From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751781AbdITKkr (ORCPT ); Wed, 20 Sep 2017 06:40:47 -0400 Received: from mx2.suse.de ([195.135.220.15]:51387 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751510AbdITKkq (ORCPT ); Wed, 20 Sep 2017 06:40:46 -0400 From: Johannes Thumshirn To: Christoph Hellwig , Sagi Grimberg , Keith Busch Cc: Hannes Reinecke , Linux NVMe Mailinglist , Linux Kernel Mailinglist , Johannes Thumshirn Subject: [PATCH] nvme: make controller 'state' sysfs attribute pollable Date: Wed, 20 Sep 2017 12:40:32 +0200 Message-Id: <20170920104032.14014-1-jthumshirn@suse.de> X-Mailer: git-send-email 2.13.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Notify sysfs about changes of a nvme controller so user-space can watch the file via poll() or select() in order to react to a state change. Signed-off-by: Johannes Thumshirn --- drivers/nvme/host/core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index acc816b67582..064d973f1e22 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -237,8 +237,10 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, break; } - if (changed) + if (changed) { ctrl->state = new_state; + sysfs_notify(&ctrl->dev->kobj, NULL, "state"); + } spin_unlock_irqrestore(&ctrl->lock, flags); -- 2.13.5