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Message-Id: <20170920104032.14014-1-jthumshirn@suse.de>
Date: Wed, 20 Sep 2017 12:40:32 +0200
From: Johannes Thumshirn <jthumshirn@...e.de>
To: Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>,
Keith Busch <keith.busch@...el.com>
Cc: Hannes Reinecke <hare@...e.de>,
Linux NVMe Mailinglist <linux-nvme@...ts.infradead.org>,
Linux Kernel Mailinglist <linux-kernel@...r.kernel.org>,
Johannes Thumshirn <jthumshirn@...e.de>
Subject: [PATCH] nvme: make controller 'state' sysfs attribute pollable
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 <jthumshirn@...e.de>
---
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
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