From patchwork Fri Feb 28 07:53:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 11411657 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 6E88517E0 for ; Fri, 28 Feb 2020 07:53:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4DB67246A8 for ; Fri, 28 Feb 2020 07:53:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727027AbgB1Hx0 (ORCPT ); Fri, 28 Feb 2020 02:53:26 -0500 Received: from mx2.suse.de ([195.135.220.15]:59836 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727023AbgB1HxZ (ORCPT ); Fri, 28 Feb 2020 02:53:25 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 5BF3DB1AD; Fri, 28 Feb 2020 07:53:21 +0000 (UTC) From: Hannes Reinecke To: "Martin K. Petersen" Cc: Christoph Hellwig , James Bottomley , linux-scsi@vger.kernel.org, Hannes Reinecke Subject: [PATCH 08/13] scsi: add scsi_host_(block,unblock) helper function Date: Fri, 28 Feb 2020 08:53:13 +0100 Message-Id: <20200228075318.91255-9-hare@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20200228075318.91255-1-hare@suse.de> References: <20200228075318.91255-1-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 to call scsi_internal_device_block()/ scsi_internal_device_unblock() for all attached devices on a scsi host. Signed-off-by: Hannes Reinecke Reviewed-by: Bart Van Assche Reviewed-by: Christoph Hellwig --- drivers/scsi/scsi_lib.c | 30 ++++++++++++++++++++++++++++++ include/scsi/scsi_host.h | 2 ++ 2 files changed, 32 insertions(+) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 610ee41fa54c..a48a5727831b 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -2845,6 +2845,36 @@ scsi_target_unblock(struct device *dev, enum scsi_device_state new_state) } EXPORT_SYMBOL_GPL(scsi_target_unblock); +int +scsi_host_block(struct Scsi_Host *shost) +{ + struct scsi_device *sdev; + int ret = 0; + + shost_for_each_device(sdev, shost) { + ret = scsi_internal_device_block(sdev); + if (ret) + break; + } + return ret; +} +EXPORT_SYMBOL_GPL(scsi_host_block); + +int +scsi_host_unblock(struct Scsi_Host *shost, int new_state) +{ + struct scsi_device *sdev; + int ret = 0; + + shost_for_each_device(sdev, shost) { + ret = scsi_internal_device_unblock(sdev, new_state); + if (ret) + break; + } + return ret; +} +EXPORT_SYMBOL_GPL(scsi_host_unblock); + /** * scsi_kmap_atomic_sg - find and atomically map an sg-elemnt * @sgl: scatter-gather list diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 25bef781cbe1..613c3820028e 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -758,6 +758,8 @@ static inline int scsi_host_scan_allowed(struct Scsi_Host *shost) extern void scsi_unblock_requests(struct Scsi_Host *); extern void scsi_block_requests(struct Scsi_Host *); +extern int scsi_host_block(struct Scsi_Host *shost); +extern int scsi_host_unblock(struct Scsi_Host *shost, int new_state); struct class_container;