F for ; Tue, 17 Aug 2021 07:53:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7B8546023B for ; Tue, 17 Aug 2021 07:53:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234492AbhHQHyD (ORCPT ); Tue, 17 Aug 2021 03:54:03 -0400 Received: from smtp-out2.suse.de ([195.135.220.29]:36390 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234402AbhHQHyD (ORCPT ); Tue, 17 Aug 2021 03:54:03 -0400 Received: from imap1.suse-dmz.suse.de (imap1.suse-dmz.suse.de [192.168.254.73]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 518531FF16; Tue, 17 Aug 2021 07:53:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1629186809; 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; bh=jR5mksTQbMltOxfHYpILuo1Kmh9W414axExGd8Q3OB0=; b=HphugntEi7+X/tZ11u0rhZgS7jZB7TudHmVPqugZ2uGB9+l4YfRIPqwl4IzJVmPqYBm7bW hbU7CaM/clEV0EMVtsoK21SxUGO292CtDD1b4vw+iDck+ObPiwJGCJEHqwOAcNY/1FEN1c OlxROHsMfS91F0XGur9aqm45KOE4pFs= Received: from imap1.suse-dmz.suse.de (imap1.suse-dmz.suse.de [192.168.254.73]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap1.suse-dmz.suse.de (Postfix) with ESMTPS id 1736413318; Tue, 17 Aug 2021 07:53:29 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap1.suse-dmz.suse.de with ESMTPSA id f5Y3A/lqG2EscAAAGKfGzw (envelope-from ); Tue, 17 Aug 2021 07:53:29 +0000 From: mwilck@suse.com To: "Martin K. Petersen" , Tyrel Datwyler , Hannes Reinecke Cc: linux-scsi@vger.kernel.org Subject: [PATCH RESEND] ibmvfc: do not wait for initial device scan Date: Tue, 17 Aug 2021 09:53:06 +0200 Message-Id: <20210817075306.11315-1-mwilck@suse.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Hannes Reinecke The initial device scan might take some time, and there really is no need to wait for it during probe(). So return immediately from scsi_scan_host() during probe() and avoid any udev stalls during booting. Signed-off-by: Hannes Reinecke Signed-off-by: Martin Wilck Acked-by: Tyrel Datwyler --- Patch resent unchanged, with my s-o-b and Tyler's a-b added. drivers/scsi/ibmvscsi/ibmvfc.c | 11 ++++++++--- drivers/scsi/ibmvscsi/ibmvfc.h | 1 + 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index 935b01ee44b7..9d6550488db1 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -3292,14 +3292,18 @@ static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) int done = 0; spin_lock_irqsave(shost->host_lock, flags); - if (time >= (init_timeout * HZ)) { + if (!vhost->scan_timeout) + done = 1; + else if (time >= (vhost->scan_timeout * HZ)) { dev_info(vhost->dev, "Scan taking longer than %d seconds, " - "continuing initialization\n", init_timeout); + "continuing initialization\n", vhost->scan_timeout); done = 1; } - if (vhost->scan_complete) + if (vhost->scan_complete) { + vhost->scan_timeout = init_timeout; done = 1; + } spin_unlock_irqrestore(shost->host_lock, flags); return done; } @@ -6084,6 +6088,7 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) vhost->client_scsi_channels = min(shost->nr_hw_queues, nr_scsi_channels); vhost->using_channels = 0; vhost->do_enquiry = 1; + vhost->scan_timeout = 0; strcpy(vhost->partition_name, "UNKNOWN"); init_waitqueue_head(&vhost->work_wait_q); diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h index 92fb889d7eb0..3718406e0988 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.h +++ b/drivers/scsi/ibmvscsi/ibmvfc.h @@ -876,6 +876,7 @@ struct ibmvfc_host { int reinit; int delay_init; int scan_complete; + int scan_timeout; int logged_in; int mq_enabled; int using_channels;