From patchwork Sat Mar 25 01:17:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ye Bin X-Patchwork-Id: 667353 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 1D235C76195 for ; Sat, 25 Mar 2023 01:18:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232016AbjCYBSn (ORCPT ); Fri, 24 Mar 2023 21:18:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34854 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231913AbjCYBSk (ORCPT ); Fri, 24 Mar 2023 21:18:40 -0400 Received: from dggsgout12.his.huawei.com (dggsgout12.his.huawei.com [45.249.212.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE36F1A950; Fri, 24 Mar 2023 18:18:38 -0700 (PDT) Received: from mail02.huawei.com (unknown [172.30.67.169]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTP id 4Pk1Rt3QHsz4f3mLW; Sat, 25 Mar 2023 09:18:34 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.127.227]) by APP3 (Coremail) with SMTP id _Ch0CgCnUiDpSx5kmy0NFg--.49234S7; Sat, 25 Mar 2023 09:18:36 +0800 (CST) From: Ye Bin To: jejb@linux.ibm.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Ye Bin Subject: [PATCH 3/5] scsi: limit to set the host state Date: Sat, 25 Mar 2023 09:17:32 +0800 Message-Id: <20230325011734.507453-4-yebin@huaweicloud.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230325011734.507453-1-yebin@huaweicloud.com> References: <20230325011734.507453-1-yebin@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: _Ch0CgCnUiDpSx5kmy0NFg--.49234S7 X-Coremail-Antispam: 1UD129KBjvJXoW7ArWfKFy7WFykXFy5Kr47CFg_yoW8GFWkpF WDJa4agw4UWas7Kws3Wrs8Wr9xK348WryqgFZ2g34ruF18J3y5Ka1kCa45ZF45JFWfCFn7 JF4qqF98Cay0yFUanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUvGb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUWw A2048vs2IY020Ec7CjxVAFwI0_Gr0_Xr1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV W8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMc Ij6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_ Jr0_Gr1lF7xvr2IYc2Ij64vIr41l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr 0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY 17CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcV C0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY 6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa 73UjIFyTuYvjxU2PEfUUUUU X-CM-SenderInfo: p1hex046kxt4xhlfz01xgou0bp/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Ye Bin Now, we can set the host state with any value. Actually, it doesn't make sense. As previous patch introduce SHOST_BLOCKED state, set this state, it will blocking IO. So this patch limit to set the host with running/blocked state. Signed-off-by: Ye Bin --- drivers/scsi/scsi_sysfs.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index b14f95ac594e..42c5936c7711 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -203,6 +203,7 @@ store_shost_state(struct device *dev, struct device_attribute *attr, int i; struct Scsi_Host *shost = class_to_shost(dev); enum scsi_host_state state = 0; + enum scsi_host_state old_state; unsigned long flags; for (i = 0; i < ARRAY_SIZE(shost_states); i++) { @@ -216,8 +217,13 @@ store_shost_state(struct device *dev, struct device_attribute *attr, if (!state) return -EINVAL; + if (state != SHOST_RUNNING && state != SHOST_BLOCKED) + return -EINVAL; + spin_lock_irqsave(shost->host_lock, flags); - if (scsi_host_set_state(shost, state)) { + old_state = shost->shost_state; + if ((old_state != SHOST_RUNNING && old_state != SHOST_BLOCKED) || + scsi_host_set_state(shost, state)) { spin_unlock_irqrestore(shost->host_lock, flags); return -EINVAL; }