From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:57108 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725873AbeHNUXE (ORCPT ); Tue, 14 Aug 2018 16:23:04 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Don Brace , Kashyap Desai , Mike Snitzer , Laurence Oberman , Ming Lei , Hannes Reinecke , Christoph Hellwig , "Martin K. Petersen" , Omar Sandoval , James Bottomley Subject: [PATCH 4.14 004/104] scsi: core: introduce force_blk_mq Date: Tue, 14 Aug 2018 19:16:18 +0200 Message-Id: <20180814171515.550778177@linuxfoundation.org> In-Reply-To: <20180814171515.270692185@linuxfoundation.org> References: <20180814171515.270692185@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ming Lei commit 2f31115e940c4afd49b99c33123534e2ac924ffb upstream. This patch introduces 'force_blk_mq' to the scsi_host_template so that drivers that have no desire to support the legacy I/O path can signal blk-mq only support. [mkp: commit desc] Cc: Omar Sandoval , Cc: "Martin K. Petersen" , Cc: James Bottomley , Cc: Christoph Hellwig , Cc: Don Brace Cc: Kashyap Desai Cc: Mike Snitzer Cc: Laurence Oberman Signed-off-by: Ming Lei Reviewed-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/hosts.c | 1 + include/scsi/scsi_host.h | 3 +++ 2 files changed, 4 insertions(+) --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -474,6 +474,7 @@ struct Scsi_Host *scsi_host_alloc(struct shost->dma_boundary = 0xffffffff; shost->use_blk_mq = scsi_use_blk_mq; + shost->use_blk_mq = scsi_use_blk_mq || shost->hostt->force_blk_mq; device_initialize(&shost->shost_gendev); dev_set_name(&shost->shost_gendev, "host%d", shost->host_no); --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -452,6 +452,9 @@ struct scsi_host_template { /* True if the controller does not support WRITE SAME */ unsigned no_write_same:1; + /* True if the low-level driver supports blk-mq only */ + unsigned force_blk_mq:1; + /* * Countdown for host blocking with no commands outstanding. */