From patchwork Tue Aug 8 10:42:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 713271 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB568C001DB for ; Tue, 8 Aug 2023 16:06:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231770AbjHHQGx (ORCPT ); Tue, 8 Aug 2023 12:06:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59340 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231444AbjHHQFi (ORCPT ); Tue, 8 Aug 2023 12:05:38 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 97136103 for ; Tue, 8 Aug 2023 08:45:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1691509501; h=from:from:reply-to:subject:subject: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=XUAbwUholcdP/E78pjIWjWfXWvuCT6ODN3CqmEOBnlY=; b=UECzg1f6CHsYmKAUzwAwYz8cF389gJXu2aED/ZD7IQyY47ojxO09ZXOguFMOjnhcn2r5lt Ag/5YpMMonE5lM7zvGnp9R4ZtPjKaivLo4jtWm4l+45vVSaVI/OfLf/2DnAzpL7HlOJn0S JO22nBbu8pfWy4ceSOdLZ4JCkJKer7I= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-281-mqAwsN78NDGj8C053Wpfuw-1; Tue, 08 Aug 2023 06:43:06 -0400 X-MC-Unique: mqAwsN78NDGj8C053Wpfuw-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 952398015AA; Tue, 8 Aug 2023 10:43:05 +0000 (UTC) Received: from localhost (unknown [10.72.120.3]) by smtp.corp.redhat.com (Postfix) with ESMTP id 93E12492C13; Tue, 8 Aug 2023 10:43:04 +0000 (UTC) From: Ming Lei To: Jens Axboe , Christoph Hellwig , linux-nvme@lists.infradead.org, "Martin K . Petersen" , linux-scsi@vger.kernel.org Cc: linux-block@vger.kernel.org, Wen Xiong , Keith Busch , Ming Lei Subject: [PATCH V3 05/14] scsi: core: add helper of scsi_max_nr_hw_queues() Date: Tue, 8 Aug 2023 18:42:30 +0800 Message-Id: <20230808104239.146085-6-ming.lei@redhat.com> In-Reply-To: <20230808104239.146085-1-ming.lei@redhat.com> References: <20230808104239.146085-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org blk_mq_alloc_tag_set() may change nr_hw_queues for kdump kernel, so driver has to take blk-mq max supported nr_hw_queues into account when figuring out nr_hw_queues from hardware info, for avoiding inconsistency between scsi driver and blk-mq. Add helper of scsi_max_nr_hw_queues() for avoiding nr_hw_queues inconsistency between scsi driver and blk-mq. Signed-off-by: Ming Lei --- include/scsi/scsi_host.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 70b7475dcf56..2273f855940f 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -803,6 +803,11 @@ extern int scsi_host_unblock(struct Scsi_Host *shost, int new_state); void scsi_host_busy_iter(struct Scsi_Host *, bool (*fn)(struct scsi_cmnd *, void *), void *priv); +static inline unsigned int scsi_max_nr_hw_queues(void) +{ + return blk_mq_max_nr_hw_queues(); +} + struct class_container; /*