From patchwork Wed Nov 20 10:31:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 11253497 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ACE7A1593 for ; Wed, 20 Nov 2019 10:31:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8BAAD2243E for ; Wed, 20 Nov 2019 10:31:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728573AbfKTKb2 (ORCPT ); Wed, 20 Nov 2019 05:31:28 -0500 Received: from mx2.suse.de ([195.135.220.15]:49212 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728251AbfKTKb2 (ORCPT ); Wed, 20 Nov 2019 05:31:28 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 6FD0CB234; Wed, 20 Nov 2019 10:31:26 +0000 (UTC) From: Hannes Reinecke To: "Martin K. Petersen" Cc: Christoph Hellwig , James Bottomley , linux-scsi@vger.kernel.org, Hannes Reinecke Subject: [PATCH 07/11] scsi: add scsi_host_quiesce()/scsi_host_resume() helper Date: Wed, 20 Nov 2019 11:31:10 +0100 Message-Id: <20191120103114.24723-8-hare@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20191120103114.24723-1-hare@suse.de> References: <20191120103114.24723-1-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Add helper functions for quiescing/resuming all devices on a given scsi host. Signed-off-by: Hannes Reinecke --- drivers/scsi/scsi_lib.c | 18 ++++++++++++++++++ include/scsi/scsi_device.h | 2 ++ 2 files changed, 20 insertions(+) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 2563b061f56b..771a8352d3e8 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -2630,6 +2630,24 @@ scsi_target_resume(struct scsi_target *starget) } EXPORT_SYMBOL(scsi_target_resume); +void scsi_host_quiesce(struct Scsi_Host *shost) +{ + struct scsi_device *sdev; + + shost_for_each_device(sdev, shost) + scsi_device_quiesce(sdev); +} +EXPORT_SYMBOL(scsi_host_quiesce); + +void scsi_host_resume(struct Scsi_Host *shost) +{ + struct scsi_device *sdev; + + shost_for_each_device(sdev, shost) + scsi_device_resume(sdev); +} +EXPORT_SYMBOL(scsi_host_resume); + /** * scsi_internal_device_block_nowait - try to transition to the SDEV_BLOCK state * @sdev: device to block diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 3ed836db5306..2185068ce955 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -420,6 +420,8 @@ extern int scsi_device_quiesce(struct scsi_device *sdev); extern void scsi_device_resume(struct scsi_device *sdev); extern void scsi_target_quiesce(struct scsi_target *); extern void scsi_target_resume(struct scsi_target *); +extern void scsi_host_quiesce(struct Scsi_Host *); +extern void scsi_host_resume(struct Scsi_Host *); extern void scsi_scan_target(struct device *parent, unsigned int channel, unsigned int id, u64 lun, enum scsi_scan_mode rescan);